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Engine-Codes – Generic – C0273

C0273 Code - Open In ABS Motor Relay Circuit

Quick Answer

The C0273 diagnostic trouble code indicates that there is an open circuit in the ABS motor relay circuit. Common causes include Faulty ABS motor relay, Broken or damaged wiring in the ABS motor relay circuit, Corrosion or poor connections in the ABS motor relay circuit. 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
C0273 indicates Open In ABS Motor Relay Circuit.
Common causes
Common causes include Faulty ABS motor relay, Broken or damaged wiring in the ABS motor relay circuit, Corrosion or poor connections in the ABS motor relay circuit.
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 08, 2024
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Code C0273 Description

The C0273 diagnostic trouble code indicates that there is an open circuit in the ABS motor relay circuit. The ABS (Antilock Brake System) motor relay is responsible for controlling the operation of the ABS system, specifically the ABS motor. When the ABS system detects wheel lockup during braking, it activates the ABS motor to modulate brake pressure and prevent skidding.

OBDII Code C0273 - Open In ABS Motor Relay Circuit
C0273 Code - Open In ABS Motor Relay Circuit

Common Causes of C0273

  1. Faulty ABS motor relay
  2. Broken or damaged wiring in the ABS motor relay circuit
  3. Corrosion or poor connections in the ABS motor relay circuit
  4. Issues with the ABS control module
  5. Electrical problems in the ABS system

Symptoms of C0273

  1. ABS warning light illuminated on the dashboard
  2. ABS system not engaging during hard braking or slippery conditions
  3. Longer stopping distances during braking
  4. Unusual noises coming from the ABS system
  5. Loss of traction control functionality

How to Fix C0273

  1. Diagnose the issue by using a scan tool to retrieve the fault code and inspect the ABS motor relay circuit for any visible damage.
  2. Test the ABS motor relay for proper functionality using a multimeter.
  3. Check for continuity in the wiring of the ABS motor relay circuit and repair or replace any damaged wires.
  4. Inspect the connections in the ABS motor relay circuit for corrosion or loose connections and address as needed.
  5. If the ABS motor relay is faulty, replace it with a new relay following manufacturer guidelines.

Cost to Fix C0273

The cost of repairing an open circuit in the ABS motor relay circuit can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost can be anywhere from $150 to $500. It's important to note that these are rough estimates, and actual costs may differ based on individual circumstances and the extent of the repair needed. It's recommended to consult with a qualified mechanic or repair shop for a more accurate cost estimate.

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Code C0273 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 C0273 Code

1. What are the common symptoms of an OBDII code C0273?

- Common symptoms include the ABS warning light illuminating on the dashboard, loss of ABS functionality, and potential issues with the vehicle's braking system.

2. What are the possible causes of an OBDII code C0273?

- The code C0273 can be triggered by an open circuit in the ABS motor relay circuit, a faulty ABS motor relay, damaged wiring, or a malfunctioning ABS control module.

3. How can I diagnose an open in the ABS motor relay circuit causing code C0273?

- Diagnosing the open circuit involves checking the wiring for continuity, inspecting the ABS motor relay for proper function, and testing the ABS control module for any faults using a diagnostic scan tool.

4. Can a DIY enthusiast repair an open in the ABS motor relay circuit triggering code C0273?

- Repairing an open circuit in the ABS motor relay circuit may require advanced automotive diagnostic skills and tools. It is recommended to seek assistance from a qualified mechanic for proper diagnosis and repair.

5. Is driving the vehicle with an OBDII code C0273 safe?

- Driving with an active C0273 fault code is not recommended, as it can lead to the loss of ABS functionality, compromising the vehicle's braking system and overall safety. Immediate attention and repair are advised.

6. How much does it typically cost to repair an OBDII code C0273 related to an open ABS motor relay circuit?

- The cost of repairing a C0273 code can vary depending on the underlying cause. It may involve replacing the ABS motor relay, repairing wiring issues, or addressing problems with the ABS control module, with costs ranging from a few hundred to over a thousand dollars.

7. Can a faulty wheel speed sensor trigger code C0273?

- A faulty wheel speed sensor is not a direct cause of code C0273 related to an open ABS motor relay circuit. However, it is essential to address any additional ABS-related issues to ensure the overall functionality of the system.

8. How long does it take to repair an open in the ABS motor relay circuit causing code C0273?

- The repair time for resolving an open circuit in the ABS motor relay circuit can vary based on the extent of the issue and the availability of parts. It may take a few hours to a full day for a mechanic to diagnose and repair the problem.

9. Can a low battery voltage trigger code C0273?

- Low battery voltage can potentially cause electrical issues in the vehicle, including triggering code C0273 in some cases. Ensuring the battery is in good condition and properly charged is essential for the overall health of the vehicle's electrical system.

10. Will resetting the fault codes clear OBDII code C0273 permanently?

- Resetting the fault codes may temporarily clear the C0273 code, but if the underlying issue causing the open in the ABS motor relay circuit is not addressed, the code is likely to reappear. It is crucial to diagnose and repair the root cause of the problem to prevent code recurrence.

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