Chassis
generic / SAE
C057C
Brake Booster Temperature Sensor B Circuit Range/Performance
Brake booster temperature sensor B reading implausible. 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 / 7C
Possible causes
- Sensor reading drifted high
- Sensor element aged beyond calibration window low
- Sensor mounting loose - signal damping 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: 150–1200 €
- Estimated time: 1–4 h
- Component: brake booster temp sensor b
- MIL / check engine light
- drive cycle required
Sources
References
sae:J2012