O2 Sensor Circuit High Voltage (Bank 1, Sensor 1)

Where it lives

For P0132, the circuit described runs through the sensor. The description of P0132 puts it on bank 1.

Check these first

• Faulty oxygen sensor stuck at a rich voltage
• Shorted signal wire to voltage
• Rich fuel mixture from fuel pressure or injector faults
• Sensor contaminated or damaged

What to do next

1. Watch sensor voltage while commanding fuel changes
2. Check fuel pressure and trim for a real rich condition
3. Test the signal circuit for short-to-voltage
4. Replace the sensor if stuck regardless of fuel changes
5. Re-check trims after replacing the sensor

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