Question about 2007 Ford Mustang GT California Special Convertible
Po420 bank 1 and po430 bank 2 error codes caused a failed inspection
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Posted on Jan 02, 2017
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hi,my friend, you can try,
Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
Inspect the downstream heated oxygen sensor (HO2), replace if necessary
Replace the catalytic converter
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