C0086
Master Cylinder Pressure Sensor Circuit Low
1992-1996 BMW 318is E36 1.8L I4 🇩🇪
Moderate SeverityChassis
Description
Low voltage from the master cylinder brake pressure sensor, indicating a circuit fault.
Symptoms
- ABS light on
- Stability control disabled
- Brake assist may not function
- Regenerative braking malfunction on hybrids
Common Causes
- Sensor short to ground
- Faulty pressure sensor
- Connector pin damage
- Low battery voltage to sensor
Diagnostic Steps
- Test sensor supply voltage
- Check signal wire for shorts to ground
- Inspect sensor connector
- Test sensor output while pressing brake pedal
- Check for related ABS module codes
Repair Notes
Replace master cylinder pressure sensor. Verify supply voltage.
Related Codes
Other Chassis Codes
- C0021LF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0026RF Wheel Speed Sensor Circuit Intermittent
- C0027LR Wheel Speed Sensor Circuit Intermittent
- C0028RR Wheel Speed Sensor Circuit Intermittent
- C0035Left Front Wheel Speed Sensor Circuit
- C0036Left Front Wheel Speed Signal Erratic
C0086 on Other Vehicles
Common Questions
What does code C0086 mean on a 1992-1996 BMW 318is E36?
C0086 stands for "Master Cylinder Pressure Sensor Circuit Low". Low voltage from the master cylinder brake pressure sensor, indicating a circuit fault.
What are the symptoms of C0086 on a BMW 318is E36?
Common symptoms of C0086 include: ABS light on, Stability control disabled, Brake assist may not function, Regenerative braking malfunction on hybrids.
What causes C0086 on a 1992-1996 BMW 318is E36?
Common causes of C0086 include: Sensor short to ground, Faulty pressure sensor, Connector pin damage, Low battery voltage to sensor.