OBD-II code · Powertrain (generic)
P0132 O2 Sensor Circuit High Voltage (Bank 1, Sensor 1)
The upstream oxygen sensor signal is fixed at a high voltage, indicating either a continuously rich exhaust on bank 1 or a short to supply voltage in the signal circuit.
Is it safe to drive with P0132?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyGenuine rich running (leaking injector, high fuel pressure)
- PossibleSignal wire shorted to supply voltage
- Less likelySensor poisoned by silicone or coolant
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Oxygen Sensor Upstream, Fuel Injector, Fuel Pressure Regulator
Related codes
- P0138O2 Sensor Circuit High Voltage (Bank 1, Sensor 2)
- P0152O2 Sensor Circuit High Voltage (Bank 2, Sensor 1)
- P012FEngine Coolant Temperature / Engine Oil Temperature Correlation
- P0130O2 Sensor Circuit Malfunction (Bank 1, Sensor 1)
- P0131O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1)
- P0133O2 Sensor Slow Response (Bank 1, Sensor 1)
- P0134O2 Sensor Circuit No Activity / Slow Response (Bank 1 Sensor 1)
- P0135O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.