OBD-II code · Powertrain (generic, extended)
P2247 O2 Sensor Reference Voltage Circuit (Bank 2 Sensor 1)
Bank 2 counterpart of P2243. Reference voltage on the bank 2 sensor 1 wide-band probe is missing or out of tolerance.
Is it safe to drive with P2247?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyReference voltage line open on bank 2
- PossibleBank 2 wide-band sensor failed
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
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Oxygen Sensor Wideband, Oxygen Sensor Wiring
Related codes
- P2243O2 Sensor Reference Voltage Circuit (Bank 1 Sensor 1)
- P2244O2 Sensor Reference Voltage Circuit Range/Performance (Bank 1 Sensor 1)
- P2245O2 Sensor Reference Voltage Circuit Low (Bank 1 Sensor 1)
- P2246O2 Sensor Reference Voltage Circuit High (Bank 1 Sensor 1)
- P2248O2 Sensor Reference Voltage Circuit Range/Performance (Bank 2 Sensor 1)
- P2249O2 Sensor Reference Voltage Circuit Low (Bank 2 Sensor 1)
- P224ANOx Sensor Heater Resistance (Bank 1 Sensor 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.