Mechanics

CODE PO300 TRIED TO FIX

2003 Nissan Sentra • 179,000 miles

I have the code po300 and ive tried to fix it and spending countless money on parts I don't need cause its not helping the misfire issue need help

replaced the wire set and cleaned all the sensors and everything but the problem is still there?
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Brookmiller
October 11, 2012.




Random multi cylinder misfire. May be a coil problem, plugs, egr valve vacuum leaks I would try and get a run on an engine oscilloscope, this will help nail down the exact cause of this problem.

Mhpautos
Oct 11, 2012.


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