Fault Information

Fault Code Description
Plausibility check on the nitrogen oxide sensor downstream of the SCR catalytic converter. The system waits for sufficiently large NOx peaks upstream of the SCR catalytic converter before performing the plausibility check on the nitrogen oxide sensor downstream of the SCR catalytic converter. The fault is detected if the change in the sensor signal does not reach an operating-point-dependent limit value.

Fault Code Description

Plausibility check on the nitrogen oxide sensor downstream of the SCR catalytic converter. The system waits for sufficiently large NOx peaks upstream of the SCR catalytic converter before performing the plausibility check on the nitrogen oxide sensor downstream of the SCR catalytic converter.
The fault is detected if the change in the sensor signal does not reach an operating-point-dependent limit value.

Fault Code Conditions
General Conditions	Control unit voltage: 9.5 V to 16 V.
Terminal Condition
Driving Conditions

Fault Time Condition
The fault is entered if it has been detected more than the following number of times (fault debouncing counter): 65535

Service Plan
1. Check line and plug connections 2. If wires and plug connections are OK: Replace nitrogen oxide 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. The fault cannot be deleted until the DDE has detected a functioning SCR system. For this purpose, complete a conditioning run until the Check Control message goes out. The fault memory can then be deleted.