AutoCodes – Generic – C2805

C2805 Code - Brake Pressure Transducer Ground Circuit 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
C2805 indicates Brake Pressure Transducer Ground Circuit 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.
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Code Popularity 1,249
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 C2805 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 C2805 - Brake Pressure Transducer Ground Circuit Short To Battery - AutoCodes.com
C2805 Code - Brake Pressure Transducer Ground Circuit Short To Battery

What are the Possible Causes of the DTC C2805?

  • 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 C2805?

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 C2805 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 C2805 code?

Need more information on how to fix the C2805 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C2805 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • C2805 Ford β€” Brake Pressure Transducer Ground Circuit Short To Battery
  • C2805 Lincoln β€” Brake Pressure Transducer Ground Circuit Short To Battery
  • C2805 Mercury β€” Brake Pressure Transducer Ground Circuit 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 C2805 Code

1. What are the common symptoms of OBDII code C2805 (Brake Pressure Transducer Ground Circuit Short To Battery)?

- Common symptoms include the ABS warning light illuminated on the dashboard, potential loss of anti-lock braking system functionality, and possible issues with brake performance.

2. What usually causes the OBDII code C2805 (Brake Pressure Transducer Ground Circuit Short To Battery)?

- This code is typically triggered by a short circuit between the brake pressure transducer ground circuit and the battery, often caused by damaged wiring or faulty components.

3. How can I diagnose the Brake Pressure Transducer Ground Circuit Short To Battery issue associated with code C2805?

- Diagnosis often involves inspecting the wiring harness for any visible damage, testing the brake pressure transducer and related components for proper operation, and using a diagnostic scan tool to pinpoint the exact source of the short circuit.

4. Is it safe to drive my vehicle with OBDII code C2805 active?

- It is not recommended to drive the vehicle with this code active, as it can affect the proper functioning of the anti-lock braking system and compromise brake performance, potentially leading to unsafe driving conditions.

5. Can I fix the Brake Pressure Transducer Ground Circuit Short To Battery issue myself?

- Depending on your level of automotive repair experience, you may be able to address this issue yourself by inspecting the wiring, replacing damaged components, and clearing the code with a diagnostic scan tool. However, professional help is often recommended for proper diagnosis and repair.

6. Are there any specific repair tips for resolving OBDII code C2805?

- When repairing this issue, make sure to carefully inspect all wiring connections, replace any damaged wires or connectors, and test the brake pressure transducer and related components for proper functionality before clearing the code.

7. How much does it typically cost to repair OBDII code C2805 (Brake Pressure Transducer Ground Circuit Short To Battery)?

- The cost of repairing this issue can vary depending on the extent of the damage and whether you choose to do the repair yourself or seek professional help. Costs may include parts, labor, and diagnostic fees.

8. Can a faulty brake pressure transducer cause other issues in addition to triggering code C2805?

- Yes, a faulty brake pressure transducer can lead to various braking-related problems, such as inconsistent brake performance, ABS malfunctions, and potential safety concerns while driving.

9. Will the OBDII code C2805 (Brake Pressure Transducer Ground Circuit Short To Battery) reset on its own after repairs are made?

- After repairing the underlying issue causing the code, you may need to use a diagnostic scan tool to clear the code from the vehicle's computer system and reset the ABS warning light on the dashboard.

10. How urgent is it to address OBDII code C2805 (Brake Pressure Transducer Ground Circuit Short To Battery)?

- It is important to address this code promptly to ensure the proper functioning of the anti-lock braking system and maintain safe driving conditions. Ignoring this code can lead to brake-related issues and potentially compromise vehicle safety.

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