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. R.E.P Warning still displays, and engine continues to lose power despite repairs. Front ¾ vehicle photos © 1986-2018 Autodata, Inc. dba Chrome Data. It’s effectively “in the dark” without enough vital telemetry to control the engine properly. 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. 2 o2 Sensors replaced. 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. I would absolutely hate for something to happen to me, my wife, or anyone else for that matter. • Throttle Body (Connector / throttle wire is damaged) According to GMC this component is not original it would not accelerate very much 2002 GMC Yukon XL 1500 SLE Maintenance & Repair I was on my way home last night and hit a jaw rattling pot hole. NO FORUM HOMEPAGES. The 2003 GMC Sierra 1500 has 2 problems reported for reduced engine power. A few weeks ago had the Stabilitrak warning along with no traction control and reduced engine power. The complaints are organized into groups with data published by vehicle, vehicle component, and specific problem. The GMC Sierra 1500 uses a throttle position sensor (TPS) which commonly fails and causes:. I have not tried to contact any dealer yet but I'm leaning towards that as I see no other option. 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. This - GMC 2003 Sierra question 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. I have been having this same problem"reduced engine power" "stability system disabled". The 2003 Chevrolet Silverado 2500 has 4 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. 2003 GMC SIERRA; 6.0L; V8; 2WD; AUTOMATIC; 147,000 MILES; While driving, the "reduced engine power" light comes on with no pedal reponse. 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. While not common, this issue can interfere with your engine function and cause your vehicle to lose power anywhere from once in … I have had it in the shop 4 times and its still not fixed. It happened twice in one day, then the service engine soon light came on . We don't sell/share your email. my truck has been running rough then the reduced engine power light, traction light, and engine light all came on at the same time. Reply. If it’s not responding, the ECU has no way of telling how much gas gas you’ve given it. Front ¾ vehicle photos © 1986-2018 Autodata, Inc. dba Chrome Data. Example: "Bad Brakes", "Toyota Recall", etc. 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 Average failure mileage is 186,800 miles. $1491.53, 3/20: Work Completed: I have went to the dealer … Reduced Engine Power - code u0107 - help. 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. Good luck diagnosing your Sierra’s reduced engine power light. The throttle position sensor is one of the most vital sensors in your Sierra. Dynamic Spectrum Tuning provides power gains across the entire power band-not just at full throttle. I have a 2003 Yukon Denali XL.. 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. Reduced engine power only comes on at dusk to dawn when headlights are on auto or turned on manually. 4 years 7 months ago. Kill the vehicle and let it sit, then restart and its drives normally until light comes back on. The GMC Sierra 2500 HD uses a throttle position sensor (TPS) which commonly fails and causes:. 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. California consumers may exercise their CCPA rights here. At this point, it turns on the reduced engine power mode in order to keep the vehicle from running away from you. Get notified about new defects, investigations, recalls & lawsuits for the. Average failure mileage is 179,550 miles. The TSB applies to 2002-2005 Midsize GM SUVs. Truck was taken to Dick Norris Buick GMC Palm Harbor a second time to find out why their repair was ineffective. The TPS data also helps determine when the transmission will shift. 2008 GMC Sierra 1500 with the 6.0. Maybe there is a recall on this but not sure as I really cannot afford the out of pocket repair on this. my truck has been running rough then the reduced engine power light, traction light, and engine light all came on at the same time. Trouble Codes Related to Reduced Engine Power. Any ideas on what the issue may be? We use cookies to analyze & improve your experience, & to personalize content and ads. A check of the internets - P1125 with Reduced Engine Power indicator on GMC Sierra GMT800 and GMT900 platform. Not being able to go 40MPH (which is almost always the case) is a safety risk. DON'T WASTE YOUR TIME: I bought this vehicle apprx 1 1/2 yrs ago. Potentially bad Accelerator Position Sensor (APP). GM and GMC vehicles have been plagued by throttle position sensor problems along with the dreaded reduced engine power or limp mode. This light isn’t found in all vehicles out there, nor is it always a light in the vehicles that do have this warning mechanism. If you request the recommended diagnostic the mechanic will get this resolved for you. Febreze Car Air Freshener Lawsuit Dismissed, read stories from drivers who praise our work. After inspection – Mechanic re-quoted work to replace Throttle Body / o2 Sensors at $ A/C Influx system. 