Chassis
generic / SAE
C0587
Brake Booster Motor A Position Sensor Circuit/Open
Open circuit on brake booster motor A position sensor (resolver/encoder feedback for closed-loop motor control).
SystemChassis
Typegeneric / SAE
GroupC0
Range / number5 / 87
Possible causes
- Signal wire open high
- Pin pushed back out of connector body low
- Cracked solder joint inside the module or sensor low
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–5 h
- Component: booster motor a pos sensor
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012