AutoCodes – Cadillac – C12B3 Cadillac

C12B3 Cadillac Code - ABS Master Cylinder Pressure Sensor Circuit Short To Battery

Quick Answer

The Electronic Brake Control Module (EBCM) uses input from the master cylinder pressure sensor for more accurate control during a vehicle stability enhancement system event. Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator 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
C12B3 Cadillac indicates ABS Master Cylinder Pressure Sensor Circuit Short To Battery.
Common causes
Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator 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 840
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 04, 2020
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Code C12B3 Cadillac Description

The Electronic Brake Control Module (EBCM) uses input from the master cylinder pressure sensor for more accurate control during a vehicle stability enhancement system event. The master cylinder pressure sensor is internal to the brake pressure modulator.
OBDII Code C12B3 Cadillac - ABS Master Cylinder Pressure Sensor Circuit Short To Battery - AutoCodes.com
C12B3 Cadillac Code - ABS Master Cylinder Pressure Sensor Circuit Short To Battery

What are the Possible Causes of the DTC C12B3 Cadillac?

  • Faulty Brake Pressure Modulator
  • Brake Pressure Modulator harness is open or shorted
  • Brake Pressure Modulator circuit poor electrical connection

How to Fix the DTC C12B3 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 C12B3 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 C12B3 Cadillac code?

Need more information on how to fix the C12B3 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C12B3 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 C12B3 Cadillac Code

1. What are the common symptoms of OBDII code C12B3 in a Cadillac related to the ABS Master Cylinder Pressure Sensor Circuit Short To Battery?

The common symptoms include the ABS warning light illuminating on the dashboard, loss of ABS functionality, and potential issues with the brake system.

2. What are the possible causes of the ABS Master Cylinder Pressure Sensor Circuit Short To Battery code in a Cadillac?

Possible causes include damaged wiring or connectors in the ABS system, a faulty ABS master cylinder pressure sensor, or a short circuit in the circuit related to the sensor.

3. How can I diagnose the ABS Master Cylinder Pressure Sensor Circuit Short To Battery issue in my Cadillac?

Diagnosis involves using a diagnostic scanner to retrieve the OBDII code C12B3, checking the wiring and connectors for damage, and testing the ABS master cylinder pressure sensor for proper functionality.

4. Can I continue driving my Cadillac with the ABS Master Cylinder Pressure Sensor Circuit Short To Battery code present?

It is not recommended to continue driving the vehicle with this issue unresolved as it can affect the proper functioning of the ABS system, potentially compromising safety.

5. How can I repair the ABS Master Cylinder Pressure Sensor Circuit Short To Battery problem in my Cadillac?

Repair options include repairing or replacing damaged wiring and connectors, replacing the faulty ABS master cylinder pressure sensor, and addressing any short circuits in the circuit.

6. Is it possible to reset the OBDII code C12B3 related to the ABS Master Cylinder Pressure Sensor Circuit Short To Battery in a Cadillac?

Resetting the code can be done using a diagnostic scanner after the underlying issue has been diagnosed and resolved. However, it is important to address the root cause of the problem to prevent the code from reoccurring.

7. Will the ABS Master Cylinder Pressure Sensor Circuit Short To Battery code cause my Cadillac to fail a vehicle inspection?

Depending on the regulations in your area, the presence of this code may cause your Cadillac to fail a vehicle inspection due to safety concerns related to the ABS system.

8. How much does it typically cost to repair the ABS Master Cylinder Pressure Sensor Circuit Short To Battery issue in a Cadillac?

The cost of repair can vary depending on the extent of the damage, the parts needed for replacement, and labor costs. It is recommended to consult with a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast with automotive experience fix the ABS Master Cylinder Pressure Sensor Circuit Short To Battery problem in a Cadillac?

While some DIY enthusiasts may have the skills to diagnose and repair this issue, it is recommended to seek professional help due to the complexity of the ABS system and the importance of ensuring proper functionality.

10. How long does it usually take to repair the ABS Master Cylinder Pressure Sensor Circuit Short To Battery code in a Cadillac?

The repair time can vary depending on the extent of the damage and the availability of parts. It is advisable to consult with a mechanic to get an estimate of the repair timeline.

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