Check the exhaust temperature sensor and electrical cables.Use the following options to verify that the fault has been rectified:Carry out the test "Devalidating fault codes for NOx control" which can be found under the Check tab in SDP3 to check that the fault has been rectified. The test should be carried out outdoors because the exhaust gases become very hot and there is a risk that the exhaust extractor hose will melt. The test may take between approximately 5 to 30 minutes to carry out, depending on which fault codes are active.Otherwise, carry out the following so that the control unit will devalidate the fault.Start the engine and make sure that the engine speed is above 1000 rpm and that the SCR system starts up. Repeat this four times in succession. If it is colder than -8°C or if the reductant is frozen, the SCR system will not start.If the fault has been rectified, the fault code becomes inactive. Clear the fault code.You can go into fault code monitoring and look at the fault code. There you can see whether the conditions under which the control unit verifies that the fault is rectified have been met. When the conditions have been met and the test is carried out, the fault code status is displayed during the test. If the fault code is pending, the control unit has detected a fault. If the fault has been rectified, the fault code becomes inactive and can be cleared.Switch the power off and on with the starter key three times in succession at 10 second intervals to extinguish the warning lamp.

Diagnostic depth