Fault code: 42256 SCANIA

Error identification:

The SCR system has been switched off.

Cause:

The SCR system has been shut down due to the temperature in the main unit becoming too high.

Notes:

If the temperature falls to a permitted level, the SCR system will restart.

Action:

Check for any other fault codes that have been generated which may have caused this fault code, and troubleshoot via these.

To verify that the fault has been rectified and that the fault code does not recur, you can click on fault code monitoring and look at the fault code. This fault code is not activated immediately. In order for the control unit to set an active fault code, the fault must occur in four consecutive cycles, i.e. the power must be turned off and on four times with the starter key. You can use fault code monitoring to see whether the fault code is pending, i.e. the fault code is about to be generated.