Why does my GMC Sierra have reduced engine power?
Why does my GMC Sierra have reduced engine power?
Hello, I have a 2008 Gmc Sierra 2500HD Duramax Diesel with about 55,000 miles on it. 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.
Why does my GM car have a reduced engine power warning?
Some GM vehicles will enter Reduced Engine Power Mode when the engine begins to overheat due to cooling system issues. The PCM triggers the mode to protect the engine from further damage. In some instances, the Reduced Engine Power warning may illuminate to inform the driver that the vehicle lacks power due to an underlying condition.
Why does my Duramax say reduced engine power?
If you’ve got a Duramax diesel, the Reduced Engine Power warning could Illuminate for a variety of reasons. There are many different technical service bulletins (TSBs) for Duramax-powered vehicles that mention Engine Reduced Power mode.
What to do if your Chevy Silverado has reduced engine power?
After it has warmed up, turn on the A/C (if so equipped) in park for 10 seconds, leave the A/C on and put it in drive for 10 seconds, leave it in drive and turn the A/C off for 10 seconds, then put it in park and turn the vehicle off and you’re done! Restart and take it out for a drive to see how it runs.
Why does my Chevy 2500 have reduced engine power?
Video: Fixing a 2007 Chevy 2500 HD with a “Reduced engine power” message. Whenever possible, troubleshoot any suspect component or circuit to avoid unnecessary repairs. Throttle control systems are a common source of Reduced Engine Power issues. Photo courtesy of Musay16 on Wikimedia.
What’s the problem with my Silverado 2500 HD?
System Running Lean Bank 1, and Bank 2. My problem is a vacuum leak, and I finally found it on the air intake, right after the MAP sensor, where the rubber meets the plastic. Apparently, the intake was touching the engine, and slowly melted a flat spot on the underside. Good luck. I brought the truck to a shop and they replaced the throttle body.
Why does the reduced power light come on on my GMC Sierra?
This is one of the most common reasons the reduced engine power light comes on. 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.
Some GM vehicles will enter Reduced Engine Power Mode when the engine begins to overheat due to cooling system issues. The PCM triggers the mode to protect the engine from further damage. In some instances, the Reduced Engine Power warning may illuminate to inform the driver that the vehicle lacks power due to an underlying condition.
