AutoCodesToyota – C14A6 Toyota

C14A6 Toyota Code - Output Circuit Negative Voltage

Quick Answer

The Trailer Brake Control ECU (Brake Control with Bracket Relay) is connected via the trailer socket and direct line. Common causes include Faulty Trailer Brake Control ECU (Brake Control with Bracket Relay), Trailer Brake Control ECU (Brake Control with Bracket Relay) harness is open or shorted, Trailer Brake Control ECU (Brake Control with Bracket Relay) 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
C14A6 Toyota indicates Output Circuit Negative Voltage.
Common causes
Common causes include Faulty Trailer Brake Control ECU (Brake Control with Bracket Relay), Trailer Brake Control ECU (Brake Control with Bracket Relay) harness is open or shorted, Trailer Brake Control ECU (Brake Control with Bracket Relay) 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 3,259
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Oct 25, 2020
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Code C14A6 Toyota Description

The Trailer Brake Control ECU (Brake Control with Bracket Relay) is connected via the trailer socket and direct line. The Trailer Brake Control ECU (Brake Control with Bracket Relay) outputs a signal to the trailer socket. Trailer Brake Control ECU (Brake Control with Bracket Relay) sets the OBDII code when the voltage is continuously inputted to trailer brake control ECU (brake control with bracket relay) output circuit for 2 seconds or more.
OBDII Code C14A6 Toyota - Output Circuit Negative Voltage - AutoCodes.com
C14A6 Toyota Code - Output Circuit Negative Voltage

What are the Possible Causes of the DTC C14A6 Toyota?

  • Faulty Trailer Brake Control ECU (Brake Control with Bracket Relay)
  • Trailer Brake Control ECU (Brake Control with Bracket Relay) harness is open or shorted
  • Trailer Brake Control ECU (Brake Control with Bracket Relay) circuit poor electrical connection

How to Fix the DTC C14A6 Toyota?

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 C14A6 Toyota 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.

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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 C14A6 Toyota Code

1. What does OBDII code C14A6 mean on a Toyota?

C14A6 indicates an issue with the output circuit negative voltage, typically related to the vehicle's stability control or ABS system.

2. What are common symptoms of the C14A6 code?

Symptoms may include the ABS or traction control warning light illuminating, reduced braking performance, or loss of stability control functionality.

3. What causes the C14A6 code to appear?

Common causes include a faulty ABS actuator, damaged wiring or connectors in the circuit, or a malfunctioning electronic control module (ECM).

4. Can I drive my Toyota with a C14A6 code?

While the car may still be drivable, safety features like ABS or traction control might not function properly, so it’s best to address the issue promptly.

5. How do I diagnose the C14A6 code?

Start by checking the wiring and connectors in the ABS system for damage or corrosion. Next, use a scan tool to test the ABS actuator and related components.

6. How can I fix the C14A6 code?

Repairs may involve replacing damaged wiring, repairing connectors, or replacing the ABS actuator if it is determined to be faulty.

7. How much does it cost to fix the C14A6 code?

Repair costs vary depending on the issue. Wiring repairs might cost $50–$200, while replacing the ABS actuator could cost $500–$1,200, including labor.

8. Can a weak battery cause the C14A6 code?

Yes, a weak or failing battery can sometimes cause voltage-related issues in the ABS system, potentially triggering this code.

9. Is it possible to clear the C14A6 code without repairs?

Clearing the code with a scan tool may temporarily remove it, but if the underlying issue isn’t fixed, the code and warning lights will likely return.

10. Should I take my Toyota to a mechanic for the C14A6 code?

If you’re not experienced with diagnosing and repairing ABS systems, it’s recommended to take your vehicle to a qualified mechanic for proper inspection and repair.

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