My 2003 2500 siverado check engine light comes and display's reduced engine power. Unfortunately, the reduced engine power issue on Chevrolet trucks has more than one possible root cause. you’d really need to get the … 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. 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 it sticks the computer struggles to find the right position. 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. 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. General Motors had this In fact, in some cases the cleaner can do more harm than good. So far: > Replaced throttle body/throttle position sensor (most common cause from what I've read online) > Replaced alternator (old one was outputting erratic … Check engine light comes on and reduced power in the display. 2003 Chevy Silverado 49,000 miles. This is great news, since it helps narrow down where the ECU thinks that the problem is. Since it seems to only happen when its warm, I believe it to be a moisture issue, but I’m not sure. 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. Unfortunately, the occasions that a cleaning actually solves the problem returns the same odds as hitting the lottery or getting struck by lightning. What does mean reduced engine power in a 2003 chevy silverado APP 1 and APP 2,Throttle position correllation. Reduced Engine Power Causes: Chevy Tahoe. Reduced Engine Power 2003 1500HD. You will be up reading all night. 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. Sometimes you can walk up to them and just try to give them a wiggle. Reduced engine power for example is obviously a big pain in the backside. Participant. Then runs perfectly, shut the engine off. However, Keep in mind when I mention Chevy I'm also including the GMC trucks in this article as well. The harness takes a bend as it heads to the actuator connector. With a warm engine still needs multiple key turns to start. Salty road slush can get kicked up to both sides of the ground connection. A code P0120 through P0124 could set indicating communication The Throttle Body is clean and the "flapper moves freely with no sticking. centers might tell you that you have to replace the whole throttle body Any system … I found the forum below and started doing the "jiggle wire test" and mine died instantly. The cruise control light comes on but the system will not set or hold speed. Average repair cost is $50 at 130,100 miles. 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. throttle body and repairing any sticky situations, the problem persists and the low power light and related check engine light codes return. Therefore, you might see a message warning of traction control problems, service stability system and of course the most popular reduced engine power. You can learn more about this type of electrical diagnosis here. Another throttle body actuator problem involves the General Motors throttle position 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. Participant. IDO » Community » Forums » Fishing Forums » General Discussion Forum » Reduced Engine Power 2003 1500HD. An important list for those with high mileage cars and an unknown maintenance history. Since these are trucks and work hard it's possible they have worked loose. I’ve checked all the wires going to the TAC Module, TPS, and MAP, all appear to be in good condition. 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. this condition is normally very intermittent. integrated the parts into the actuator assembly. dan-larson. Any help would be greatly appreciated. Chevrolet Silverado 2003 5.3L. Keep in mind when I mention Chevy I'm also including the GMC trucks in this article as well. Asked on Mar 16. If you’ve got the owner’s manual to your GM vehicle (Chevy, Buick, etc.) Some shops will remove the unit for cleaning and create additional problems in the process. Try using two hands with an up and down motion to move the wires internally. This is an easy sell as cleaning this area associates with the warning message. I used to get the Reduced Engine Power all the time. corroded ground strap. money. When it happens it slows down and a dinger goes off and as we pull over, the truck shakes violently. More on that in a bit. (adsbygoogle=window.adsbygoogle||[]).push({}); We'll skip over how the system operates and head directly into the Answer: With the engine light on, there is a code stored in the computer. Fortunately, they make a replacement harness for this situation. Copyright © 2017-2021 Claimed By Mark Gittelman LLC. What does reduced engine power mean on a 2003 Chevy Silverado? 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! 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 wires sometimes get brittle right close to the connector. 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. But when it happens without triggering any dashboard warning lights , it can be a bit of head scratcher. Powered by Discourse, best viewed with JavaScript enabled. now that this has transformed into a drive-by wire system the ability to obtain a precise The P0121 holds the top spot for the most popular set trouble codes for failure of the TPS portion of the throttle body. issues with the TPS sensor. As I indicated in the opening section, the best possible scenario becomes a loose or active. In middle of running perfectly engine would engage ''Reduced Engine Power'' mode. The symptom is a reduced engine power light. 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. To correct this issue, the wiring harness, connector, and throttle position sensor must be inspected, tested, and/or replaced. Any combination of them will throw a diagnostic trouble code. Chevrolet Silverado 1999-2006: 5.3L vs. 5.7L V8 Engine Differences. Posts: 1,482. 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. As mentioned above, a P0121 code that stands for pedal position sensor circuit performance out of range, dominates on aging General Motors vehicles. In fact, not only did they last a long time you could adjust them. Traction control, stabilitrak, engine power reduced. If PCM doesn’t know where throttle is, it wont let you have any control of it. thanks for all of the help. Manual says it comes on due to overheating and enters coolant protection mode. If the low-power warning message comes up while you're doing this you have wires broken inside the insulation. With no rhyme or reason, the light will be on or off on the next start up. Review 5 maintenance items your car needs at 100k miles. yeah, i agree with the above posted. the reduced engine power has to do with the PCM losing communication to the Throttle Accelerator Control module. Sometimes automotive consumers become lab rats in the experiments of car makers. 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. There's three separate internal items that can fail in the throttle body assembly itself. … read more Went to start the truck in the morning and the reduced engine power warning came on in the DIC. You need to get that scanned. 2003 Chevy Silverado 1500HD with the 6.0L engine. dan-larson. Cedar, Min-E-So-Ta. I’ve recently started getting the “Reduced Engine Power” light along with the P1516 Fault code. 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 - … The 2003 Chevrolet Suburban has 14 problems reported for reduced engine power. Edmunds' expert review of the Used 2003 Chevrolet Silverado 1500HD provides the latest look at trim-level features and specs, performance, safety, … Need MPG information on the 2003 Chevrolet Silverado 1500HD? And power the Forum below and started doing the `` flapper moves freely with no rhyme or,... 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