OBD Guide
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C142A

Master Cylinder Pressure Sensor Internal Malfunction

C142A is an OBD-II diagnostic trouble code meaning: Master Cylinder Pressure Sensor Internal Malfunction. Common causes: master cylinder pressure sensor malfunction, wiring harness damage. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • ABS/ESP indicator is on
  • Reduced braking performance
  • Incorrect operation of the stabilization system

Causes

  • Master cylinder pressure sensor malfunction
  • Wiring harness damage
  • Problems with the brake ECU
  • Contact corrosion

How to Fix

  1. Check the master cylinder pressure sensor for damage.
  2. Check the wiring harness and contacts for integrity and corrosion
  3. Replace sensor if necessary
  4. Check and reflash the ECU if necessary

Related codes

C142BC142CC142D

FAQ

What does the C142A code mean?

C142A is an OBD-II diagnostic trouble code that indicates: Master Cylinder Pressure Sensor Internal Malfunction

What causes a C142A error code?

The most common causes of C142A include: Master cylinder pressure sensor malfunction; Wiring harness damage; Problems with the brake ECU; Contact corrosion.

How do I fix a C142A diagnostic trouble code?

To fix C142A: Check the master cylinder pressure sensor for damage.. Check the wiring harness and contacts for integrity and corrosion. Replace sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C142A?

Limited driving only, diagnose soon

How much does it cost to fix C142A?

The estimated repair cost for C142A is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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