P2237

41E7 - P2237

Information saved in
DDE

Fault code
41E7 - P2237

Fault text
DDE: Oxygen sensor, signal, pump current: Open circuit

Fault description
An open circuit error is recognized in the pump current
when the filtered raw O2 signal from the sensor is less than
0 although no lean operation has been detected.

Condition for fault identification
Test condition:
Continuous, corresponding to the configured time grid.
The following conditions must be satisfied for an IP load
drop test:
The vehicle is not in trailing throttle/overrun, debounce
implemented with 100 ms and 100 ms.
- No rich-mixture operation detected.
- The O2 signal from the sensor is valid.
- No rich-mixture operation detected, meaning that for
longer than 2 s the calculated O2 value is above the limit 0.
The battery voltage is above 10700 mV, debounce
implemented with 0 ms and 2000 ms.
- No thermal particulate filter regeneration is present.
Voltage condition:
Continuous, corresponding to the configured time grid.
The following conditions must be satisfied for an IP load
drop test:
The vehicle is not in trailing throttle/overrun, debounce
implemented with 100 ms and 100 ms.
- No rich-mixture operation detected.
- The O2 signal from the sensor is valid.
- No rich-mixture operation detected, meaning that for
longer than 2 s the calculated O2 value is above the limit 0.
The battery voltage is above 10700 mV, debounce
implemented with 0 ms and 2000 ms.
- No thermal particulate filter regeneration is present.

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