P0030

P0030

Diagnosis information - DME V8 DFI

Driver for oxygen sensor heater ahead of catalytic converter, bank 1

NOTE: Do not use contact spray on the oxygen sensor plug connections, as this may cause irreparable damage to the wiring (blocking the 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.

Diagnostic conditions
- Vehicle voltage > 9 V
- Engine running > 10 seconds
- Oxygen sensor heater ahead of catalytic converter active

Possible fault causes
- Short circuit to B+
- Short circuit to ground
- Open circuit in line
- Fuse FE 17 faulty (fuse carrier in plenum panel E-box)
- Loose contact in connector
- Oxygen sensor faulty

Affected contacts on the DME control unit connector
Connector [A]:
- Contact 33

Affected contacts on the oxygen sensor connector ahead of catalytic converter, bank 1:
- Contact 3