Quote:
Originally Posted by JohnVT
hmmm... today the CEL went on, P0301 code. Finally some evidence that points somewhere ->engine misfire. Now to go dig into that!
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Since the plugs were already replaced, it could be due to a bad ignition coil. You can swap the coil with another cylinder and erase the codes. If the code resets on the other cylinder, then you know it the coil, itself. If not, you'll have to look for a possibly injector or mechanical issue.