C0087moderate severityChassis
Master Cylinder Pressure Sensor Circuit High
on 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD
What this code means
High voltage from the master cylinder brake pressure sensor circuit.
Symptoms
- ABS light on
- Brake system warning
- Stability control fault
- False high-pressure reading
Common causes
- Signal wire open or shorted to voltage
- Faulty pressure sensor
- Connector corrosion
- Reference voltage issue
Diagnostic steps
- Test sensor signal voltage with brake released and applied
- Check for open circuits in signal wire
- Inspect connector for corrosion
- Verify reference voltage at sensor
Repair notes
Repair wiring or replace brake pressure sensor.
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