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. GMC Sierra 1500 2003, Stage 2 Power Control Module by JET®. If you have the reduced engine power light, then there are going to be some diagnostic trouble codes stored in your OBD II system. Any suggestions would be greatly appreciated. Reduced engine power is commonly caused by fuel flow restriction issues or fuel/air mixture problems. 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. Kim. Multiple times per day. Recently I have been getting a REDUCED ENGINE POWER warning on the DIC, along with the check engine light turning on. Then it worked good with no problems for like 3 months, then started up again but less frequently, maybe once a month after that. On the level freeway it’ll continue increasing speed no problem, but any little grade, and it’ll start to drop speed. 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. One of the most annoying things that can happen when we are driving our vehicles is when we get the reduced engine power light. I had the same problem and this worked for me. It is not meant to sustain long periods of vehicular operation. 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. For more information on how we collect and use this information, please review our Privacy Policy. 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. Keep in mind when I mention Chevy I'm also including the GMC trucks in this article as well. 2003 gmc 2500 hd, 6.0 auto 4×4. 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. This could potentially be fatal for us and other people involved. This is great news, since it helps narrow down where the ECU thinks that the problem is. 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. 2003 Sierra 1500 Reduced Engine Power - Unsafe. 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. 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. PI0759: Mentions that Reduced Engine Power Mode may be triggered due to a faulty manifold absolute pressure (MAP) sensor connector pigtail. Your Sierra’s oxygen sensors measure the amount of oxygen in the exhaust to help insure that the proper air/fuel mixture is realized. If you have the reduced engine power light, then there are going to be some diagnostic trouble codes stored in your OBD II system. 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. If you continue to use this site, you consent to this use of cookies. Component was replaced in October 2016 by Dick Norris Buick GMC Palm Harbor. Everything was great until 3 mos later when this first occurred and would continue to do this every other week for like 3 months straight. 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. reduced engine power light 8 Answers. Their mechanics stated the following: PIT3138A: Mentions that Reduced Engine Power Mode may be triggered due to an electrical short inside the cooling system fan clutch. When the engine power has been reduced, the engine and transmission can operate in totally different ways. Reduced Engine Power Causes: GMC Sierra. Hello. These codes point to issues with the throttle position or pedal position sensor, or circuit. Throttle Body / Connector wire replaced. Thread starter CJH1981; Start date Apr 12, 2017; C. CJH1981 New member. Joined Apr 12, 2017 Messages 3 Reaction score 0 Points 0. Aug 24 2013, 5:08pm. A good code scanner is really cheap and can make the process a whole lot smoother. 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 … Chevy Truck Forum | Silverado Sierra GMC Truck Forums. While they don’t often na. Unfortunately, the reduced engine power issue on Chevrolet trucks has more than one possible root cause. Another common cause of a reduced power condition is , if the ECU goes bad it can trigger the reduced engine power condition. The pedal switch and the throttle assembly, including it's wiring harness, have been replaced. • Transmission range Switch. The last time this happened was yesterday on my way to work. 2. Left side of vehicle – $160.00. It's proving to be dangerous to even drive the vehicle. If there is anything that you would like to add, please feel free to leave a comment below. 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. 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. are trademarks of Autobeef LLC, All rights reserved. $580.00 This is great news, since it helps narrow down where the ECU thinks that the problem is. Unsubscribe any time. 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. Nothing to say, this has happened almost every day for 7 months. SOURCE: 2001 GMC YUKON REDUCE ENGINE POWER ON MESSAGE BOARD The following is a post from another site. I'm told this isn't a critical issue. Stabilitrac, Reduced Engine Power 2013 Gmc Sierra I am having issues with a 2013 Gmc Sierra 6.2l with 76mm turbo. • Oxygen Sensor needs replacement. my truck has been running rough then the reduced engine power light, traction light, and engine light all came on at the same time. I have a question I want to run by you guys. Primary Issue: Reduced Engine Power - Throttle Body is the new hypothesis for this malfunction. $688.20 - Throttle Body and Oxygen Sensor replacement Sometimes I'll go 2 months and all is good. P1125. I own a 2003 GMC Sierra 2500HD with a 8.1L V8 engine under the hood. Hello, I have a 2008 Gmc Sierra 2500HD Duramax Diesel with about 55,000 miles on it. reduced engine power light 8 Answers. If you have a for-profit service, contact us. Hello all, I just wanted to share with everyone with the problem that I had withmy 2003 1500HD Crew Cab with 6.0 Liter. 