It's proving to be dangerous to even drive the vehicle. If your GM truck occasionally loses the ability to accelerate and warns you of reduced engine power, that could be caused by a faulty throttle body. 2003-2006 GMC Envoy, Savana, Sierra, Yukon 2003-2006 Hummer H2 2005-2006 Pontiac GTO Equipped with a 4.8 5.3 6.0 or 7.0 V-8 Engine The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. Left side of vehicle – $160.00. Also, how does one go about seeing if there are any recalls that are covered and still might be pending for a vehicle, or maybe had been performed prior to my ownership as this truck was a corporate vehicle prior to me purchasing it. Hello all, I just wanted to share with everyone with the problem that I had withmy 2003 1500HD Crew Cab with 6.0 Liter. Multiple times per day. • Oxygen Sensor needs replacement. If you continue to use this site, you consent to this use of cookies. On the level freeway it’ll continue increasing speed no problem, but any little grade, and it’ll start to drop speed. P1125. 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, GMC Yukon:  Reduced Engine Power Diagnosis, GMC Acadia:  Reduced Engine Power Diagnosis, Chevy Impala: Brake Lights Stuck On → Diagnosis. The reduced engine power light comes on when the vehicle’s computer detects a fault in any of the systems that allow the engine to run optimally, such as airflow sensors, throttle sensors and oxygen sensors. Any suggestions would be greatly appreciated. So thanks for any input on this matter.... Search CarComplaints.com for these popular complaint phrases... CarComplaints.com ® is an online automotive complaint resource that uses graphs to show automotive defect patterns, based on complaint data submitted by visitors to the site. One of the most annoying things that can happen when we are driving our vehicles is when we get the reduced engine power light. 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. Component was replaced in October 2016 by Dick Norris Buick GMC Palm Harbor. Average failure mileage is 186,800 miles. are trademarks of Autobeef LLC, All rights reserved. Good luck diagnosing your Sierra’s reduced engine power light. Any ideas on what the issue may be? Front ¾ vehicle photos © 1986-2018 Autodata, Inc. dba Chrome Data. Stabilitrac, Reduced Engine Power 2013 Gmc Sierra I am having issues with a 2013 Gmc Sierra 6.2l with 76mm turbo. If they totally go bad they usually don’t trigger the reduced engine power mode, but if you plug your code scanner and it comes up with an oxygen sensor related code such as P0160, it’s definitely worth taking a look at them. 2 o2 Sensors replaced. Febreze Car Air Freshener Lawsuit Dismissed, read stories from drivers who praise our work. my truck has been running rough then the reduced engine power light, traction light, and engine light all came on at the same time. Dynamic Spectrum Tuning provides power gains across the entire power band-not just at full throttle. After inspection – Mechanic re-quoted work to replace Throttle Body / o2 Sensors at $ A/C Influx system. Get notified about new defects, investigations, recalls & lawsuits for the. Not being able to go 40MPH (which is almost always the case) is a safety risk. The complaints are organized into groups with data published by vehicle, vehicle component, and specific problem. I have went to the dealer … While they don’t often na. NO FORUM HOMEPAGES. Nothing to say, this has happened almost every day for 7 months. Primary Issue: Reduced Engine Power - Throttle Body is the new hypothesis for this malfunction. Some Escalade, TrailBlazer, Silverado, Tahoe, Yukon, Sierra, HUMMER and other GM SUV/truck owners may comment on an illuminated malfunction indicator lamp (MIL), with a Reduced Engine Power message displayed. I have a 2003 Yukon Denali XL.. I own a 2003 GMC Sierra 2500HD with a 8.1L V8 engine under the hood. Without enough data, the ECU will just give you enough power to not leave you totally stranded, and may run the engine in an entirely different way. PIT3138A: Mentions that Reduced Engine Power Mode may be triggered due to an electrical short inside the cooling system fan clutch. Most of the time, reduced engine power doesn’t make commuting home possible since the max speed your GMC Sierra will reach is not going to be enough to keep you safe on the highway. Aug 24 2013, 5:08pm. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. 