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Engine-Codes – Generic – C146C

C146C Code - Open In ABS Motor Relay Circuit

Quick Answer

The C146C diagnostic trouble code indicates an open in the ABS motor relay circuit. Common causes include Damaged or corroded wiring in the ABS motor relay circuit, Faulty ABS motor relay, Blown fuse related to the ABS system. 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
C146C indicates Open In ABS Motor Relay Circuit.
Common causes
Common causes include Damaged or corroded wiring in the ABS motor relay circuit, Faulty ABS motor relay, Blown fuse related to the ABS system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code C146C Description

The C146C diagnostic trouble code indicates an open in the ABS motor relay circuit. This means that there is an issue with the circuit that controls the ABS (anti-lock braking system) motor relay. The ABS motor relay is responsible for controlling the ABS system's hydraulic pump, which helps to modulate brake pressure during hard braking or slippery road conditions. When there is an open in this circuit, it can lead to the ABS system not functioning properly, potentially compromising the vehicle's ability to brake effectively and safely.

OBDII Code C146C - Open In ABS Motor Relay Circuit
C146C Code - Open In ABS Motor Relay Circuit

Common Causes of C146C

  1. Damaged or corroded wiring in the ABS motor relay circuit
  2. Faulty ABS motor relay
  3. Blown fuse related to the ABS system
  4. Malfunctioning ABS control module
  5. Issues with the ABS hydraulic pump

Symptoms of C146C

  1. ABS warning light illuminated on the dashboard
  2. Inconsistent or weak braking performance, especially during hard braking or slippery conditions
  3. ABS system not engaging when needed
  4. Unusual noises coming from the ABS system during operation

How to Fix C146C

  1. Begin by conducting a thorough visual inspection of the ABS motor relay circuit, checking for any visible damage or corrosion in the wiring.
  2. Test the ABS motor relay using a multimeter to determine if it is functioning correctly. Replace the relay if necessary.
  3. Check and replace any blown fuses related to the ABS system.
  4. Test the ABS control module to ensure it is sending the proper signals to the ABS motor relay. Replace the control module if needed.
  5. If the issue persists, inspect the ABS hydraulic pump for any malfunctions or damage and replace if necessary.

Cost to Fix C146C

The typical repair costs for resolving an open in the ABS motor relay circuit can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships and lower at independent shops. It's recommended to check with local shops for a more accurate estimate.

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Code C146C 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 C146C Code

1. What are common symptoms of OBDII code C146C (Open In ABS Motor Relay Circuit)?

- Common symptoms include the ABS warning light illuminating on the dashboard, loss of anti-lock braking system functionality, and potential difficulty in braking.

2. What can cause OBDII code C146C to trigger?

- This code is typically triggered by an open circuit in the ABS motor relay circuit, which may be caused by damaged wiring, a faulty relay, or a poor connection.

3. How can I diagnose the issue related to OBDII code C146C?

- To diagnose the issue, you can perform a visual inspection of the wiring and relay involved in the ABS motor circuit, check for loose connections, and use a multimeter to test for continuity.

4. What are the potential repair options for OBDII code C146C?

- Repair options may include repairing or replacing damaged wiring, replacing the faulty ABS motor relay, ensuring proper connections, and clearing the trouble code with a diagnostic scanner.

5. Can I drive my vehicle with OBDII code C146C present?

- It is not recommended to drive your vehicle with this code present, as it may indicate a potential issue with the anti-lock braking system, compromising your safety on the road.

6. How serious is OBDII code C146C (Open In ABS Motor Relay Circuit)?

- This code is considered serious as it affects the functionality of the anti-lock braking system, which is crucial for safe braking performance, especially in emergency situations.

7. How much does it typically cost to repair OBDII code C146C?

- The cost of repair can vary depending on the extent of the issue, but it may range from a simple fix like repairing a wire to a more complex repair involving replacing the ABS motor relay.

8. Can I reset OBDII code C146C without fixing the underlying issue?

- While you can clear the trouble code with a diagnostic scanner, it is important to address the underlying issue causing the code to prevent further safety risks and ensure proper functionality of the ABS.

9. Are there any DIY repair tips for OBDII code C146C?

- DIY repair tips may include checking and securing wiring connections, inspecting the ABS motor relay for damage, and consulting the vehicle's service manual for specific repair instructions.

10. How long does it typically take to repair OBDII code C146C?

- The repair time can vary depending on the exact cause of the code and the complexity of the repair needed, but it may take anywhere from a few minutes for simple fixes to a few hours for more involved repairs.

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