this condition is normally very intermittent. 2003 Chevy Silverado 1500hd 6.0 engine.. Is the check engine light on as well?. active. This six pin micro connection is not the most reliable. The 2003 Chevrolet Suburban has 14 problems reported for reduced engine power. this 2003 Chevy p.u. I had a 2003 1500HD Crew Cab with the 6.0 Liter engine. I have a 2003 Chevy 1500HD 6.0L 4x4. You problems that create the warning message on the driver information My final thought about the drive-by wire system is not a pleasant one. 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. Since these are trucks and work hard it's possible they have worked loose. This is great news, since it helps narrow down where the ECU thinks that the problem is. 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. Traction control, stabilitrak, engine power reduced. 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! Some trucks get exposed to harsh environments that promote corrosion buildup. Get detailed information on the 2003 Chevrolet Silverado 1500HD including specifications and data that includes dimensions, engine specs, warranty, standard features, options, and more. centers might tell you that you have to replace the whole throttle body 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. If the low-power warning message comes up while you're doing this you have wires broken inside the insulation. Edmunds has detailed price information for the Used 2003 Chevrolet Silverado 1500HD Crew Cab. dan-larson. You need to get that scanned. 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. DTC codes P0101, P0201, P0120, P0220, P1516, P1518, P1626. Then runs perfectly, shut the engine off. thanks for all of the help. Also note that the Chevrolet Equinox, Silverado, GMC Yukon, Chevy Suburban and even the Tahoe all use the same six pin configuration connector. I've driven straight away to the Vern Ide in Lewiston Idaho while it's happening … Answer: With the engine light on, there is a code stored in the computer. Traction control, stabilitrak, engine power reduced. 2003 Chevy Silverado 49,000 miles. Check engine light comes on and reduced power in the display. Unfortunately, the reduced engine power issue on Chevrolet trucks has more than one possible root cause. 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. There is no silver bullet to solve the reduced engine power message issue. I found the forum below and started doing the "jiggle wire test" and mine died instantly. With a warm engine still needs multiple key turns to start. You can learn more about this type of electrical diagnosis here. The possible car repairs range from a loose ground to failure of the TPS and throttle actuator assembly. With that said, if just replace the TPS without cleaning the I have a 2003 Chevy 1500HD 6.0L 4x4. There, you’ll find a general overview of what the Engine Power Reduced message means for your particular year and model. The most common … So far: > Replaced throttle body/throttle position sensor (most common cause from what I've read online) > Replaced alternator (old one was outputting erratic … Usually happened on the highway when there was a truck behind me going 70. There's three separate internal items that can fail in the throttle body assembly itself. 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 The throttle position sensor (TPS) on the Chevrolet Silverado 1500 is notorious for failure which causes:. To correct this issue, the wiring harness, connector, and throttle position sensor must be inspected, tested, and/or replaced. I only have this issue when it is warm outside. 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 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. Reduced Engine Power Causes: Chevy Tahoe. These early systems were the most troublesome. integrated the parts into the actuator assembly. Save money on Used 2003 Chevrolet Silverado 1500HD … money. assembly. The P0121 holds the top spot for the most popular set trouble codes for failure of the TPS portion of the throttle body. The wires sometimes get brittle right close to the connector. In fact, you could save around $100 depending on where you source the parts from. I only have this issue when it is warm outside. 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. Therefore, you might see a message warning of traction control problems, service stability system and of course the most popular reduced engine power. This could be due to a grounding issue where the ground strap has corroded or become loose. the reduced engine power has to do with the PCM losing communication to the Throttle Accelerator Control module. Since it seems to only happen when its warm, I believe it to be a moisture issue, but I’m not sure. As I indicated in the opening section, the best possible scenario becomes a loose or Chevrolet Brake Switch Problems and Solutions, Reduced Engine Power Problem Fixed on FixMyOldRide.com, Top 5 Maintenance Items Your Car Needs at 100k Miles. Here in this brief article about the failure we cover the possible causes. I’ve checked all the wires going to the TAC Module, TPS, and MAP, all appear to be in good condition. So lets talk about that first. 2003 Chevy Silverado 1500HD with the 6.0L engine. I pull a travel trailer and i am trying to improve gas mileage and power. (adsbygoogle=window.adsbygoogle||[]).push({}); We'll skip over how the system operates and head directly into the Although this remains a good idea, it isn't exactly true. However, they wouldn't sell a replacement harness on Amazon if this wasn't an issue on a fair amount of trucks. 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 … Edmunds' expert review of the Used 2003 Chevrolet Silverado 1500HD provides the latest look at trim-level features and specs, performance, safety, … Warning lights- engine light. Question: 2003 Chevy 2500 Hd Gas Reduced Engine Power Power Programmer for 2003 2500 Chevy 6.0 Tow Vechicle. throttle body problem many years ago on its troublesome 4.3 L V-6 Vortec engine. But it only happens when it’s warm outside. 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. 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. ... Read More. However, the pages from This Website are listed below 4 ads at the top. Unfortunately, the occasions that a cleaning actually solves the problem returns the same odds as hitting the lottery or getting struck by lightning. bad TP sensor is a very likely cause. 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. The harness takes a bend as it heads to the actuator connector. With no rhyme or reason, the light will be on or off on the next start up. But when it happens without triggering any dashboard warning lights , it can be a bit of head scratcher. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. To correct this issue, the wiring harness, connector, and throttle position sensor must be inspected, tested, and/or replaced. You can perform the same wiggle test with the connector where it attaches to the black plastic actuator housing. Ok i am a 16 and a half … Reduced Engine Power On Chevrolet Silverado. throttle shaft and plate can bind and stick. I’ve checked all the wires going to the TAC Module, TPS, and MAP, all appear to be in good condition. On or off on the next start up could adjust them lab rats in the throttle body itself... Or instrument cluster ) an up and down motion to move the wires internally doing this you have broken... This page repair centers might tell you that you have to check this losing... 100 depending on where you source the parts from your particular year and model warning message saves! Does mean reduced engine power message on the Chevrolet Silverado 1500HD Crew Cab running, the truck will set! 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