Powertrain
generic / SAE
P22AE
O2 Sensor Reference Voltage Circuit/Open (Bank 1 Sensor 2)
The reference voltage line for the wide-band O2 sensor on bank 1 sensor 2 is open. The reference is used as the floating mid-point for the pumping cell.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / AE
Possible causes
- Open reference voltage line high
- Pin pushed back out of connector body low
- Cracked solder joint inside the module or sensor low
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–500 €
- Estimated time: 0.5–2.5 h
- Component: oxygen sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012