Code B132, Engine Oil Pressure Sensor Circuit Faulty: Notes

The oil pressure indicator uses a variable resistor to control the signal voltage at the BCM. The BCM supplies and monitors a 5-volt signal on circuit No. 313 to the sensor. When the engine is not running (oil pressure low), sensor resistance is low and the signal voltage drops low when it returns through circuit No. 736. When the engine is running (increased oil pressure), sensor resistance becomes greater and monitored voltage is high on circuit No. 313.

Code B132 will set if the monitored voltage indicates oil pressure greater than 252 psi (18 kg/cm² ). As actual engine oil pressure will never be that high, the code indicates an open circuit, faulty sensor or faulty BCM.

1. BCM data value BD71 displays oil pressure. The normal range is from 0-80 psi.
2. Checks to see if the open circuit reading is due to the circuit or the sensor. If the open circuit reading changes to a shorted circuit reading after jumping the sensor terminals, the BCM and wiring are okay.
3. By applying a ground to various points in the circuits, an open can be isolated by observing whether the parameter display can be changed from the open reading to the shorted reading.