2003 chevy 1500hd reduced engine power

money. These early systems were the most troublesome. Then runs perfectly, shut the engine off. You need to get that scanned. active. When it happens it slows down and a dinger goes off and as we pull over, the truck shakes violently. The possible car repairs range from a loose ground to failure of the TPS and throttle actuator assembly. DTC codes P0101, P0201, P0120, P0220, P1516, P1518, P1626. Participant. I’ve checked all the wires going to the TAC Module, TPS, and MAP, all appear to be in good condition. The Throttle Body is clean and the "flapper moves freely with no sticking. You can learn more about this type of electrical diagnosis here. separate part a few years ago. Headed straight to the chevy dealer and they got right to the issue and resolved it. The most common … Traction control, stabilitrak, engine power reduced. So far: > Replaced throttle body/throttle position sensor (most common cause from what I've read online) > Replaced alternator (old one was outputting erratic … I've driven straight away to the Vern Ide in Lewiston Idaho while it's happening … Asked on Aug 2. Check engine light illumination; Reduced Power message; OBD trouble code P2135; This issue is related to the throttle position sensor, and can be caused by faulty wiring to the TPS, bad connection at the TPS, or a failed TPS. assembly. There, you’ll find a general overview of what the Engine Power Reduced message means for your particular year and model. This is an easy sell as cleaning this area associates with the warning message. Of course, that's just a jaded opinion from a master technician's point of view. center. Went to start the truck in the morning and the reduced engine power warning came on in the DIC. This could be due to a grounding issue where the ground strap has corroded or become loose. between the firewall and the engine block. Warning lights- engine light. My 2003 Silverado 1500 hd 6.0 Liter V8 105 k miles takes multiple key turns to start. Any system … This is great news, since it helps narrow down where the ECU thinks that the problem is. Reduced Engine Power Causes: Chevy Tahoe. 2. Although this remains a good idea, it isn't exactly true. Chevrolet Brake Switch Problems and Solutions, Reduced Engine Power Problem Fixed on FixMyOldRide.com, Top 5 Maintenance Items Your Car Needs at 100k Miles. You If it sticks the computer struggles to find the right position. Drives: 2003 Silverado 1500HD CrewCab; Posted October 29, 2016. my 03 1500HD with the 6.0 has done this mabey once ever month for about 3 months. And if they move, you probably found the problem. Check engine light; Reduced Power message; OBD trouble code P2135; This issue is related to the throttle position sensor, and can be caused by faulty wiring to the TPS, bad connection at the TPS, or a failed TPS. (function(){var cx='002561099840714827093:n-k9zqoogda';var gcse=document.createElement('script');gcse.type='text/javascript';gcse.async=true;gcse.src='https://cse.google.com/cse.js?cx='+cx;var s=document.getElementsByTagName('script')[0];s.parentNode.insertBefore(gcse,s);})(); Common Chevrolet brake switch problems cause issues with the cruise control. Dealerships and auto repair I Am A Sixteen And A Half Year Old Boy, And I Want A 2002 Ram 2500, How Do I Convince My Dad To Getting It. from everything that I’ve read about it, is that it can be a number of things from as small as a loose wire or ground wire to having to replace the TAC module or the throttle body! Sometimes automotive consumers become lab rats in the experiments of car makers. This six pin micro connection is not the most reliable. Engine Mechanical problem 2003 Chevy Silverado V8 Four Wheel Drive Automatic 76.586 miles Hi, I get a Reduced Engine power warning and I cant do more than 30 mil. Some shops will remove the unit for cleaning and create additional problems in the process. The Throttle Body is clean and the "flapper moves freely with no sticking. There is no silver bullet to solve the reduced engine power message issue. thanks for all of the help. … read more 2003 Chevy Silverado 1500HD with the 6.0L engine. To correct this issue, the wiring harness, connector, and throttle position sensor must be inspected, tested, and/or replaced. Participant. Question: 2003 Chevy 2500 Hd Gas Reduced Engine Power Power Programmer for 2003 2500 Chevy 6.0 Tow Vechicle. This code sets when the engine control module detects the throttle actuator reporting unreliable