P2247O2 Sensor Reference Voltage Circuit/Open (Bank 2 Sensor 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2247 is the bank 2 version of P2243: the Nernst-cell reference line of the upstream wide-band sensor on the second cylinder bank is open. Ford's summaries trip it on Bosch sensors after 10 s outside 0.2-4.7 V and on NTK sensors via the interface chip, replacing the older P0150. VW's 2014 Touareg book names it an open Nernst-voltage circuit with limits of 0.25 and 4.80 V, while GM's 2005 V6 tables call it Type B. Field cases include Honda bulletin 14-002 (2010-11 V6 models, broken sensor tip, usually with P0430), Jaguar Land Rover LTB00671 (2014-16 3.0 supercharged V6, water shock) and a 2025 Ram 1500 3.0 engine software update (FCA 18-071-26). P2243 is bank 1, P2249/P2250 the low/high faults, P2254 the open ground line on bank 2.
- What you may notice
- Check engine light
- Higher fuel consumption from open-loop fuelling on bank 2
- Catalyst efficiency code P0430 if a sensor fragment damaged the converter
- Likely causes
- LikelyBroken reference voltage (Nernst cell) wire or loose pin on the bank 2 sensor
- PossibleCracked element or broken sensor tip after thermal shock
- RareEngine software that sets the code falsely (update for some models)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.