AutoCodes – Cadillac – C0204 Cadillac

C0204 Cadillac 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 Cadillac 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 893

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 Cadillac Description

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

What does this mean?

What are the Possible Causes of the DTC C0204 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac code?

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

Need Help with the Code?

Get the C0204 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 Cadillac Code

1. What are common symptoms of a C0204 Cadillac OBDII code related to the Master Cylinder Pressure Sensor?

Common symptoms include the ABS warning light illuminating on the dashboard, loss of traction control, and potential issues with the vehicle's stability control system.

2. What could be causing the C0204 OBDII code to appear on a Cadillac?

The code C0204 typically indicates a fault with the Master Cylinder Pressure Sensor, which may be caused by sensor wiring issues, sensor malfunctions, or problems with the brake system.

3. How can I diagnose the root cause of a C0204 Cadillac OBDII code?

To diagnose the issue, it is recommended to perform a visual inspection of the sensor wiring, check the sensor for proper operation, and test the brake system to ensure functionality.

4. What are some repair tips for addressing a C0204 code related to the Master Cylinder Pressure Sensor?

Repair tips may include repairing or replacing damaged sensor wiring, checking and calibrating the pressure sensor, and ensuring the brake system is in proper working condition.

5. Can I drive my Cadillac with a C0204 OBDII code present?

It is not recommended to drive the vehicle with the C0204 code present, as it may affect the vehicle's braking system and overall safety.

6. How important is it to address a C0204 OBDII code promptly?

Addressing the C0204 code promptly is crucial to ensure the proper functioning of the vehicle's brake and stability control systems, as well as maintaining overall safety while driving.

7. Is it possible to reset the C0204 OBDII code on a Cadillac without addressing the underlying issue?

Resetting the code without addressing the root cause is not recommended, as the issue will likely persist and could lead to further problems with the vehicle's braking system.

8. Can a DIY enthusiast repair a C0204 Cadillac OBDII code related to the Master Cylinder Pressure Sensor?

While some basic troubleshooting and repairs may be possible for DIY enthusiasts, it is recommended to consult a professional mechanic for accurate diagnosis and repair of the issue.

9. How much can I expect to pay for repairing a C0204 OBDII code on a Cadillac?

The cost of repairing a C0204 code can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is advisable to obtain quotes from multiple mechanics for an accurate estimate.

10. Are there any recalls or service bulletins related to the C0204 OBDII code in Cadillac vehicles?

It is advisable to check with the manufacturer or authorized dealerships for any recalls or service bulletins related to the C0204 code in Cadillac vehicles, as there may be relevant information or solutions provided by the manufacturer.