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Engine-Codes – Generic – C1186

C1186 Code - ABS Power Relay Output Open Circuit

Quick Answer

The C1186 diagnostic code indicates an ABS (anti-lock braking system) power relay output open circuit. Common causes include Faulty ABS power relay, Damaged wiring or connectors in the ABS circuit, Corrosion or poor connections in 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
C1186 indicates ABS Power Relay Output Open Circuit.
Common causes
Common causes include Faulty ABS power relay, Damaged wiring or connectors in the ABS circuit, Corrosion or poor connections in 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 09, 2024
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Code C1186 Description

The C1186 diagnostic code indicates an ABS (anti-lock braking system) power relay output open circuit. This means that there is an issue with the power relay that controls the ABS system, resulting in an open circuit that prevents the proper functioning of the ABS system. The ABS system is crucial for maintaining control and stability during braking, especially in emergency situations or slippery road conditions. When this code is triggered, it can lead to compromised braking performance, potentially putting the driver and passengers at risk.

OBDII Code C1186 - ABS Power Relay Output Open Circuit
C1186 Code - ABS Power Relay Output Open Circuit

Common Causes of C1186

  1. Faulty ABS power relay.
  2. Damaged wiring or connectors in the ABS circuit.
  3. Corrosion or poor connections in the ABS system.
  4. Electrical issues in the vehicle's power supply.
  5. Defective ABS control module.

Symptoms of C1186

  1. ABS warning light illuminated on the dashboard.
  2. Decreased braking performance.
  3. Unusual noises or vibrations during braking.
  4. ABS system becomes inoperative.

How to Fix C1186

  1. Diagnose the issue by using a diagnostic scanner to retrieve the specific fault codes, including C1186.
  2. Inspect the ABS power relay, wiring, and connectors for any signs of damage or corrosion.
  3. Test the ABS power relay for proper functionality using a multimeter.
  4. Replace the faulty ABS power relay if necessary.
  5. Clear the fault codes and test the ABS system to ensure proper operation.

Cost to Fix C1186

The typical repair costs for addressing a C1186 code can vary depending on the specific cause of the issue and the parts and labor involved. In general, replacing an ABS power relay can cost between $100 and $300, including parts and labor. However, the overall cost may increase if additional components need to be replaced or if there are underlying electrical issues that require further diagnosis and repairs. It is advisable to consult with a professional mechanic or auto repair shop to get a more accurate estimate based on the specific circumstances of the vehicle.

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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 C1186 Code

1. What are common symptoms of OBDII code C1186 ABS Power Relay Output Open Circuit?

A: Common symptoms include the ABS warning light being illuminated on the dashboard, loss of ABS functionality, and potential issues with the braking system.

2. What can cause the OBDII code C1186 ABS Power Relay Output Open Circuit?

A: The code C1186 can be caused by a malfunctioning ABS power relay, damaged wiring or connectors related to the ABS system, or a faulty ABS control module.

3. How can I diagnose the OBDII code C1186 ABS Power Relay Output Open Circuit?

A: Diagnosing the code typically involves using a diagnostic scanner to retrieve the code, inspecting the ABS system components for visible damage, and performing electrical tests on the ABS power relay and associated wiring.

4. Can I continue driving with the OBDII code C1186 ABS Power Relay Output Open Circuit?

A: It is not recommended to drive with the ABS warning light on, as it indicates a potential issue with the anti-lock braking system that may compromise safety. It is advised to address the issue promptly.

5. How can I repair the OBDII code C1186 ABS Power Relay Output Open Circuit?

A: Repairing the code may involve replacing the faulty ABS power relay, repairing damaged wiring or connectors, or addressing any issues with the ABS control module. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

6. Are there any DIY tips for fixing the OBDII code C1186 ABS Power Relay Output Open Circuit?

A: DIY tips may include checking and securing ABS system connections, inspecting for visible damage, and testing the ABS power relay using a multimeter. However, complex repairs may require professional assistance.

7. Can a low battery voltage cause the OBDII code C1186 ABS Power Relay Output Open Circuit?

A: Yes, low battery voltage or a weak electrical system can potentially trigger the code C1186 due to insufficient power supply to the ABS components. Ensuring a healthy battery and electrical system is important for proper ABS operation.

8. How much does it typically cost to repair the OBDII code C1186 ABS Power Relay Output Open Circuit?

A: Repair costs can vary depending on the specific cause of the code and the labor rates in your area. Replacing an ABS power relay or repairing wiring may cost a few hundred dollars, while addressing issues with the ABS control module can be more expensive.

9. Can extreme weather conditions contribute to the OBDII code C1186 ABS Power Relay Output Open Circuit?

A: Extreme weather conditions, such as excessive heat or moisture, can potentially contribute to electrical issues in the ABS system, leading to the code C1186. It is important to keep the ABS components well-protected and maintained in all conditions.

10. Is it necessary to reset the OBDII code C1186 ABS Power Relay Output Open Circuit after repairs?

A: Yes, it is recommended to clear the code after addressing the underlying issue to reset the ABS system and ensure proper functionality. This can be done using a diagnostic scanner or by disconnecting the vehicle's battery for a few minutes.

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