OBD-II code · Powertrain (generic)
P0164 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3)
The ECU detects abnormally low voltage from the third O2 sensor on bank 2. Indicates lean exhaust, open sensor or wiring shorted to ground.
Is it safe to drive with P0164?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyLean exhaust condition
- PossibleO2 sensor failed
- Less likelyConnector pins corroded - high contact resistance
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 B2s3, Oxygen Sensor Wiring
Related codes
- P0144O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)
- P0157O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
- P0158O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
- P0161O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 2)
- P0162O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)
- P0163O2 Sensor Circuit Malfunction (Bank 2 Sensor 3)
- P0165O2 Sensor Circuit High Voltage (Bank 2 Sensor 3)
- P0166O2 Sensor Circuit No Activity / Slow Response (Bank 2 Sensor 3)
- P0167O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 3)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.