P2238

49EF - P2238

Information saved in
DDE

Fault code
49EF - P2238

Fault text
DDE: Oxygen sensor, signal pump current, Nernst voltage
or virtual mass: Short circuit to ground

Fault description
The DDE recognizes a short to ground at the output stage:
Oxygen sensor wiring.

Condition for fault identification
Test condition:
The following conditions must be met for the error check:
- No internal errors may be present in the output stage.
- The open-circuit diagnosis is not active.
Voltage condition:
The following conditions must be met for the error check:
- No internal errors may be present in the output stage.
- The open-circuit diagnosis is not active.

Condition for fault memory entry
Debounce (2000 ms)

Action in service
1. Check wires and plug connections.
2. If wiring and plug connections are OK:
Replace oxygen sensor.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none