Engine reduce power


Asked by Aug 09, 2017 at 10:38 PM

Question type: Maintenance & Repair

I just bought my 08 G6 "used" and it was working
fine until today. Out of nowhere I got a engine
reduce power warning on my screen and I noticed
my coolant gauge was getting hot to quick I put
more antifreeze in it and still does this. The engine
fan even comes on. What could be the problem &
can the computer itself be misreading things?

5 Answers


Power is probably reduced to save your overheating engine from self destructing. Probably time for a cooling system service.


Does it mean my engine is bad? It sounds good when I start it up & drive until the gauge goes up quickly & how much are cooling system service "thanks for your reply"

1 people found this helpful.

I don't think your engine is bad. Worst case is probably a bad head gasket. Just have the hoses and thermostat changed, the engine and radiator flushed and new coolant. Make sure the cooling fan is working.

1 people found this helpful.

Sounds good. I'll give it a try and the fan works. It comes on everytime the engine reduces power. Do you know how much it would be to get a new head gasket, Change hoses, and to flush the system ?


Don't assume the head gaskets are an issue. I just mention them as they can be a cause of overheating. Check your oil for coolant and the coolant for oil as these are signs of leaking head gasket(s).

Your Answer:

Maintenance & Repair Experts

  • #1
  • #2
  • #3
View All

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.