OBD-II code · Powertrain (generic)
P0153 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)
The ECU detects an abnormally high voltage from the upstream O2 sensor on bank 2. Indicates persistently rich exhaust, shorted sensor or wiring shorted to voltage.
Is it safe to drive with P0153?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBank 2 running rich (leaking injector, high fuel pressure)
- PossibleSignal wire shorted to voltage
- PossibleUpstream O2 sensor failed
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Oxygen Sensor B2s1, Oxygen Sensor Wiring, Fuel Injector Bank2
Related codes
- P0139O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
- P0145O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)
- P0159O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)
- P0165O2 Sensor Circuit High Voltage (Bank 2 Sensor 3)
- P0150O2 Sensor Circuit Malfunction (Bank 2, Sensor 1)
- P0151O2 Sensor Circuit Low Voltage (Bank 2, Sensor 1)
- P0152O2 Sensor Circuit High Voltage (Bank 2, Sensor 1)
- P0154O2 Sensor Circuit No Activity / Slow Response (Bank 2 Sensor 1)
- P0155O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)
- P0156O2 Sensor Circuit Malfunction (Bank 2, Sensor 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.