Chassis
generic / SAE
C057D
Brake Booster Temperature Sensor Circuit B Intermittent/Erratic
Intermittent signal from brake booster temp sensor B. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number5 / 7D
Possible causes
- Connector loose high
- Connector with intermittent contact under vibration low
- Harness routed against vibrating component low
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 80–800 €
- Estimated time: 0.5–3 h
- Component: brake booster temp sensor b
- MIL / check engine light
- drive cycle required
Sources
References
sae:J2012