Service engine soon light is on, when i give it gas or go up a hill the light flashes and it runs ruff and looses power

Asked by Jan 18, 2017 at 10:30 PM about the 2000 Pontiac Grand Am SE1

Question type: Maintenance & Repair

3 Answers


Because it's setting the code under those circumstances. Take it up to an auto parts store, they can read the codes for you. (or you can pay to have a mechanic or dealership do it). You can also buy an OBDII scan tool, the better ones will let you monitor codes as they happen while you're driving.

1 of 1 people found this helpful.

A flashing service engine soon light is warning you that the engine is misfiring and damaging the catalytic converter. Since it's misfiring under load that points to either you need a tune up, or an ignition coil pack is failing. If it turns out to be a failing coil pack, replace all 3. If one is bad, the other two are soon to follow. HTH. - Jim

1 of 1 people found this helpful.

Also this happened when a crankshaft/camshaft sensor started to fail. Try to find out the code.

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