Code P132, Knock Sensor Circuit Failure: Action

PCM turns on MIL.

1. Checks if Code P035 is also present. A REF LO problem can cause other ignition problems.
2. Checks for proper operating voltage of 0.3-4.2 volts at PCM terminal 1A13.
3. Checks circuit No. 496 for short to ground. If circuit is okay, sensor is faulty.
4. Checks for short to voltage in circuit No. 496.
5. Checks circuit No. 496 for open.

Fig 1: Code P132 Schematic, Knock Sensor Circuit Failure

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code P132 Diagnostic Flow Chart, Knock Sensor Circuit Failure

Courtesy of GENERAL MOTORS CORP.