AutoCodes – Generic – C2803

C2803 Code - Brake Pressure Transducer Sense Circuit Failure

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
C2803 indicates Brake Pressure Transducer Sense Circuit Failure.
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.
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Code Popularity 2,958
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 C2803 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 C2803 - Brake Pressure Transducer Sense Circuit Failure - AutoCodes.com
C2803 Code - Brake Pressure Transducer Sense Circuit Failure

What are the Possible Causes of the DTC C2803?

  • 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 C2803?

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 C2803 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 C2803 code?

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Need Help with the Code?

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Information for Specific Makes

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 C2803 Code

1. What are the common symptoms of OBDII code C2803, Brake Pressure Transducer Sense Circuit Failure?

- Common symptoms include an illuminated brake warning light on the dashboard, loss of brake performance, and potential ABS system malfunction.

2. What are the possible causes of OBDII code C2803, Brake Pressure Transducer Sense Circuit Failure?

- The code may be triggered by a faulty brake pressure transducer, damaged wiring or connectors in the sense circuit, low brake fluid level, or issues with the ABS module.

3. How can I diagnose OBDII code C2803 related to Brake Pressure Transducer Sense Circuit Failure?

- Diagnosis typically involves using a diagnostic scanner to retrieve the fault codes, performing a visual inspection of the brake system components, and testing the brake pressure transducer and its circuit for proper operation.

4. What are the repair options for OBDII code C2803, Brake Pressure Transducer Sense Circuit Failure?

- Repair options may include replacing the faulty brake pressure transducer, repairing or replacing damaged wiring or connectors, checking and topping up brake fluid level, and addressing any issues with the ABS module.

5. Can driving with OBDII code C2803, Brake Pressure Transducer Sense Circuit Failure be dangerous?

- Driving with this code may compromise the proper functioning of the brake system, leading to reduced braking performance and potential safety hazards. It is recommended to address the issue promptly.

6. How much does it typically cost to repair OBDII code C2803, Brake Pressure Transducer Sense Circuit Failure?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve parts and labor expenses ranging from $200 to $500 or more, depending on the extent of the repairs needed.

7. Is it possible to reset OBDII code C2803, Brake Pressure Transducer Sense Circuit Failure without fixing the underlying issue?

- While clearing the fault code temporarily may turn off the warning light, the issue causing the fault code will persist, potentially leading to further problems with the brake system. It's recommended to address the root cause of the code.

8. Can a DIY enthusiast fix OBDII code C2803, Brake Pressure Transducer Sense Circuit Failure at home?

- Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and address simpler causes of the code, such as checking wiring connections or topping up brake fluid. However, more complex issues may require professional assistance.

9. How quickly should I address OBDII code C2803, Brake Pressure Transducer Sense Circuit Failure?

- It is advisable to address the code as soon as possible to ensure the proper functioning of the brake system and maintain safe driving conditions. Ignoring the issue can lead to further damage and safety risks.

10. Will OBDII code C2803, Brake Pressure Transducer Sense Circuit Failure cause my vehicle to fail an emissions test?

- While this code is related to the brake system and not directly emissions-related, it may still cause your vehicle to fail an emissions test if not addressed promptly, as it indicates a malfunction that can affect overall vehicle performance.

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