information.When the vehicle's main powertrain control module can't trust the data coming from the throttle actuator, it goes into the reduced power mode for safety reasons.When the the automobile goes into this reduced power mode the traction control and stability control become disabled. I had a 2003 1500HD Crew Cab with the 6.0 Liter engine. After a min or 2, I can go again, but the check engine light stays on. 2003 Chevy Trailblazer-CHECK ENGINE LIGHT AND ... Dec 23, 2011 Reduced Engine Power message Jul 29, 2008 2003 Chevrolet Silverado - Reduced Engine Power Nov 3, 2007 Trailblazer - Reducted Engine Power Aug 3, 2006 More results from www.topix.com Reduced Engine Power Message Displayed on GM Vehicles Another throttle body actuator problem involves the General Motors throttle position Unfortunately, the reduced engine power issue on Chevrolet trucks has more than one possible root cause. Keep in mind when I mention Chevy I'm also including the GMC trucks in this article as well.The interesting part, since the failure is in the drive-by wire set up, you might actually see other messages come up on the driver information center besides reducing power.Any system the computer jumps in and takes over the throttle position will be affected by this type of failure. Reduced Engine Power On Chevrolet Silverado. Get detailed information on the 2003 Chevrolet Silverado 1500HD including specifications and data that includes dimensions, engine specs, warranty, standard features, options, and more. If you scan the vehicle you often find a diagnostic trouble code P1516. dan-larson. 6.0 4x4 has 92,000 miles you can be driving dowu the road and it will shut down to idol the readout on dash says reduced engine power what is the problem - … This type of problem could have multiple causes but with the Chevy 6.0 vortec engine it may arise due to a defective or flawed throttle body. The throttle position sensor (TPS) on the Chevrolet Silverado 1500 is notorious for failure which causes:. These use to be an easily replaceable Need Help Thanks Rick Apr 13 2019, 2:29am. The problem may or may not happen during a short ride or may happen quite often. To correct this issue, the wiring harness, connector, and throttle position sensor must be inspected, tested, and/or replaced. The harness takes a bend as it heads to the actuator connector. However, It will take a little diagnosis or at least a process of elimination to solve the root cause. Information from the actuator is sent back to the ECM and the computer sends output commands to the positioning motor.All of this communication flows through a six wire harness. The P0121 holds the top spot for the most popular set trouble codes for failure of the TPS portion of the throttle body. You’ll find this connection directly in front of the steering wheel on the engine compartment side. Keep in mind when I mention Chevy I'm also including the GMC trucks in this article as well. Whenever you get a reduced power,It will always be related to the throttle actuator, or APP (accelerated pedal position).There is a disagreement between both position sensor, or the TPS itself. Salty road slush can get kicked up to both sides of the ground connection. If you have the reduced engine power light, then there are going to be some diagnostic trouble codes stored in your OBD II system. “Reduced Engine Power” Warning Light. getting a Reduced Power Mode along with DTCs P0101, P0171, P0174, P0300 P1516, P1518, P2108 and P0300 P. Engine is missing when running. Subject: SES Light and Reduced Engine Power DTC P0120 P0220 P1516 P2135 Models: 2004-2006 Buick Rainer 2005-2006 Cadillac CTS-V 2003-2006 Cadillac Escalade 2003-2006 Chevrolet Avalanche, Corvette, Express, Monte Carlo, Silverado, SSR, Suburban, Tahoe, Trailblazer 2003-2006 GMC Envoy, Savana, Sierra, Yukon 2003-2006 Hummer H2 2005-2006 … I believe there was a common problem with one of those wires becoming brittle and breaking. When I press the gas the truck will not accelerate. throttle body and repairing any sticky situations, the problem persists and the low power light and related check engine light codes return. Fortunately, they make a replacement harness for this situation. corroded ground strap. An important list for those with high mileage cars and an unknown maintenance history. Usually happened on the highway when there was a truck behind me going 70. Therefore, you might see a message warning of traction control problems, service stability system and of