Powertrain
generic / SAE
P2AAB
Engine Coolant Bypass Valve B Position Sensor Circuit Intermittent/Erratic
The engine coolant bypass valve B position sensor signal drops out or jumps intermittently. Loose connector or noisy ground.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / AB
Possible causes
- Sensor connector not seated high
- Noisy ground reference medium
- Connector with intermittent contact under vibration low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 150–700 €
- Estimated time: 0.5–3 h
- Component: engine coolant bypass valve b position sensor
- Component: wiring harness
- Component: ecm
- MIL / check engine light
Sources
References
sae:J2012