939005180 - Y053 P0683 - PREHEATING CONTROL UNIT (FEEDBACK)

The diagnostic equipment signals: Error P0683 (pre-heating control unit (feedback)).
This error is detected if there is a problem in the pre-heating circuit.
1Check on operation of heater plugsALL OKPROBLEMS ENCOUNTEREDACTION
Check that the heater plugs are working properly, by carrying out the test    See Test 5520CA GLOW PLUGS FUNCTIONAL TESTEnd of diagnosis