P22ABO2 Sensor Positive Current Control Circuit/Open (Bank 1 Sensor 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P22AB reports a break in the positive current control line of a wide-band probe mounted behind the catalyst or, on diesels, further down the aftertreatment on bank 1. On a Bosch-style five-wire probe this is the pump-current lead (IP/APE) through which the controller moves oxygen into or out of the pump cell. Chrysler lists the code for 2010-2012 Ram 2500/3500 pickups with the 6.7 Cummins in bulletins 25-004-12 and 25-002-14; the prescribed fix is new sensor connectors or an overlay harness before any sensor is replaced. GM names it in 21-NA-149 among faults from chafed harnesses on the 3.0 Duramax LM2. P22AC/P22AD cover low/high, P22B8 is bank 2, P2237 the upstream twin. The warning lamp comes on; the engine usually runs normally.
- What you may notice
- Check engine light
- Downstream oxygen reading frozen or missing in live data
- Related catalyst or aftertreatment monitors stay incomplete
- Likely causes
- LikelyCorroded, loose or poorly crimped terminal in the sensor or sensor-module connector
- PossiblePump-current wire broken or chafed through along the exhaust
- PossibleInternal open circuit in the downstream wide-band sensor
- 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.