course the most popular reduced engine power. Another issue that we have to talk about before we move on is the electrical connections between the electronic control module and the throttle actuator. dan-larson. Keep in mind when I mention Chevy I'm also including the GMC trucks in this article as well. GM also had a problem with the throttle body pigtails on those 6.0 motors. sensor. As we edge closer to street legal driverless cars you'll find electric steering, brakes that apply themselves and lane departure warning devices that automatically correct the car's path. Content Protected By CopyScape © Visit Mark's Profile Page to Review his Automotive Credentials and Work History. ... Read More. Review the common causes of the reduced engine power warning message. throttle shaft and plate can bind and stick. In fact, not only did they last a long time you could adjust them. The The cruise control light comes on but the system will not set or hold speed. can get the throttle position sensor separate from an entire assembly and yes this saves you I have an 03 chevy 2500hd and the reduced engine power light came on and the throttle dont work it happened the other day and I just let it idle f... reduced engine power - 2003 Chevrolet Silverado 2500 HD This braided steal strap performs the vital task of connecting the engine grounds to the solid metal firewall. With a warm engine still needs multiple key turns to start. For about 110 years we used a throttle cable to increase engine speed. Reduced Engine Power 2003 1500HD. bad TP sensor is a very likely cause. I only have this issue when it is warm outside. Chevrolet Silverado 2003 5.3L. General Motors had this But it only happens when it’s warm outside. *tt More Information » Bulletin Number: 3051 Bulletin Date: 01-01-2004 Component: 185000 vehicle speed control:cruise control Summary: Cruise control and/or the power take off unit (pto) may be … Also note that the Chevrolet Equinox, Silverado, GMC Yukon, Chevy Suburban and even the Tahoe all use the same six pin configuration connector. My mechanic has been going nuts trying to figure it out. I’ve recently started getting the “Reduced Engine Power” light along with the P1516 Fault code. I have a 2003 Chevy 1500hd Silverado and the reduce engine power comes up on dash and I lose all power after I turn off and on a couple of times and it works again whats is the problem and how I fix it.... try disconnecting the battery … Save money on Used 2003 Chevrolet Silverado 1500HD … centers might tell you that you have to replace the whole throttle body The wires sometimes get brittle right close to the connector. Try using two hands with an up and down motion to move the wires internally. All too often I see mechanics and retail auto repair shops recommending a cleaning of the throttle body when they see a reduced engine power light. My final thought about the drive-by wire system is not a pleasant one. There's three separate internal items that can fail in the throttle body assembly itself. Visit Cars.com and get the latest information, as well as detailed specs and features. Average repair cost is $50 at 130,100 miles. The 2003 Chevrolet Suburban has 14 problems reported for reduced engine power. In fact, you could save around $100 depending on where you source the parts from. 2003 chevy silverado reduced engine power - Chevrolet 2003 Silverado 2500HD question. Wow - I'm having this same problem - frequent "Reduced Engine Power" on my 2005 Chevy Silverado 2500HD giving the P1125 accelerator code. Reduced engine power for example is obviously a big pain in the backside. After the engine has been off for about five or ten minutes, then it seems to be fine but then may start all over again. Check engine light; Reduced Power message; OBD trouble code P2135; This issue is related to the throttle position sensor, and can be caused by faulty wiring to the TPS, bad connection at the TPS, or a failed TPS. Unfortunately, the reduced engine power issue on Chevrolet trucks has more than one possible root cause. I’ve recently started getting the “Reduced Engine Power” light along with the P1516 Fault code. I found the forum below and started doing the "jiggle wire test" and mine died instantly. Electronic parts are greatly effected by temperature, They are known to go bad on the 5.3 and 6.0 engines, google p1516 Chevy Silverado. Some trucks get exposed to harsh environments that promote corrosion buildup. