Fault Information


Fault Code Description
Plausibility check on the nitrogen oxide sensor downstream of the SCR catalytic converter (oxygen sensor signal) in coasting overrun mode. The fault is detected if the oxygen sensor signal exceeds a limit value.
Limit value: 0.23
Fault Code Conditions
General Conditions The vehicle is in sleep coasting/overrun mode.
Control unit voltage: 9.5 V to 16 V.
Terminal Condition

Driving Conditions
Fault Time Condition
The fault is entered if it is present for longer than the following period (debounce time): 50 ms
Service Plan
1. Check the nitrogen oxide sensor for dirt contamination and correct installation.
2. Check line and plug connections
3. Replace NOx sensor after SCR catalytic converter.
Fault Impact
None
Warnings
Warning Lights None
Control Center Messages
Service Notes
If a nitrogen oxide sensor is replaced, the following service function must be carried out: SCR system adjustments and adaptations, SCR exhaust emission sensor system.