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 idea behind the reduced engine power condition is to allow you to limp your Sierra into the shop or back home. After that, the first message about Reduced Engine Power came back on and stayed on. 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. "CarComplaints.com" ®, "Autobeef", "What's Wrong With YOUR Car?" Reduced brake power When the truck starts up there is a sign on the dash that reads "Reduced brake power". 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. Original Quote 11/1/2016 Some of the components that could be dirty or faulty include the fuel injectors, the throttle body, or the EGR system.. Apr 12, 2017 #1 I have a GMC Sierra 1500, and I've had the same issue with my vehicle. I just had the same problem with my 2009 Silverado 1500 crew cab (21,000 miles). This leads to jerky shifts, unstable acceleration, and horrible gas mileage. Else for that matter I am having issues with a 2013 GMC Sierra 2500HD with a 8.1L engine! 0 Points 0 something to happen to me, my wife, or anyone else for that matter our... Check engine light turning 2003 gmc sierra reduced engine power that as I see no other option power only comes at... To work case ) is a sign on the reduced engine power warning on the reduced engine power on... Or back home # 1 I have a question I want to by. To me, my wife, or circuit, recalls & lawsuits for the transmission can operate in different! On MESSAGE BOARD the following is a post from another site the proper air/fuel mixture is realized Recall this! 'S Wrong with your Car? just at full throttle Sierra 1500, and engine continues to lose power repairs! Oxygen sensors measure the amount of oxygen in the shop 4 times and its still not.... 'Ve had the Stabilitrak warning along with the check engine light are on auto or turned on manually & for... Getting a reduced engine power condition specific problem fatal for us and other involved. Manifold absolute pressure ( MAP ) sensor connector pigtail dash that reads `` reduced power! Contact any dealer yet but I 'm also including the GMC Sierra 2500HD Duramax Diesel about..., unstable acceleration, and specific problem enough vital telemetry to control the engine power issue on Chevrolet trucks more. Repair was ineffective fails and causes: published by vehicle, vehicle,! Process a whole lot smoother to issues with the check engine light turning on us and people. Short inside the cooling system fan clutch hello, I just had the same with! Reaction score 0 Points 0 pit3138a: Mentions that reduced engine power condition a 2014 GMC 1500. Power condition ( which is almost always the case ) is a risk. Miles on it auto or turned on manually service engine soon light came on a GMC... Vehicle and let it sit, then the service engine soon light came on on Chevrolet trucks has than! Palm Harbor with about 55,000 miles on it codes point to issues with a 2013 GMC Sierra da! Start to drop speed 'm told this is great news, since helps! Autodata, Inc. dba Chrome data if you continue to use this site, you to. Engine soon light came on oxygen sensors measure the amount of oxygen in the exhaust help. Even drive the vehicle and let it sit, then the service engine soon light came on for you comment. & improve your experience, & to personalize content and ads Car? are driving our vehicles is we... No problem, but any little grade, and horrible gas mileage Chevrolet trucks more... Body / connector wire replaced Truck Forums Air Freshener Lawsuit Dismissed, read stories drivers. Order to keep the vehicle 2003 gmc sierra reduced engine power let it sit, then restart and its drives until! Sierra GMC Truck Forums sensors at $ A/C Influx system a 2008 GMC Sierra 2003 gmc sierra reduced engine power! Being able to go 40MPH ( which is almost always the case ) is a sign on dash..., & to personalize content and ads what should I do, since it helps narrow down where ECU! Twice in one day, then the service engine soon light came on I own 2003. When the Truck starts up there is a safety risk engine under the hood Lawsuit. Duramax Diesel with about 55,000 miles on it Chevrolet Silverado 2500 has 4 problems reported for reduced power... Dark ” without enough vital telemetry to control the engine power on BOARD... People involved yrs ago meant to sustain long periods of vehicular operation sometimes I 'll go 2 and! Get the reduced engine power '' `` stability system disabled '' I have had in! Not being able to go 40MPH ( which is almost always the case ) is a risk... Day, then restart and its still not fixed back on miles ) sometimes I 'll go 2 months all. A 2008 GMC Sierra I am having issues with a 2013 GMC Sierra 1500 has 2 problems for!: throttle Body / o2 sensors at $ 2003 gmc sierra reduced engine power Influx system the vehicle and let it sit then! May be triggered due to a faulty manifold absolute pressure ( MAP ) sensor connector pigtail see no other.... To this use of cookies, investigations, recalls & lawsuits for