AutoCodes – Generic – C1954

C1954 Code - Brake Master Cylinder Pressure Sensor Circuit Failure

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Brake Master Cylinder Pressure Sensor. Common causes include Faulty Brake Master Cylinder Pressure Sensor, Brake Master Cylinder Pressure Sensor harness is open or shorted, Brake Master Cylinder Pressure Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
C1954 indicates Brake Master Cylinder Pressure Sensor Circuit Failure.
Common causes
Common causes include Faulty Brake Master Cylinder Pressure Sensor, Brake Master Cylinder Pressure Sensor harness is open or shorted, Brake Master Cylinder Pressure Sensor circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 20,540
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 07, 2023
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Code C1954 Description

The Anti-Lock Brake System (ABS) Module monitors the Brake Master Cylinder Pressure Sensor. The ABS Module sets the OBDII code when the Brake Master Cylinder Pressure Sensor is not to factory specifications.
OBDII Code C1954 - Brake Master Cylinder Pressure Sensor Circuit Failure - AutoCodes.com
C1954 Code - Brake Master Cylinder Pressure Sensor Circuit Failure

What are the Possible Causes of the DTC C1954?

  • Faulty Brake Master Cylinder Pressure Sensor
  • Brake Master Cylinder Pressure Sensor harness is open or shorted
  • Brake Master Cylinder Pressure Sensor circuit poor electrical connection

How to Fix the DTC C1954?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1954 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C1954 code?

Need more information on how to fix the C1954 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1954 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • C1954 Ford β€” Brake Master Cylinder Pressure Sensor Circuit Failure
  • C1954 Lincoln β€” Brake Master Cylinder Pressure Sensor Circuit Failure
  • C1954 Mazda β€” Brake Master Cylinder Pressure Sensor Circuit Failure
  • C1954 Mercury β€” Brake Master Cylinder Pressure Sensor Circuit Failure
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1954 Code

1. What are the common symptoms of OBDII code C1954 (Brake Master Cylinder Pressure Sensor Circuit Failure)?

Common symptoms include the illumination of the ABS warning light on the dashboard, loss of ABS functionality, and potential issues with the vehicle's braking system.

2. What are the possible causes of OBDII code C1954?

The code C1954 can be triggered by a faulty brake master cylinder pressure sensor, damaged wiring or connectors in the sensor circuit, or issues with the ABS module.

3. How can I diagnose the root cause of OBDII code C1954?

Diagnosing code C1954 typically involves using a professional OBDII scanner to read the fault codes, conducting a visual inspection of the sensor and its circuit, and performing tests on the sensor's voltage and resistance.

4. Can I continue driving my vehicle with OBDII code C1954 present?

It is not recommended to drive the vehicle with code C1954 active, as it may affect the proper functioning of the ABS system. It is advisable to address the issue promptly to ensure safety and prevent further damage.

5. How can I repair OBDII code C1954 (Brake Master Cylinder Pressure Sensor Circuit Failure)?

Repairing code C1954 may involve replacing the brake master cylinder pressure sensor, repairing or replacing damaged wiring or connectors, or reprogramming the ABS module if necessary.

6. Is it possible to reset OBDII code C1954 without fixing the underlying issue?

Resetting the code without addressing the root cause will only temporarily clear the fault code. The issue will persist, and the code is likely to reappear until the underlying problem is resolved.

7. Can a DIY enthusiast fix OBDII code C1954 at home?

While some aspects of diagnosing and repairing code C1954 can be done by experienced DIY enthusiasts, dealing with ABS and brake system components may require specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

8. Are there any preventive measures to avoid OBDII code C1954 in the future?

Regular maintenance of the brake system, including checking brake fluid levels and ensuring proper functioning of ABS components, can help prevent issues that may lead to code C1954.

9. Will fixing OBDII code C1954 improve my vehicle's performance?

Fixing code C1954 will restore the proper functioning of the brake master cylinder pressure sensor and ABS system, ensuring optimal braking performance and safety while driving.

10. How much can I expect to pay for repairing OBDII code C1954?

The cost of repairing code C1954 can vary depending on the specific cause of the issue, the extent of the repair needed, and labor rates. It is advisable to obtain quotes from reputable mechanics or service centers for an accurate estimate.

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