Powertrain
generic / SAE
P22B8
O2 Sensor Positive Current Control Circuit/Open (Bank 2 Sensor 2)
The positive (sourcing) side of the O2 sensor pumping current control circuit on bank 2 sensor 2 is open. Wide-band O2 sensors regulate oxygen concentration in a reference chamber by pumping current; the positive line is open here.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / B8
Possible causes
- Open positive current 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