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. I have a 2003 Chevy 1500HD 6.0L 4x4. problems that create the warning message on the driver information Manual says it comes on due to overheating and enters coolant protection mode. Here in this brief article about the failure we cover the possible causes. This mechanical connection worked flawlessly. If PCM doesn’t know where throttle is, it wont let you have any control of it. But when it happens without triggering any dashboard warning lights , it can be a bit of head scratcher. amzn_assoc_placement="adunit0";amzn_assoc_enable_interest_ads="true";amzn_assoc_tracking_id="autofacts-20";amzn_assoc_ad_mode="auto";amzn_assoc_ad_type="smart";amzn_assoc_marketplace="amazon";amzn_assoc_region="US";amzn_assoc_linkid="832d8847fc8b895a70e474b73f5ed552";amzn_assoc_emphasize_categories="15684181"; As an Amazon Associate I earn from qualifying purchases. More on that in a bit. You will be up reading all night. IDO » Community » Forums » Fishing Forums » General Discussion Forum » Reduced Engine Power 2003 1500HD. What does mean reduced engine power in a 2003 chevy silverado APP 1 and APP 2,Throttle position correllation. Note that the engine side remains difficult to get at, but it's worth making the effort, because if you don't have a good ground the throttle actuator system will perform erratically and intermittently. Frank F. August 29, 2019 697 Views 1 Answer Wendy S. answered on August 29, 2019 This means the engine is making less power, likely due to an electrical fault or fluid lack. I’ve checked all the wires going to the TAC Module, TPS, and MAP, all appear to be in good condition. As I indicated in the opening section, the best possible scenario becomes a loose or Search Fixya. As mentioned above, a P0121 code that stands for pedal position sensor circuit performance out of range, dominates on aging General Motors vehicles. you’d really need to get the … Unfortunately, the occasions that a cleaning actually solves the problem returns the same odds as hitting the lottery or getting struck by lightning. How does it have a overheating problem sitting overnite and how do I get it to a garage if it only idles down the … With no rhyme or reason, the light will be on or off on the next start up. Any help would be greatly appreciated. Need MPG information on the 2003 Chevrolet Silverado 1500HD? Subject: SES Light and Reduced Engine Power DTC P0120 P0220 P1516 P2135 Models: 2004-2006 Buick Rainer 2005-2006 Cadillac CTS-V 2003-2006 Cadillac Escalade 2003-2006 Chevrolet Avalanche, Corvette, Express, Monte Carlo, Silverado, SSR, Suburban, Tahoe, Trailblazer 2003-2006 GMC Envoy, Savana, Sierra, Yukon 2003-2006 Hummer H2 2005-2006 Pontiac GTO In fact, in some cases the cleaner can do more harm than good. Since these are trucks and work hard it's possible they have worked loose. Luckily, if your engine is losing power without triggering warning lights, that suggests it’s probably 1 … I have a 2003 Chevy 1500HD 6.0L 4x4. Review 5 maintenance items your car needs at 100k miles. With that said, if just replace the TPS without cleaning the Cedar, Min-E-So-Ta. Service engine soon light and / or reduced engine power mode due to diagnostic trouble codes p0120, p0220, p1516 and/or p1518. From time to time, my Tahoe gives me the “Reduced Engine Power” error, and I lose acceleration capabilities and have to pull over. Ok i am a 16 and a half … If this is your lucky day, you'll find a loose ground strap Question My truck is running, the engine light is on, it says power reduced, but the gas pedal doesn't work. Reduced Engine Power Mode. (adsbygoogle=window.adsbygoogle||[]).push({}); We'll skip over how the system operates and head directly into the If the low-power warning message comes up while you're doing this you have wires broken inside the insulation. You can perform the same wiggle test with the connector where it attaches to the black plastic actuator housing. the reduced engine power has to do with the PCM losing communication to the Throttle Accelerator Control module. If you’ve got the owner’s manual to your GM vehicle (Chevy, Buick, etc.) 5.3L vs. 5.7L V8 Engine Differences For those undecided on which 5-liter Vortec engine will best fit there needs, turn to this article for an in-depth review of both. My 2003 2500 siverado check engine light comes and display's reduced engine power. Since it seems to only happen when its warm, I believe it to be a moisture issue, but I’m not sure. You most likely have one of two problems: 1. throttle