Chassis
generic / SAE
C057E
Brake Booster Temperature Sensor A/B Correlation
Brake booster temperature sensors A and B disagree beyond plausible deviation. 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 / 7E
Possible causes
- One sensor drifted high
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 sensors
- MIL / check engine light
- drive cycle required
Sources
References
sae:J2012