help with p0420 code
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help with p0420 code
2k miles ago had p0116 and p0117 come up replaced o2 on the head and check engine light went away now i have p0420 code and have read a lot of diagnostic solutions not sure if i should replace cat or o2 on cat? also srs light on 1k mile ago
Joined: Nov 2012
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Re: help with p0420 code
Check for exhaust leaks first, then test the o2 sensor.
http://www.p0420.com/
http://www.aa1car.com/library/p0420_dtc.htm
http://www.p0420.com/
http://www.aa1car.com/library/p0420_dtc.htm
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