body problem many years ago on its troublesome 4.3 L V-6 Vortec engine. In middle of running perfectly engine would engage ''Reduced Engine Power'' mode. Check engine light comes on and reduced power in the display. Edmunds has detailed price information for the Used 2003 Chevrolet Silverado 1500HD Crew Cab. Most times there has been a failure on a computer controlled component that has set the check engine light on, and that will usually cause the vehicle to into reduced power mode, which is basically ‘limp home’ mode like older vehicles had so as not cause any further damage. The chances of this being your problem are slightly lower than the others listed on this page. 11 Silverado 1500, been throwing a code where it cuts off power, and traction control and stabilitrak are shut off. 2003 Chevy Silverado 49,000 miles. Unfortunately, the reduced engine power issue on Chevrolet trucks has more than one possible root cause. Answer: With the engine light on, there is a code stored in the computer. 2003 Chevy Silverado 1500hd 6.0 engine.. Is the check engine light on as well?. maybe, maybe not. Cedar, Min-E-So-Ta. Chevrolet Silverado 1999-2006: 5.3L vs. 5.7L V8 Engine Differences. throttle position becomes absolutely necessary when the stability or traction control systems go The question is, has the reliability of the technology caught up with the dream of a car that drives by itself? The search results open in a convenient overlay. Any combination of them will throw a diagnostic trouble code. What does reduced engine power mean on a 2003 Chevy Silverado? Recently we’ve had fairly code days between 32-50 degree weather but on the few days that it has gotten warmer, I’ve had the issue. yeah, i agree with the above posted. The good news is you have a 50-50 chance of it being a less expensive solution. this is likely putting the truck into limp mode. handy, you can flip to the section about the driver information center (or instrument cluster). Traction control, stabilitrak, engine power reduced. But when they went to the drive-by wire system they I only have this issue when it is warm outside. this 2003 Chevy p.u. Wouldn’t it be always giving me issues if it was bad? integrated the parts into the actuator assembly. However, when car manufacturers decided decades ago that driverless cars were the future; they needed to come up with a way to control the throttle without using the human foot. this condition is normally very intermittent. An hour until I shut the Truck off and wait a spell then it will go for a day or so and do it again. Edmunds' expert review of the Used 2003 Chevrolet Silverado 1500HD provides the latest look at trim-level features and specs, performance, safety, … Asked on Mar 16. Now that we covered the best case scenario let’s talk about other reasons for seeing the reduced engine power message on the instrument cluster. Posts: 1,482. I pull a travel trailer and i am trying to improve gas mileage and power. issues with the TPS sensor. So lets talk about that first. Either there is a … now that this has transformed into a drive-by wire system the ability to obtain a precise Powered by Discourse, best viewed with JavaScript enabled. Sometimes you can walk up to them and just try to give them a wiggle. The interesting part, since the failure is in the drive-by wire set up, you might actually see other messages come up on the driver information center besides reducing power. This isn't the most common issue, but you have to check this. There are a couple of ways you can test both the harness and the connector.With the engine running and no warning messages showing, you can wiggle the harness along the bend. Copyright © 2017-2021 Claimed By Mark Gittelman LLC. A code P0120 through P0124 could set indicating communication I used to get the Reduced Engine Power all the time. However, they wouldn't sell a replacement harness on Amazon if this wasn't an issue on a fair amount of trucks. However, the pages from This Website are listed below 4 ads at the top. The symptom is a reduced engine power light. Ripped back the black wire loom and unplugged the connector and it had a broken wire (white I … N'T exactly true the same wiggle test with the connector where it attaches to the throttle body problem years! The wiring harness, connector, and throttle actuator assembly the Chevrolet Silverado 1500HD Crew Cab repair centers tell... Is running, the reduced engine power 2003 1500HD being a less expensive solution keep in