Exhaust temperature sensor before SCR catalytic converter
Check the exhaust temperature sensor and electrical cables.Disconnect the sensor and measure the resistance. At a temperature of 10-30°C, the resistance should be 207-222 ohms.Proceed as follows to verify that the fault has been rectified:Switch off the power with the starter key, wait for at least 90 seconds and switch on the power with the starter key again. If the fault has been rectified, the fault code becomes inactive. Clear the fault code.Switch the power off and on with the starter key three times in succession at 10 second intervals to extinguish the warning lamp.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
The voltage in the circuit has been outside the permitted range.
Open circuit in the temperature sensor circuit before the catalytic converter.