2. Trouble Codes Related to Reduced Engine Power. I had the famous "Reduced Engine Power" message this weekend. What I’ve Read; About Scott I changed the throttle position sensor first. 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. These codes point to issues with the throttle position or pedal position sensor, or circuit. no codes. I was towing our camper home from a trip. This actuator assembly needs a corolation signal from the gas pedal sensor to operate properly. Ok I had the same issue with reduced engine power code and car shutting down while driving. The reduced engine power light is most likely setting the stabilitrack light to come on. 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. To start viewing messages, select the forum that you want to visit from the selection 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. Advertisement. You may have to register before you can post: click the register link above to proceed. Unfortunately couldn't get the sensor by itself had to buy entire assembly (took me 15minutes). I'm new to diesel's so I did some research on here, and it seemed the air/fuel filter, or MAF would be the first thing to check. Parked in the driveway to unload the trailer. Modern vehicles which use this feature are pre-programmed to limit the performance of the vehicle to prevent further damage. The Marketing Tactician. Typically, the “engine power reduced” warning light on your dash means that your vehicle’s performance has been reduced to avoid damaging its engine. SaaS Marketing for Product Development Teams Menu Close Home; Marketing Method; Insights Open menu. The computer in your car, also known as its “electronic control unit” (ECU) has triggered the Reduced Power Mode after it … Is there a way to just disable Reduced Engine Power mode? When specific faults are detected electronically, the engine control module begins the process of limiting vehicle speed, gear range, and engine power. The reduced engine power light is normally set when the computer senses an issue with the throttle actuator assembly. Reduced engine power driving is not cool! Iowa: Started up my truck this morning and let it idle for about 5 minutes (since it was 3 degrees out) while I fed the dogs and took out the trash.Got in it made it half a mile down the road and the check engine light comes on and a warning message that said "Reduced Engine Power" I turned around headed back home parked it and hopped in a different vehicle. Once I start it back up it accelerates very slow even when mashing in gas pedal. yea that's the one. Wondering if there is a way to reset it till I can get to the dealer in the morning. P1125. Posted 1/14/2013 18:54 (#2822588 - in reply to #2822403) Subject: Re: 2008 Duramax (reduced engine power) HELP: On mine you could turn the key off and on 3 times and reset things. If this is your first visit, be sure to check out the FAQ by clicking the link above. What Does the ‘Reduced Engine Power’ Warning Light Mean? Went to move the trailer to the back of the house and got the message. i only mentioned this because i had a customer come in after being deleted, was going into reduced engine power. The computer senses an issue with the throttle actuator assembly needs a signal... Entire assembly ( took me 15minutes ) 15minutes ) you may have to register you... Select the forum that you want to visit from the gas pedal n't get the sensor itself! 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