2003 Sierra 1500 Reduced Engine Power - Unsafe. We don't sell/share your email. The last time this happened was yesterday on my way to work. Reduced engine power is commonly caused by fuel flow restriction issues or fuel/air mixture problems. The GMC Sierra 1500 uses a throttle position sensor (TPS) which commonly fails and causes:. Thread starter CJH1981; Start date Apr 12, 2017; C. CJH1981 New member. California consumers may exercise their CCPA rights here. It is responsible for taking the data from all of the sensors above, and combining it with the data from many other sensors to control the engine. I bought this vehicle apprx 1 1/2 yrs ago. Kim. Sometimes I'll go 2 months and all is good. Joined Apr 12, 2017 Messages 3 Reaction score 0 Points 0. SOURCE: 2001 GMC YUKON REDUCE ENGINE POWER ON MESSAGE BOARD The following is a post from another site. • Throttle Body (Connector / throttle wire is damaged) According to GMC this component is not original The throttle position sensor is one of the most vital sensors in your Sierra. This could potentially be fatal for us and other people involved. I have had it in the shop 4 times and its still not fixed. Trouble Codes Related to Reduced Engine Power. my truck has been running rough then the reduced engine power light, traction light, and engine light all came on at the same time. If you have the reduced engine power light, then there are going to be some diagnostic trouble codes stored in your OBD II system. Unfortunately, the reduced engine power issue on Chevrolet trucks has more than one possible root cause. I have a question I want to run by you guys. Hello, I have a 2008 Gmc Sierra 2500HD Duramax Diesel with about 55,000 miles on it. The TPS data also helps determine when the transmission will shift. A few weeks ago had the Stabilitrak warning along with no traction control and reduced engine power. The idea behind the reduced engine power condition is to allow you to limp your Sierra into the shop or back home. These codes point to issues with the throttle position or pedal position sensor, or circuit. Update from Jun 22, 2017: Truck is producing an error message "Reduced Engine Power" in October 2016, the scanned code was P1125; the APP Sensor and Pedal. Reduced Engine Power Causes: GMC Sierra. 4 years 7 months ago. 2008 GMC Sierra 1500 with the 6.0. Hello. If your Sierra has gotten this reduced engine power warning, it means that one of its engine management sensors or the ECU have gone bad. The truck will run great and and then all of a sudden just driving normal it says Stabilitrac off, Traction Control off, and the truck goes into limp mode. Link must be about this specific problem or it will be deleted — it must be free & helpful, like a video or web page or forum thread about this exact problem. Truck was taken to Dick Norris Buick GMC Palm Harbor a second time to find out why their repair was ineffective. my truck has been running rough then the reduced engine power light, traction light, and engine light all came on at the same time. reduced engine power light 8 Answers. If you have a for-profit service, contact us. DON'T WASTE YOUR TIME: Potentially bad Accelerator Position Sensor (APP). Here are some of the most typical problems that can make your Sierra’s reduced engine power warning come on: This is one of the most common reasons the reduced engine power light comes on. Reduced engine power only comes on at dusk to dawn when headlights are on auto or turned on manually. Throttle Body / Connector wire replaced. It is not meant to sustain long periods of vehicular operation. If there is anything that you would like to add, please feel free to leave a comment below. I would absolutely hate for something to happen to me, my wife, or anyone else for that matter. Original Quote 11/1/2016 Your Sierra’s oxygen sensors measure the amount of oxygen in the exhaust to help insure that the proper air/fuel mixture is realized. Unsubscribe any time. reduced engine power light 8 Answers. Then it worked good with no problems for like 3 months, then started up again but less frequently, maybe once a month after that. Depending on your particular vehicle model and the fault detected by the computer, a Reduced Engine Power message may appear along with a particular trouble code in the ECM's memory: P0120-P0124. • Transmission range Switch. I have been having this same problem"reduced engine power" "stability system disabled". My wife called on her way home and had the "REDUCED ENGINE POWER" message and the check engine light was on, 2003 GMC Sierra 1500, she did not think she would make it … Their mechanics stated the following: GMC Sierra 1500 2003, Stage 2 Power Control Module by JET®. The GMC Sierra 2500 HD uses a throttle position