3360372 - Z72 SPEED SENSORS ERROR PLAUSIBILITY ERROR AND SIMULTANEOUS DELTA 6 ERROR

The diagnostic equipment signals one or more of the following errors: C1201 ADX speed sensor, plausibility error, C1206 ASX speed sensor, plausibility error, C1211 PDX speed sensor, plausibility error and/or C1216 PSX speed sensor, plausibility error and it simultaneously signals error C1500 LAMBDA 6 error (different wheel speeds)
This error is signalled if the control unit detects that the speed of one of the wheels (transmitted by the sensor) differs by more than 6 km/h from that of one of the others. This happens if the magnetic wheel is not correct or damaged, if there are impurities in the gap, the sensor is not correctly fitted or the signal incorrect.
Results of the tests
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment and, in the PARAMETERS ambient, display the wheel speeds.With the vehicle raised on a lift, rotate the wheels manually and check that the wheel speed signal varies using the diagnostic equipment.Continue to Step 3One or more wheels do not signal the correct speed variation. Carry out the checks on the wheel in questionContinue to Step 2
2SENSOR CHECKAll OKProblems metOperation
Visually inspect the state of the sensors involved (front and/or rear, right and/or left).

In particular, check:

  • that there are no metal shavings in the magnetic tracks for the flywheels
  • that the sensor has been correctly fitted
  • that the sensor does not show signs of abrasion or distortion
Continue to Step 3Metal shavings present Clean the flywheel track
Sensor incorrectly fitted Refit correctly
Left front sensor faulty Replace the sensor Op.   3340A26 
Right front sensor faulty Replace the sensor Op.   3340A28 
Left rear sensor faulty Replace the sensor Op.   3340A35 
Right rear sensor faulty Replace the sensor Op.   3340A37 
3CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Delete the errors using the diagnostic equipment.Carry out road See Test   3340A  ABS intervention check , See Test   3340A  ABS intervention check and See Test   3340A  ABS intervention check in order to make the control unit check whether there are still errors present. Return to the workshop and check that the fault is no longer present using the diagnostic equipment.End of diagnosisThe fault persists Continue to Step 1