Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

3) - This step will help determine if the 5 volt reference circuit is open.
4) - This step will help determine if the sensor return circuit is open.
5) - Test for the proper operation of the phase A circuit.
7) - Test for the proper operation of the phase B circuit.
9) - Test for the proper operation of the marker pulse circuit.
11) - Test for the proper operation of the sensor signal circuit.
14) - Test for a short to ground in the 5 volt reference circuit.

Fig 1: DTC C0455 Diagnosis (Steps 1-5)

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Fig 2: DTC C0455 Diagnosis (Steps 6-17)

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Fig 3: DTC C0455 Diagnosis (Steps 18-25)

Courtesy of GENERAL MOTORS CORP.