Pesky PO420 Codes - Eastern Catalytic
www.easterncatalytic.com/education/tech-tips/pesky-p0420-codes/
One of the most annoying is the persistent PO420 diagnostic code (Catalyst System ... not only shows its teeth when the catalytic converter is on the blink, but can also be ... Most, if not all, catalytic converter failures are caused by a problem or ...
P0420 Error Code: Catalyst System Efficiency Below ...
www.obd-codes.com/p0420
Repair information for the OBD-II trouble code P0420 - Catalyst System Efficiency ... If they have failed, it is likely due to something else that caused it to fail. ... the catalytic converter is broken or failed, it may be restricting the exhaust which will ...
explaining trouble codes po420 - po421 - Discount Catalytic ...
Trouble Code: P1113
O2 Control (Bank 1 Sensor 1) Internal Resistance Too High
Possible Causes:
Oxygen sensor (before catalytic converter) is faulty.
Oxygen sensor (behind catalytic converter) is faulty.
Oxygen sensor heater (before catalytic converter) is faulty.
Oxygen sensor heater (behind catalytic converter) is faulty.
Circuit wiring has a short to power or ground.
Engine Component Power Supply Relay is faulty .
E-box fuses for oxygen sensor are faulty .
Leaks present in the exhaust manifold or exhaust pipes.
HO2S signal wire and ground wire crossed in connector .
HO2S element is fuel contaminated or has failed.
ECM has failed .Here is what is listed.
P0431 Warm up catalytic converter, bank 2 - efficiency below threshold
Possible causes: Catalytic converter, wiring, HO2S 2
Usually caused by worn out catalytic converter, but always check fuel pressure regulator for proper operation before replacing a converter.
P0446 Evaporative emission (EVAP) system, vent control -circuit malfunction
Possible causes: Wiring, EVAP canister purge valve, ECM
May be caused by a loose or disconnected wire to the vent valve or possibly a bad valve solenoid
If you would like part locations, troubleshooting or replacement procedures, please let me know.
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