Test Description

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

1. 2. This step determines if DTC P0228 is a hard failure or an intermittent condition.
2. 5. This step checks for an open in the ground circuit.
3. 8. This step checks for a short to power or a bad APP module.

Fig 1: DTC P0228 (Steps 1-4)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P0228 (Steps 5-15)

Courtesy of GENERAL MOTORS CORP.