While driving my 2007 GMC Yukon XL at highway speed, the engine light came on with these messages: (1) service Stabilitrack, (2) reduced engine power is reduced, and (3) service traction control. The truck drove terrible, I read this tread looking for help. Back story: Earlier this year when we were in the mountains the check engine light came on. Here are some of the most typical problems that can make your Acadia’s reduced engine power warning come on: This is one of the most common reasons the reduced engine power light comes on. Fix ! Now: Yesterday was -5 degrees in the … ... 2019 GMC Acadia SLT-1 3.6L LGX V6 - Build Date: 4-11-2019 - … Average repair cost is $7,700 at 71,200 miles. It is not meant to sustain long periods of vehicular operation. Guys this work with my acadia for some time but when I change the purge valve wish is connected with the throttle !! It is a complex system. This is great news, since it helps narrow down where the ECU thinks that the problem is. The code never cleared itself, and it hardly started once she got out of work to come home. When the engine power has been reduced, the engine and transmission can operate in totally different ways. Your Acadia’s oxygen sensors measure the amount of oxygen in the exhaust to help insure that the proper air/fuel mixture is realized. 2007 GMC Acadia SLT 120K Miles Issue started as Stabilitrak and traction control off.... did not indicate reduced engine power. Easy fix clean throttle and air that was it ! A few weeks ago had the Stabilitrak warning along with no traction control and reduced engine power. This leads to jerky shifts, unstable acceleration, and horrible gas mileage. The throttle position sensor is one of the most vital sensors in your Acadia. 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. Not being able to go 40MPH (which is almost always the case) is a safety risk. My car has 124555 miles. Loss of StabiliTrak is not really going to be noticed during normal driving. If it’s not responding, the ECU has no way of telling how much gas gas you’ve given it. Took it to the dealer the next day, they hooked it up to the computer and it showed there was a problem, but everything checked out okay. At this point, it turns on the reduced engine power mode in order to keep the vehicle from running away from you. "TRACTION CONTROL OFF", "SERVICE STABILITRAK" messages has been popping up in my 2008 Acadia since last few months. My car has an automatic transmission. Can … read more It is really only gets use in an emergency situation. If you have the reduced engine power light, then there are going to be some diagnostic trouble codes stored in your OBD II system. Another common cause of a reduced power condition is , if the ECU goes bad it can trigger the reduced engine power condition. I pulled over on the side of the highway coz everytime I pressed on the accelerator pedal, it slowed the acadia … Asking what engaged reduced engine power warning message is somewhat like asking what turned on your check engine light—there are too many possibilities to list. 👌😀 https://youtu.be/48Aa_49gYjwSave hundred of dollars by doing it your self !! Code reader shows po641 which is a 5 volt circuit reference. If you have the reduced engine power light, then there are going to be some diagnostic trouble codes stored in your OBD II system. Average failure mileage is 71,000 miles. I immediately pulled back into the mall parking lot and turned the engine off. is only 40 $ after that I had no problems with that again ! GMC Savana: Service StabiliTrak Causes. If i can do it you can do it !! - GMC 2009 Acadia question Before that, it was acting sluggish; hesitating, then jerking at take-off and RPMs fluctuating wildly while holding steady pressure on the gas pedal. I usually park and turn off the truck, after about five minutes I will restart it, and it is cleared although the service engine light stays on for a day or so, then goes off. Loss of StabiliTrak is not really going to be noticed during normal driving. The 2014 GMC Acadia has 19 NHTSA complaints for the electronic stability control at 48,360 miles average. If your Acadia has gotten this reduced engine power warning, it means that one of its engine management sensors or the ECU have gone bad. !Check the link !! 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, GMC Sierra:  Reduced Engine Power Diagnosis, GMC Terrain:  Reduced Engine Power Diagnosis, Chevy Impala: Brake Lights Stuck On → Diagnosis. 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