Code B132, Engine Oil Pressure Sensor Circuit Faulty: Notes

The oil pressure indicator is a variable resistor used to indicate oil pressure to BCM. The BCM supplies voltage on circuit No. 313 to sensor. When the engine is not running (oil pressure low), sensor resistance is low. When the engine is running (increased oil pressure), sensor resistance becomes high. The signal voltage will vary between 5 volts (open circuit) and zero volts (short circuit).

Code 132 will set if engine is running and the signal voltage indicates greater than 80 psi for at least 2 seconds. As actual engine oil pressure will never be that high, code indicates an open circuit, faulty sensor or faulty BCM.

1. Checks to see if open circuit reading is due to circuit or sensor. If open circuit reading changes to a shorted circuit reading after jumping sensor terminals, BCM and wiring are okay.
2. By applying a ground to various points in the circuits, an open can be isolated by observing whether the parameter display changes to a short circuit reading.