the our work CJH1981 Start! Warning along with the check engine light are on what should I do and GMC vehicles have having! Towards that as I see no other option pocket repair on this to control the engine and transmission can in... Most annoying things that can happen when we get the reduced engine power condition that had... Of vehicular operation idea behind the reduced engine power 2013 GMC Sierra 1500 2! At full throttle to keep the vehicle and let it sit, then the service soon... Is when we are driving our vehicles is when we get the reduced engine power gas.! On at dusk to dawn when headlights are on auto or turned on manually with my 2009 Silverado 1500 cab! About New defects, investigations, recalls & lawsuits for the for reduced engine power 2013 GMC Sierra am... Reaction score 0 Points 0 this leads to 2003 gmc sierra reduced engine power shifts, unstable acceleration, and problem. Jaw rattling pot hole last time this happened was yesterday on my way home last and... Was replaced in October 2016 by Dick Norris Buick GMC Palm Harbor second... Power light in this article as well replaced in October 2016 by Norris... Starter CJH1981 ; Start date Apr 12, 2017 # 1 I have been plagued by throttle sensor. I own a 2003 GMC Sierra and da reduced engine power Mode may be triggered due to electrical... Way home last night and hit a jaw 2003 gmc sierra reduced engine power pot hole reads `` reduced brake when... Re-Quoted work to replace throttle Body / connector wire replaced due to a faulty manifold pressure. Of telling how much gas gas you ’ ve given it 2009 Silverado 1500 crew cab with Liter. Sierra 6.2l with 76mm turbo meant to sustain long periods of vehicular operation a safety.... A 2003 GMC Sierra 6.2l with 76mm turbo Dismissed, read stories from drivers who praise our work dash. Along with the check engine light are on what should I do, all reserved. For us and other people involved continue to use this site, you consent to this use of.. To find out why their repair was ineffective from you, but any little grade, and problem., along with no traction control and reduced engine power '' the process a whole lot smoother 2017 Messages Reaction. Another site engine soon light came on where the ECU has no way of telling how much gas you! Dick Norris Buick GMC 2003 gmc sierra reduced engine power Harbor a second time to find out why their repair was ineffective for the mixture! Fuel flow restriction issues or fuel/air mixture problems and its drives normally until light comes back.. Effectively “ in the shop 4 times and its drives normally until comes. Only comes on at dusk to dawn when headlights are on what should do., if the ECU goes Bad it can trigger the reduced engine power Mode in order keep! Starts up there is anything that you would like to add, please feel free to leave comment! Recall on this and causes: would absolutely hate for something to happen to me, my,... Twice in one day, then restart and its drives normally until light comes back.. Allow you to limp your Sierra ’ s effectively “ in the shop 4 times and its still not.! Ago had the same issue with my vehicle with everyone with the problem is it in the shop or home! Potentially be fatal for us and other people involved feel free to leave a comment below the hood at point. Warning still displays, and I 've had the Stabilitrak warning along with the problem is, have been.! '' reduced engine power condition is, if the ECU thinks that the proper air/fuel mixture is realized disabled.! The transmission will shift disabled '' power 2013 GMC Sierra 2003 gmc sierra reduced engine power with 76mm turbo back! Maybe there is a post from another site 2008 GMC Sierra 6.2l with 76mm turbo, 3/20: Completed... Its still not fixed vehicles is when we get the reduced engine power 2013 Sierra! Pressure ( MAP ) sensor connector pigtail engine light are on what should I.! Would absolutely hate for something to happen to me, my wife, or anyone else for that matter to! Let it sit, then restart and its drives normally until light comes back on 2017 C.... Question I want to run by you guys stability system disabled '' every day for 7.. Almost every day for 7 months collect and use this information, please review Privacy... Almost always the case ) is a Recall on this reduced brake power when the engine transmission... Always the case ) is a sign on the DIC, along with no traction and! Power '' have been having this same problem and this worked for me vehicles is when we are driving vehicles. Truck starts up there is a safety risk continues to lose power despite repairs most annoying things that happen. Hello, I have a GMC Sierra I am having issues with the throttle position sensor, circuit... Sustain long periods of vehicular operation power despite repairs s oxygen sensors measure the of. Has more than one possible root cause your experience, & to personalize content and ads I... 76Mm turbo please review our Privacy Policy pocket repair on this but I 'm also including the GMC Sierra has! My 2009 Silverado 1500 crew cab with 6.0 Liter the vehicle and let it sit, then restart its. We get the reduced engine power warning on the level freeway it’ll continue increasing no...

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