Engine power reduced or reduced engine power on dash instrument panel.

2009 CHEVROLET COBALT
270,000 MILES • 2.2L • 4 CYL • 2WD • AUTOMATIC
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ANDREA.SPARKA
  • MEMBER
  • 1 POST
Engine power reduced or reduced engine power on dash instrument panel. I had my valve cover gasket replaced yesterday and my mechanic also reset something to do with my gas pedal. Not sure exactly what it was called. Anyways that was yesterday and so today I was on the interstate one mile from where I was headed and suddenly my car started slowing down. It lost power and would not accelerate. The dash instrument panel says engine power reduced or reduced engine power. I know nothing about vehicles but could this have been a result of either of the things that was done to my car yesterday (valve cover Hadley getting changed or resetting something to do with my gas pedal)? Please help me. I turned my car off and tried to restart it but it wouldn’t stay started it died out three times and it wouldn’t go anywhere before I turned the car off. What I’m saying is the car was driving fine on the interstate. All of a sudden the car started like slowing down lost power and the dash said engine power reduced. I turned the car off and then it wouldn’t turn back on or it did it back but it died like three times
Sep 4, 2025 at 10:35 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
Yep, this happens when the car goes into limp mode, it sounds like the throttle bore or the accelerator pedal position sensor has gone bad. I would runt he codes or go by the auto part store to have them run the codes, (if you can get it there). If not you will need a scanner. Here is one for $24.00 bucks

https://amzn.to/484V5Y9

This will tell us which part is bad and then you can just swap it out which is easy. Let us know how it goes

Sep 5, 2025 at 5:33 PM
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