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Chevrolet Camaro 6.2L 2SS Automatic - OBD2 Codes P0420 and P0430 After Installing Mufflers

Model: chevy camaro Fault Code: P0420 Posted: 2016-06-06 17:35

Hi everyone, I recently installed long tubes and replaced all exhaust pipes with mufflers on my 201x Chevrolet Camaro 6.2L 2SS automatic. Since then, the vehicle has started triggering OBD2 diagnostic codes P0420 and P0430. I'm not sure if this is related to the exhaust modifications. Can anyone advise what steps I should take to diagnose or fix these issues? The car runs normally, but the check engine light is on.

Related fault codes

P0420P0430

Comments (2)

Anonymous 2016-06-06 17:39

Hi, I'm also getting P0420 and P0430 codes. Any suggestions for troubleshooting this issue on a Chevrolet Camaro with an automatic transmission? What could be causing it after exhaust modifications?

Anonymous 2016-06-06 18:03

Have you removed the catalytic converters? Please check the oxygen sensor voltages before and after the catalytic converter. Also, refer to official OBD2 code references: http://www.obd-codes.com/p0420 and http://www.obd-codes.com/p0430 for detailed explanations of P0420 and P0430.