Powertrain
generic / SAE
P2B8B
Intake Air O2 Sensor Heater Control Circuit/Open Bank 1
The control circuit for the intake air O2 sensor heater on bank 1 is open. Sensor cannot reach operating temperature.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberB / 8B
Possible causes
- Open in heater control wire high
- Open heater element medium
- Pin pushed back out of connector body low
Symptoms
- Check engine light on after several drive cycles
- Slightly increased fuel consumption during cold start
- Delayed entry into closed-loop fuel control
- Failed emissions inspection (lambda readiness)
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 150–800 €
- Estimated time: 0.5–3 h
- Component: intake air o2 sensor b1
- Component: intake air o2 sensor heater b1
- Component: wiring harness
- Component: ecm
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012