service engine light still remains on
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1998 Chevrolet Express 1500 Question: I have a dtc p0303. The spark plugs and wires has been changed what next?
Answer #1holston2008 September 28, 2012, 22:57Technician
check the compression on that cylinder and let me know what u find.
Answer #2pushrod September 29, 2012, 07:11Master
After repair the computer will have to be reset to turn off SEL. If you have done this and still have the same code may have an injector problem. Or as answer 1 said compression low.