P2240O2 Sensor Positive Current Control 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
- P2240 is the open pump-current circuit of the front wide-band sensor on bank 2, so it only exists on V engines and boxers. Ford's summaries (2012 and 2020-2023) introduced it to replace P0154; detection works as on bank 1, by lambda failing to react to reference-current pulses or by the NTK interface chip. VW's 2014 Touareg and CC books flag 1.49-1.51 V combined with a lambda controller offset above 0.07 or a controller at its limit. GM's 2005 V6 adds a fuel cut-off test (signal below 1.7 V for 2 s). FCA reflashes the PCM for P2240 on the 2025 Ram 1500 and Wagoneer with the 3.0 Hurricane (bulletins 18-071-26, 18-082/083-26), and Jaguar Land Rover lists it among the 3.0 V6 sensor faults caused by water shock.
- What you may notice
- Check engine light
- Bank 2 lambda value stuck at 1.0 in live data
- Higher fuel consumption
- Likely causes
- LikelyOpen pump-current wire or loose pin at the bank 2 sensor connector
- PossibleBank 2 front sensor damaged by water or thermal shock
- RarePCM calibration that sets the code without a hardware fault (FCA 2025 Hurricane)
- 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.