Brake Master Cylinder Piston Position Sensor A Circuit Voltage Low
Master cylinder piston position sensor A signal voltage below expected range.
Affected components
- Master cylinder pos sensor a
Common causes
- High likelihood: Signal wire shorted to ground
Possible symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.