AutoCodes – Generic – C2797

C2797 Code - Brake Pressure Transducer Supply Short To Battery

Quick Answer

The Brake Pressure Transducer is attached to the brake master cylinder and is hardwired to the Trailer Brake Control (TBC) Module. Common causes include Faulty Brake Pressure Transducer, Brake Pressure Transducer harness is open or shorted, Brake Pressure Transducer 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
C2797 indicates Brake Pressure Transducer Supply Short To Battery.
Common causes
Common causes include Faulty Brake Pressure Transducer, Brake Pressure Transducer harness is open or shorted, Brake Pressure Transducer 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 900
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code C2797 Description

The Brake Pressure Transducer is attached to the brake master cylinder and is hardwired to the Trailer Brake Control (TBC) Module. The transducer and the master cylinder are installed new as an assembly. The TBC module supplies voltage to the transducer and ground along circuits. The voltage returned from the transducer and is used by the TBC module to determine current brake pressure. Trailer Brake Control (TBC) Module sets the OBDII code when the Brake Pressure Transducer is not to factory specifications.
OBDII Code C2797 - Brake Pressure Transducer Supply Short To Battery - AutoCodes.com
C2797 Code - Brake Pressure Transducer Supply Short To Battery

What are the Possible Causes of the DTC C2797?

  • Faulty Brake Pressure Transducer
  • Brake Pressure Transducer harness is open or shorted
  • Brake Pressure Transducer circuit poor electrical connection
  • Faulty Trailer Brake Control (TBC) Module

How to Fix the DTC C2797?

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 C2797 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 C2797 code?

Need more information on how to fix the C2797 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C2797 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • C2797 Ford β€” Brake Pressure Transducer Supply Short To Battery
  • C2797 Lincoln β€” Brake Pressure Transducer Supply Short To Battery
  • C2797 Mercury β€” Brake Pressure Transducer Supply Short To Battery
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 C2797 Code

1. What are the common symptoms of OBDII code C2797 (Brake Pressure Transducer Supply Short To Battery)?

The common symptoms of this code may include the illumination of the ABS warning light on the dashboard, loss of ABS functionality, and potential issues with the brake system's performance.

2. What could cause the OBDII code C2797 to appear?

The code C2797 typically appears due to a short circuit between the brake pressure transducer supply and the battery. This can be caused by damaged wiring, faulty connectors, or a malfunctioning brake pressure transducer.

3. How can I diagnose the cause of OBDII code C2797?

To diagnose the cause of code C2797, it's recommended to perform a thorough inspection of the wiring harness, connectors, and brake pressure transducer. Using a multimeter to check for continuity and shorts can help pinpoint the issue.

4. Can I continue to drive my vehicle with OBDII code C2797 present?

It is not recommended to drive your vehicle with OBDII code C2797 active, as it indicates a potential issue with the brake system that could compromise safety. It's best to address the problem promptly.

5. What are the repair options for OBDII code C2797?

Repair options for code C2797 may include repairing or replacing damaged wiring, fixing faulty connectors, or replacing the brake pressure transducer if necessary. It's important to follow manufacturer guidelines for proper repair procedures.

6. How serious is OBDII code C2797?

OBDII code C2797 is considered a serious issue as it relates to the brake system's functionality. Ignoring this code could lead to compromised braking performance and safety hazards. It should be addressed promptly.

7. Can a DIY enthusiast fix OBDII code C2797?

DIY enthusiasts with automotive repair experience may be able to fix OBDII code C2797, especially if they have the necessary tools and knowledge to diagnose and repair electrical issues. However, if unsure, it's best to consult a professional mechanic.

8. How long does it typically take to repair OBDII code C2797?

The repair time for OBDII code C2797 can vary depending on the exact cause of the issue and the extent of repairs needed. It could take anywhere from a few hours to a full day, depending on the complexity of the repair.

9. Will resetting the OBDII code C2797 make it go away permanently?

Simply resetting the code without addressing the underlying issue will not make it go away permanently. The root cause of the problem must be diagnosed and repaired to prevent the code from reappearing.

10. Is it necessary to have the OBDII code C2797 cleared after repairs are completed?

Once the repairs for OBDII code C2797 are completed, it's important to clear the code using an OBDII scanner. This ensures that the system recognizes the issue has been resolved and helps monitor for any future problems.

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