AutoCodes – Toyota – C14A5 Toyota

C14A5 Toyota Code - Output Circuit Unintended Current

Quick Answer

The Trailer Brake Control ECU monitors itself. Common causes include Faulty Trailer Brake Control ECU, Trailer Brake Control ECU harness is open or shorted, Trailer Brake Control ECU 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: C14A5 Toyota indicates Output Circuit Unintended Current.
Common causes: Common causes include Faulty Trailer Brake Control ECU, Trailer Brake Control ECU harness is open or shorted, Trailer Brake Control ECU 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 851

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C14A5 Toyota Description

The Trailer Brake Control ECU monitors itself. The Trailer Brake Control ECU sets the OBDII code when it detects an internal malfunction.

OBDII Code C14A5 Toyota - Output Circuit Unintended Current - AutoCodes.com — C14A5 Toyota Code - Output Circuit Unintended Current

What does this mean?

What are the Possible Causes of the DTC C14A5 Toyota?

Faulty Trailer Brake Control ECU
Trailer Brake Control ECU harness is open or shorted
Trailer Brake Control ECU circuit poor electrical connection

How to Fix the DTC C14A5 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 C14A5 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.

Need more information about the C14A5 Toyota code?

Need more information on how to fix the C14A5 Toyota code? Get Access to Factory Service Manuals

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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 C14A5 Toyota Code

1. What are the common symptoms of OBDII code C14A5 in a Toyota related to the Output Circuit Unintended Current?

The common symptoms include illumination of the Check Engine Light, poor engine performance, and potential issues with the vehicle's transmission.

2. What are some possible causes of OBDII code C14A5 in a Toyota?

Potential causes of this code include damaged wiring in the output circuit, a faulty transmission control module (TCM), or a malfunctioning shift solenoid.

3. How can I diagnose the OBDII code C14A5 related to Output Circuit Unintended Current in my Toyota?

Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, conducting a visual inspection of the wiring harness, and testing the components in the output circuit for proper functionality.

4. Can I continue driving my Toyota with the OBDII code C14A5 present?

It is not recommended to continue driving your vehicle with this code present, as it can lead to further damage to the transmission system and potentially cause safety issues on the road.

5. How can I repair OBDII code C14A5 in my Toyota?

Repairing this code may involve repairing or replacing damaged wiring in the output circuit, replacing the transmission control module (TCM), or addressing any issues with the shift solenoid.

6. Is it possible to reset the OBDII code C14A5 in my Toyota without fixing the underlying issue?

While you can clear the trouble codes using a diagnostic scanner, the Check Engine Light is likely to re-illuminate until the root cause of the problem is addressed.

7. Can a DIY enthusiast fix the OBDII code C14A5 issue in a Toyota?

Depending on your experience and skill level, you may be able to address this issue yourself by following repair guides and using the necessary tools. However, complex transmission-related repairs may require professional assistance.

8. How much does it typically cost to repair OBDII code C14A5 in a Toyota at a mechanic or dealership?

Repair costs can vary depending on the exact cause of the issue, but expect to pay for diagnostic time, parts, and labor. It is advisable to obtain multiple quotes from different service providers.

9. Are there any preventive maintenance measures to avoid OBDII code C14A5 in a Toyota?

Regularly inspecting and maintaining the vehicle's wiring harness, transmission components, and TCM can help prevent issues that may trigger this code.

10. Will fixing the OBDII code C14A5 improve the overall performance and fuel efficiency of my Toyota?

Addressing this code promptly can help restore the vehicle's performance and fuel efficiency by ensuring that the transmission system operates optimally without any unintended current issues.