Note On Intermittents

PCM Code P032 can be set by an open 5-volt reference signal between PCM and sensor, an open MAP signal between sensor and PCM or a defective MAP sensor. Manipulate affected wiring and connectors while observing PCM parameter PD02. Apply and release vacuum to MAP sensor vacuum port using a vacuum source. If PCM parameter PD02 displays less than 15 kPa, condition has been induced and cause of intermittent can be repaired. If wiring and connectors are okay, substitute a known good sensor, and retest.

Fig 1: PCM Code P032 Schematic - Open MAP Sensor Circuit

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code P032 Flow Chart - Open MAP Sensor Circuit

Courtesy of GENERAL MOTORS CORP.