P22AEO2 Sensor Reference Voltage 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
- P22AE points to an open reference voltage line of the bank 1 downstream wide-band probe, i.e. the lead of the Nernst (sensing) cell, called RE/UN by Bosch and VS by NTK. Through it the controller reads the cell voltage it regulates the pump current against, so a break leaves the oxygen value meaningless. Chrysler lists P22AE for 2010-2012 Ram 2500/3500 with the 6.7 Cummins; bulletin 25-003-13 found tin instead of gold terminals in five cavities of the 2011 sensor-module connector. For the upstream twin P2243, Ford, GM and Saab declare an open when the sensor voltage leaves 0.2-4.7 V and, at GM/Saab, the cell resistance exceeds 570 ohms. P22AF, P22B0 and P22B1 are performance/low/high, P22BB is bank 2. The lamp comes on.
- What you may notice
- Check engine light
- Downstream oxygen or lambda value invalid in live data
- Other downstream sensor codes may be stored at the same time
- Likely causes
- LikelyCorroded or wrongly plated terminals in the sensor or sensor-module connector
- PossibleBroken Nernst-cell wire in the harness
- PossibleCracked or aged sensing cell with very high internal resistance
- 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.