OBD Guide
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C1954

Master Cylinder Pressure Sensor Circuit Failure

C1954 is an OBD-II diagnostic trouble code meaning: Master Cylinder Pressure Sensor Circuit Failure. Common causes: open or short circuit in wiring harness, master cylinder pressure sensor malfunction. Estimated repair cost: $111–278.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$111–278 (est.)

Symptoms

  • Check Engine Light Is On
  • Deterioration in braking performance
  • Activating the emergency brake system
  • Incorrect operation of ABS or ESP

Causes

  • Open or short circuit in wiring harness
  • Master cylinder pressure sensor malfunction
  • Poor contact in the sensor connector
  • Problems with the electronic control unit (ECU)

How to Fix

  1. Check the wiring harness for breaks or damage
  2. Check the connections and contacts of the sensor
  3. Test the pressure sensor with a multimeter
  4. If necessary, replace the master cylinder pressure sensor
  5. Reset the error using an OBD-II scanner

Related codes

C1952C0400C1210

FAQ

What does the C1954 code mean?

C1954 is an OBD-II diagnostic trouble code that indicates: Master Cylinder Pressure Sensor Circuit Failure

What causes a C1954 error code?

The most common causes of C1954 include: Open or short circuit in wiring harness; Master cylinder pressure sensor malfunction; Poor contact in the sensor connector; Problems with the electronic control unit (ECU).

How do I fix a C1954 diagnostic trouble code?

To fix C1954: Check the wiring harness for breaks or damage. Check the connections and contacts of the sensor. Test the pressure sensor with a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1954?

Limited driving only, diagnose soon

How much does it cost to fix C1954?

The estimated repair cost for C1954 is $111–278. Actual cost depends on your vehicle, location, and labor rates.

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