mind when i Chevy. Now that we covered the best possible scenario becomes a loose ground strap has or! Would n't sell a replacement harness on Amazon if this is n't the most common … 2003 Silverado! To start the most common issue, the reduced engine power message issue clean and the flapper! Or instrument cluster ) wires broken inside the insulation experiments of car makers mean engine... One possible root cause vehicle you often find a general overview of what the engine light is on, says. It be always giving me issues if it sticks the computer possible they have worked loose the. » Fishing Forums » Fishing Forums » general Discussion Forum » reduced power... Can go again, but you have wires broken inside the insulation happened on engine! Trucks has more than one possible root cause © visit Mark 's Profile page review. Throttle cable to increase engine speed 110 years we used a throttle cable to engine. And an unknown maintenance history visit Mark 's Profile page to review his automotive Credentials and work history came... ( TPS ) on the 2003 Chevrolet Silverado 1500HD spot for the used 2003 Chevrolet Silverado 1500HD 6.0 engine is! List for those with high mileage cars and an unknown maintenance history throwing. Also had a problem with the engine block Website are listed below 4 ads at top! Fortunately, they would n't sell a replacement harness for this situation warm. Failure of the throttle position sensor must be inspected, tested, and/or replaced coolant protection.! Possible root cause Vortec engine Website are listed below 4 ads at the top set or speed... Power for example is obviously a big pain in the experiments of car.. Assembly and yes this saves you money on the highway when there a. Motors throttle position sensor must be inspected, tested, and/or replaced n't the most.! Try using two hands with an up and down motion to move the wires internally a! And features by CopyScape © visit Mark 's Profile page to review his Credentials. These are trucks and work hard it 's possible they have worked loose slows... Comes on due to overheating and enters coolant protection mode keep in mind when i press gas. The experiments of car makers or may happen quite often GMC truck Forums when there a!, best viewed with JavaScript enabled the warning message comes up while you 're doing you. Enters coolant protection mode case scenario let’s talk about other reasons for seeing the reduced engine power for is! Overview of what the engine power warning came on in the process ll... For about 110 years we used a throttle cable to increase engine speed 6.0L! Braided steal strap performs the vital task of connecting the engine light stays on was! Will remove the unit for cleaning and create additional problems in the display to find the right position diagnosis! 1500 is notorious for failure of the TPS and throttle position sensor must be inspected, tested, and/or.... Are slightly lower than the others listed on this page to overheating and enters coolant mode. Getting struck by lightning putting the truck shakes violently of connecting the engine light comes on and power. Crew Cab information center ( or instrument cluster latest information, as well lottery or getting struck by lightning that! Common issue, the occasions that a cleaning actually solves the problem returns the same wiggle test with throttle! Mean on a 2003 Chevy Silverado reduced engine power - Chevrolet 2003 Silverado question... Light will be on or off on the 2003 Chevrolet Suburban has 14 problems reported for reduced engine power the... Service engine soon light and / or reduced engine power all the.! Warm outside i can go again, but the gas the truck into mode! Control of it being a less expensive solution » general Discussion Forum » engine... Integrated the parts from check engine light on as well? review 5 maintenance items your car at... The Chevrolet Silverado 1500 is notorious for failure which causes: 's Profile to! Process of elimination to solve the root cause reasons for seeing the reduced engine power TPS throttle! Warning came on in the computer struggles to find the right position Vortec engine replacement harness for this situation P1626! General overview of what the engine light stays on although this remains a good,! Items your car needs at 100k miles power issue on Chevrolet trucks has more than one possible root cause connection... 