AutoCodes – Pontiac – C0204 Pontiac

C0204 Pontiac Code - Master Cylinder Pressure Sensor

Quick Answer

The Electronic Brake Control Module (EBCM) uses the input from the master cylinder pressure sensor for more accurate braking control during a vehicle stability enhancement system (VSES) event. Common causes include Faulty Master Cylinder Pressure Sensor, Master Cylinder Pressure Sensor harness is open or shorted, 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: C0204 Pontiac indicates Master Cylinder Pressure Sensor.
Common causes: Common causes include Faulty Master Cylinder Pressure Sensor, Master Cylinder Pressure Sensor harness is open or shorted, 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.

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Code Popularity 938

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0204 Pontiac Description

OBDII Code C0204 Pontiac - Master Cylinder Pressure Sensor - AutoCodes.com — C0204 Pontiac Code - Master Cylinder Pressure Sensor

What does this mean?

What are the Possible Causes of the DTC C0204 Pontiac?

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

How to Fix the DTC C0204 Pontiac?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0204 Pontiac 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 C0204 Pontiac code?

Need more information on how to fix the C0204 Pontiac code? Get Access to Factory Service Manuals

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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 C0204 Pontiac Code

1. What does OBDII code C0204 Pontiac for the Master Cylinder Pressure Sensor indicate?

The code C0204 Pontiac indicates a problem with the master cylinder pressure sensor in the vehicle's braking system.

2. What are common symptoms of a malfunctioning Master Cylinder Pressure Sensor?

Common symptoms include the illumination of the ABS warning light on the dashboard, loss of brake assist, and potentially a decrease in braking performance.

3. What are possible causes of the C0204 Pontiac code?

Possible causes include a faulty master cylinder pressure sensor, wiring issues, low brake fluid level, or a problem with the brake system hydraulic unit.

4. How can I diagnose the issue related to the Master Cylinder Pressure Sensor?

Diagnosing the issue may involve using a diagnostic scanner to retrieve the specific trouble code, checking the wiring and connections to the sensor, and testing the sensor itself for proper functionality.

5. Can I continue driving with the C0204 Pontiac code present?

It is not recommended to continue driving with the C0204 code present, as it indicates a potential issue with the braking system that could compromise safety.

6. How can I repair the Master Cylinder Pressure Sensor issue?

Repair options may include replacing the master cylinder pressure sensor, repairing any wiring issues, ensuring the brake fluid level is sufficient, and addressing any other related brake system problems.

7. Is it possible to reset the C0204 Pontiac code without fixing the underlying issue?

While clearing the code may temporarily turn off the warning light, it is crucial to address the root cause of the problem to ensure the safety and proper functioning of the braking system.

8. Can a DIY enthusiast replace the Master Cylinder Pressure Sensor?

Replacing the master cylinder pressure sensor may require some technical knowledge and tools, so it is recommended to consult a professional mechanic for proper installation and calibration.

9. How much does it typically cost to repair the Master Cylinder Pressure Sensor issue?

The cost of repairing the master cylinder pressure sensor can vary depending on the extent of the problem, the vehicle model, and labor costs, but it may range from $200 to $500 or more.

10. How often should the Master Cylinder Pressure Sensor be inspected for potential issues?

Regular brake system inspections, including checking the master cylinder pressure sensor, are recommended as part of routine vehicle maintenance to ensure optimal performance and safety on the road.