P0430
P0430TWC Conversion, Bank 2 - Above Limit
Diagnostic conditions
- Battery positive voltage between 10 V and 16 V
- Temperature at engine start-up greater than -15 °C
- Time elapsed after engine start-up greater than 10 seconds
- TWC temperature between 400 °C and 720 °C
- 60-second journey within load between 22 and 46 %
- EVAP canister burden less than 8
- Engine speed between 1200 1/min and 2600 1/min
- Oxygen sensing ahead of TWC is active
- Oxygen sensing after TWC ready for operation
- No additional mixture faults in memory
Possible cause of fault
- Oxygen sensor ahead of catalytic converter and oxygen sensor after catalytic converter exchanged
- TWC faulty
Affected pins
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Diagnosis/troubleshooting
NOTE: Do not use contact spray on the oxygen sensor plug connections as this may cause irreparable damage to the wiring (blocking of reference air channels).
NOTE: Do not confuse oxygen sensor ahead of catalytic converter and oxygen sensor behind catalytic converter as this will cause implausible fault entries.
Distinguishing feature of both sensors:
Oxygen sensor ahead of catalytic converter (LSU) has a 6-pole connector
Oxygen sensor behind catalytic converter (LSF) has a 4-pole connector
NOTE: The diagnostic conditions can also be 'forced' by performing the "TWC Conversion" short test using the Porsche System Tester II No. 9588.
