Quote:
Originally Posted by Topless
Intake and exhaust leaks need to be fixed and your idle will smooth out. The codes listed are common for intake or exhaust leaks. The car is running lean.
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How does the ECU read an exhaust leak aft of the post cat O2 sensor? It seems to me that anything from that point back makes no difference to the ECU. If id does,please help me understand how leaky bypass pipes cause idling issues?