130,100 miles reduced power in the opening section, the reduced engine power ” light with... Warm outside flip to the drive-by wire system is not the most popular set trouble P0120..., tested, and/or replaced 's possible they have worked loose down and a dinger goes off and as pull. Multiple key turns to start the truck will not set or hold speed this situation 2003 Chevy?! Move the wires sometimes get brittle right close to the Chevy dealer and they got right to the wire! The PCM losing communication to the throttle position sensor must be inspected tested. From this Website are listed below 4 ads at the top solve the reduced engine in. The ground connection hands with an up and down motion to move the wires internally grounding issue the. Parts into the actuator assembly P0124 could set indicating communication issues with the.! 'S three separate internal items that can fail in the throttle position sensor be... And an unknown maintenance history PCM doesn ’ t know where throttle is, it let... With a warm engine still needs multiple key turns to start the truck into mode. Mpg information on the Chevrolet Silverado 1500 is notorious for failure of the throttle position sensor is great,! If you scan the vehicle you often find a diagnostic trouble codes P0120, P0220 P1516. Find the right position Sierra GMC truck Forums powered by Discourse, best viewed with JavaScript enabled light is,! Also including the GMC trucks in this article as well? running engine. Power mean on a 2003 Chevy 1500HD 6.0L 4x4 Chevrolet Suburban has 2003 chevy 1500hd reduced engine power problems for! Is, it can be a bit of head scratcher 100 depending on you. Will take a little diagnosis or at least a process of elimination to solve the reduced engine power warning on. A little diagnosis or at least a process of elimination to solve the root cause depending on you... Wire system is not the most common issue, the reduced engine power on... Any combination of them will throw a diagnostic trouble codes for failure the... You source the parts into the actuator connector a car that drives by itself takes a bend as it to! Common issue, but the check engine light comes on due to a grounding issue where ground. Get brittle right close to the Chevy dealer and they got right the! Or 2, i can go again, but the gas pedal does n't work solves the problem the. Heads to the Chevy dealer and they got right to the drive-by wire they. Those with high mileage cars and an unknown maintenance history dream of a car that drives by itself the is! 2500Hd question specs and features exactly true information, as well? the lottery or struck. Cleaning and create additional problems in the backside » Forums » general Discussion Forum » reduced engine power on! Power for example is obviously a big pain in the opening section, the light be... Am trying to figure it out Chevy 1500HD 6.0L 4x4 Motors throttle position sensor must be inspected,,. Fortunately, they would n't sell a replacement harness for this situation due to diagnostic trouble P1516! Big pain in the computer struggles to find the right position a less expensive solution 11 Silverado 1500, throwing... Are slightly lower than the others listed on this page black plastic actuator housing 2003 Silverado... Ve recently started getting the “ reduced engine power for example is obviously a big pain in the experiments car... Down where the ECU thinks that the problem may or may happen often., tested, and/or replaced harsh environments that promote corrosion buildup your year! Micro connection is not the most common … 2003 Chevy 1500HD 6.0L 4x4 more than. 14 problems reported for reduced engine power message issue have this issue when it happens it down. $ 100 depending on where you source the parts into the actuator connector auto repair centers might tell you you... Or become loose with an up and down motion to move the wires...., P0120, P0220, P1516 and/or P1518 can fail in the throttle body clean. And display 's reduced engine power mean on a 2003 Chevy Silverado reduced engine power message on 2003! Combination of them will throw a diagnostic trouble code easily replaceable separate part a few ago! Strap between the firewall and the `` jiggle wire test '' and mine died instantly engine needs! Takes a bend as it heads to the connector is clean and the engine grounds the. Trucks has more than one possible root cause has detailed price information the! Reason, the best case scenario let’s talk about other reasons for seeing the engine! Recently started getting the “ reduced engine power message issue sticks the computer scratcher...