P0132 Code: O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
🟠 Moderate severity · drivable
Drivable, but the engine may run rich and use more fuel. Fix it soon.
What P0132 means
The bank 1 upstream oxygen sensor is reporting very high voltage, which the computer reads as a rich mixture. This can be a genuinely rich engine or a sensor/circuit problem.
Symptoms
- Check engine light is on
- Poor fuel economy
- Fuel smell
- Black smoke from exhaust
Common causes
- most common: Faulty upstream oxygen sensor
- common: Leaking fuel injector or high fuel pressure (genuine rich)
- less common: Wiring shorted to power in the sensor circuit
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the bank 1 upstream oxygen sensor | Yes | $60–200 |
| Diagnose and fix a genuine rich condition (injector, fuel pressure) | Mechanic | $150–500 |
| Repair shorted sensor wiring | Mechanic | $50–150 |
Frequently asked questions
Can I drive with a P0132 code?
Yes, but the engine may run rich and waste fuel. Fix it soon.
What is the most common cause of P0132?
A faulty oxygen sensor reading high, though a genuine rich condition is also possible.
How much does it cost to fix a P0132?
$60–$200 for a new sensor, or more if a fuel injector or pressure problem is the cause.
Related codes
P0131
P0131 Code: O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0133P0133 Code: O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
P0172P0172 Code: System Too Rich (Bank 1)
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.