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