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Home >> Chevrolet >> 2001 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 68 (Automatic Transmission Diagnosis - 4L80-E (Diesel)) >> Diagnostic Tests >> DTC P0722: OSS Sensor Circuit - Low Input >> Test Description

Test Description

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

The numbers listed below refer to step numbers in the diagnostic procedure:

  1. 2

    This step verifies the fault condition.

  2. 3

    This step tests sensor integrity.

  3. 9

    This step verifies power and ground to the VSS buffer module.

  4. 13

    This step verifies the PCM input controlled by the speed buffer.

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