P300 CODE WON'T GO AWAY!!

2003 Saturn L300

Tiny

plinker4fun

May, 26, 2009 AT 6:48 PM

Engine Mechanical problem
2003 Saturn L300 6 cyl Two Wheel Drive Automatic 123000 miles

I have had a P300 code on my Saturn for awhile. I have had the spark plugs, ignition coil replaced. Just had the fuel injectors cleaned, replaced the oxygen sensor and it still will not go away? Any ideas. My trust in any mechanic is going down the drain with my wallet. Any help would be appreciate!

FOUND 1494 RELATED QUESTIONS

1 Answer

Tiny

rasmataz

May, 27, 2009 AT 4:59 AM

P0300 Random Misfire normally points to vacuum leaks and bad fuel

Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

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