P0132 — O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
Category: Powertrain Severity: Medium
Updated:
DTC code P0132 means: O2 Sensor Circuit High Voltage (Bank 1 Sensor 1). It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include contaminated or failed O2 sensor, signal wire shorted to the heater circuit and very rich mixture (leaking injector); it's worth confirming the diagnosis before replacing parts.
Possible causes
- Contaminated or failed O2 sensor
- Signal wire shorted to the heater circuit
- Very rich mixture (leaking injector)
- Burning coolant or oil
Symptoms
- Check engine light
- Black smoke
- Higher fuel consumption
- Fuel smell
How to diagnose it step by step
- Read fuel trims.
- Check injectors and fuel pressure if trims are negative.
- Inspect the sensor wiring.
- Replace the sensor if the mixture is correct.
How to fix it
Check whether the mixture is actually rich (negative fuel trims). If not, the sensor or its wiring is at fault.
Estimated repair cost
$100–300.
Frequently asked questions
What does DTC code P0132 mean?
O2 Sensor Circuit High Voltage (Bank 1 Sensor 1).
Is code P0132 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0132?
Short-term driving is OK; a prolonged rich mixture damages the catalyst.
Related codes
P0131 P0133 P0130 P0134 P0135 P0136 P0137 P0138 P0139 P0128
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