Reduced Engine Power light and trouble codes P1125 and P2138


Asked by Rhonda Mar 16, 2019 at 02:33 PM about the Pontiac Grand Prix

Question type: Maintenance & Repair

I was driving up a steep bridge and all the sudden a light came on that said
Reduced Engine Power and I no longer could drive over 30 mph took it to
auto parts and they scanned the trouble codes P1125 and P2138 came back
the vehicle is able to drive over 30 mph if I let off the gas pedal and press it
again it will gain speed and drive fine until I come to a stop light or sign and
then it won't go over 30 mph until I let off the gas pedal again and then press
it again. What could cause this? Is there an inexpensive way to fix it because
I am practically broke till next Friday?

3 Answers


Did you google the trouble codes to see what they are for?

1 people found this helpful.

Hey I have a 07 Pontiac Grand Prix I have fix the throttle pedal position sensor and this morning my engine light came on can you tell me why


It's an older car, so it could be a new problem unrelated to the work you've just done. First thing as always is to scan for trouble codes. If you just did the throttle position sensor there's also a faint possibility that the car's computer is relearning something and the light may go off on its own. You might try simply driving it for a few days and see if it goes off on its own.

Your Answer:

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