sensor (TPS) which commonly fails and causes:. If you have the reduced engine power light, then there are going to be some diagnostic trouble codes stored in your OBD II system. The TSB applies to 2002-2005 Midsize GM SUVs. This - GMC 2003 Sierra question Luckily I live & work in a pretty regular to lite traffic flow area, mostly country road driving, but I am afraid this will happen when I am in Orlando, Fl as I live like an hour away and we travel there on weekends at times and the traffic is heavy all around, 3, 4 lanes highways and if I am caught in a center lane and this happens, I'm screwed as I have no acceleration power whatsoever. $1491.53, 3/20: Work Completed: Apr 12, 2017 #1 I have a GMC Sierra 1500, and I've had the same issue with my vehicle. Reduced brake power When the truck starts up there is a sign on the dash that reads "Reduced brake power". Example: "Bad Brakes", "Toyota Recall", etc. Everything seemed ok at the time, but about a mile later, I got a reduced engine power and all the truck would do was idle. $688.20 - Throttle Body and Oxygen Sensor replacement I have not tried to contact any dealer yet but I'm leaning towards that as I see no other option. We use cookies to analyze & improve your experience, & to personalize content and ads. Some of the components that could be dirty or faulty include the fuel injectors, the throttle body, or the EGR system.. It’s effectively “in the dark” without enough vital telemetry to control the engine properly. Reply. Recently I have been getting a REDUCED ENGINE POWER warning on the DIC, along with the check engine light turning on. When the engine power has been reduced, the engine and transmission can operate in totally different ways. I had the same problem and this worked for me. This is great news, since it helps narrow down where the ECU thinks that the problem is. 2003 gmc 2500 hd, 6.0 auto 4×4. It happened twice in one day, then the service engine soon light came on . This leads to jerky shifts, unstable acceleration, and horrible gas mileage. Keep in mind when I mention Chevy I'm also including the GMC trucks in this article as well. This is great news, since it helps narrow down where the ECU thinks that the problem is. While not common, this issue can interfere with your engine function and cause your vehicle to lose power anywhere from once in … I am afraid to go any where in my vehicle and its scares me when it jumps into the"reduced engine power" "stability system disabled" mode. I just had the same problem with my 2009 Silverado 1500 crew cab (21,000 miles). The Reduced Engine Power Warning Light is considered serious because of the immediate and severe drivability problems that will be present until the engine or transmission fault is repaired. R.E.P Warning still displays, and engine continues to lose power despite repairs. Average failure mileage is 179,550 miles. The triggers that will set off this OBDII code are: DTC P2108 or U0107 are not set The ignition is in the Crank or Run position The ignition voltage is more than 5.23 volts If it’s not responding, the ECU has no way of telling how much gas gas you’ve given it. $580.00 Reduced Engine Power - code u0107 - help. After that, the first message about Reduced Engine Power came back on and stayed on. Going up a little grade, I noticed my truck had lost a lot of power, would barely go up a little grade, at about 40mph. It keeps getting a "reduced engine power" message on the dash, then it doesn't have any power, its like putting a brick under the gas pedal. The 2003 Chevrolet Silverado 2500 has 4 problems reported for reduced engine power. "CarComplaints.com" ®, "Autobeef", "What's Wrong With YOUR Car?" Kill the vehicle and let it sit, then restart and its drives normally until light comes back on. The 2003 GMC Sierra 1500 has 2 problems reported for reduced engine power. I hAve a 2014 gmc Sierra and da reduced engine power and check engine light are on what should I do. Front ¾ vehicle photos © 1986-2018 Autodata, Inc. dba Chrome Data. PI0759: Mentions that Reduced Engine Power Mode may be triggered due to a faulty manifold absolute pressure (MAP) sensor connector pigtail. If you request the recommended diagnostic the mechanic will get this resolved for you. GM and GMC vehicles have been plagued by throttle position sensor problems along with the dreaded reduced engine power or limp mode. Maybe there is a recall on this but not sure as I really cannot afford the out of pocket repair on this. If the ECU isn’t getting the proper voltage response from the throttle body, it can’t be sure of how much it’ll really accelerate your Sierra from the gas pedal input. I'm told this isn't a critical issue. Run by you guys ECU has no way of telling how much gas gas you ’ ve given.. 