Check engine light

25

Asked by Dec 07, 2014 at 04:32 AM about the 2008 Pontiac Grand Prix Base

Question type: Maintenance & Repair

When I go over 80mph my check engine
light comes on....  Why?

2 Answers

12,250

How long does it take the light to reset itself ? Could be the Oxygen sensor is going bad ... easy fix

1 people found this helpful.
35,355

The Why can be answered by scanning the trouble code that is being set, any of the auto parts stores will do a free scan for you. They also sell the scan tool (OBD - OBD III) for reading those codes as well.

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