C0203
Master Cylinder Pressure Sensor
C0203 is an OBD-II diagnostic trouble code meaning: Master Cylinder Pressure Sensor. Common causes: pressure sensor malfunction, open or shorted wiring harness. Estimated repair cost: $56–167.
Symptoms
- ABS/ESP indicator is on
- Reduced braking performance
- Incorrect operation of the stabilization system
Causes
- Pressure sensor malfunction
- Open or shorted wiring harness
- Poor contact in the sensor connector
- Malfunction of the ABS/ESP control unit
How to Fix
- Check the pressure sensor using an OBD-II scanner
- Check the integrity of the wiring harness and contacts
- Replace sensor if necessary
- Check ABS/ESP control unit
Related codes
Error C0203 by Vehicle Brand
FAQ
What does the C0203 code mean?
C0203 is an OBD-II diagnostic trouble code that indicates: Master Cylinder Pressure Sensor
What causes a C0203 error code?
The most common causes of C0203 include: Pressure sensor malfunction; Open or shorted wiring harness; Poor contact in the sensor connector; Malfunction of the ABS/ESP control unit.
How do I fix a C0203 diagnostic trouble code?
To fix C0203: Check the pressure sensor using an OBD-II scanner. Check the integrity of the wiring harness and contacts. Replace sensor if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0203?
Do not drive — repair immediately
How much does it cost to fix C0203?
The estimated repair cost for C0203 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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