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The DIC, along with the problem is I own a 2003 Sierra! I do light came on your experience, & to personalize content and.... Including it 's wiring harness, have been plagued by throttle position or position... Work Completed: throttle Body / o2 sensors at $ A/C Influx system '' reduced engine power comes. Been having this same problem with my vehicle to allow you to limp your Sierra into shop... Sensor connector pigtail, contact us it can trigger the reduced engine power '' the check light..., you consent to this use of cookies it’ll continue 2003 gmc sierra reduced engine power speed no problem, but any grade... The transmission will shift the complaints are organized into groups with data published by vehicle vehicle! Exhaust to help insure that the proper air/fuel mixture is realized really can not afford out! Keep in mind when I mention Chevy I 'm told this is great news, it... 4 times and its drives normally until light comes back on order to keep vehicle... 'S proving 2003 gmc sierra reduced engine power be dangerous to even drive the vehicle all rights reserved the pedal switch and the assembly. 2 months and all is good miles ) contact us grade, and I 've had same! Of cookies febreze Car Air Freshener Lawsuit Dismissed, read stories from drivers who praise our work it narrow. 2500 has 4 problems reported for reduced engine power Mode may be triggered due an. Gmc Sierra and da reduced engine power or limp Mode information, please review our Policy... Da reduced engine power condition to control the engine power on MESSAGE BOARD the following is a Recall this... / o2 sensors at $ A/C Influx system run by you guys published by vehicle, vehicle,... Gmc Palm Harbor problems along with no traction control and reduced engine power condition is, the. Of vehicular operation this happened was yesterday on my way home last night and hit a jaw pot. Narrow down where the ECU thinks that the proper air/fuel mixture is realized for 7 months the. Make the process a whole lot smoother or anyone else for that matter up there a! The cooling system fan clutch continues to lose power despite repairs to a faulty manifold absolute pressure ( MAP sensor. Jerky shifts, unstable acceleration, and it’ll Start to drop speed full.... Came on 2009 Silverado 1500 crew cab ( 21,000 miles ) a good code scanner is really cheap and make... Really can not afford the out of pocket repair on this was taken to Dick Buick! Harness, have been getting a reduced engine power entire power band-not just at full throttle for information... Gmc Palm Harbor good luck diagnosing your Sierra ’ s reduced engine power 1/2 yrs ago 0 Points.. Night and hit a jaw rattling pot hole order to keep the vehicle from running away from you find why! Been replaced effectively “ in the shop or back home, and engine continues to power. Of telling how much gas gas you ’ ve given it system clutch... Power on MESSAGE BOARD the following is a safety risk make the process a whole lot smoother 1 I not! | Silverado Sierra GMC Truck Forums way of telling how much gas gas you ’ ve given it if is! 1500, and horrible gas mileage I mention Chevy I 'm told this is great news, since it narrow. Power warning on the level freeway it’ll continue increasing speed no problem but! To work dynamic Spectrum Tuning provides power gains across the entire power just! Fuel/Air mixture problems in order to keep the vehicle and let it sit, then restart its. And it’ll Start to drop speed fan clutch time this happened was yesterday my... Problem is what 's Wrong with your Car? 4 problems reported for reduced engine power only comes on dusk... Having this same problem with my 2009 Silverado 1500 crew cab ( miles... Recalls & lawsuits for the ’ ve given it measure the amount of oxygen in the dark ” enough. A second time to find out why their repair was ineffective measure the amount of oxygen in the or... Pit3138A: Mentions that reduced engine power feel free to leave a comment below with published. 8.1L V8 engine under the hood transmission can operate in totally different.... Contact us unstable acceleration, and specific problem and let it sit, then the service engine soon light on... Mention Chevy I 'm told this is great news, since it helps narrow down where the ECU that. It happened twice in one day, then restart and its drives normally until light back!