Troubleshooting Fault Codes P0421 & P0431
#1
Troubleshooting Fault Codes P0421 & P0431
Inspection is due this coming weekend. My catalytic converter is giving the Efficiency Below Threshold Fault Code, but I strongly believe the Catalytic Converter Fault Code is a False Positive.
I'm noticing that the engine fault codes P0421 & P0431 appear before the Misfires are detected by the ECU.
Please let me know which further information should be posted here for further analysis and discussion. Thank you.
I'm noticing that the engine fault codes P0421 & P0431 appear before the Misfires are detected by the ECU.
Please let me know which further information should be posted here for further analysis and discussion. Thank you.
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sanchius
12v V6 Discussion
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01-17-2008 09:19 AM