C128E
ABS Master Cylinder Pressure Sensor Raw Offset Error
C128E is an OBD-II diagnostic trouble code meaning: ABS Master Cylinder Pressure Sensor Raw Offset Error. Common causes: master cylinder pressure sensor malfunction, problems with the wiring harness to the sensor. Estimated repair cost: $56–167.
Symptoms
- The ABS warning light on the dashboard comes on
- Disabling the ABS system
- Incorrect operation of the ESP/TCS system (if installed)
- Unusual behavior of the brake pedal
Causes
- Master cylinder pressure sensor malfunction
- Problems with the wiring harness to the sensor
- Corrosion or poor contact in connectors
- Low brake fluid level
- Air entering the hydraulic system
- ABS module malfunction
How to Fix
- Check the level and condition of the brake fluid
- Visually inspect the pressure sensor and its connection
- Check the integrity and resistance of the wiring harness
- Using a diagnostic scanner, check the actual sensor values
- If necessary, replace the pressure sensor
- Bleed the brake system (if signs of air ingress are detected)
Related codes
FAQ
What does the C128E code mean?
C128E is an OBD-II diagnostic trouble code that indicates: ABS Master Cylinder Pressure Sensor Raw Offset Error
What causes a C128E error code?
The most common causes of C128E include: Master cylinder pressure sensor malfunction; Problems with the wiring harness to the sensor; Corrosion or poor contact in connectors; Low brake fluid level.
How do I fix a C128E diagnostic trouble code?
To fix C128E: Check the level and condition of the brake fluid. Visually inspect the pressure sensor and its connection. Check the integrity and resistance of the wiring harness. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C128E?
Limited driving only, diagnose soon
How much does it cost to fix C128E?
The estimated repair cost for C128E is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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