GT WITH ERROR CODE PO300

2003 Pontiac Grand Am

Tiny

samantha1122

September, 3, 2011 AT 8:47 AM

I have an 03 Grand Am with 51k miles that is giving an error code of PO300, random cylinder misfire. Changed plugs, plug wires, coil packs, and fuel injectors. What would be the next and easiest thing to try/change?

FOUND 187 RELATED QUESTIONS

P0300

13 ANSWERS

How To Fix Dtc P0101&p0300

2 ANSWERS
5 IMAGES

1 Answer

Tiny

KHLow2008

September, 3, 2011 AT 9:53 AM

Check the engine compression and fuel pressure.

Ensure exhaust is not restricted.

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