C0273 Open in ABS Motor Relay Circuit

Definition: The OBD2 code C0273 indicates an open circuit in the ABS motor relay. This means that there is a break or disconnection in the electrical circuit that controls the anti-lock braking system (ABS) motor relay, which can affect the functionality of the ABS.

C0273 – Open in ABS Motor Relay Circuit

Typical Severity: Moderate

Common Causes

C0273 – Open in ABS Motor Relay Circuit

Common causes:

• Faulty ABS motor relay
• Corroded or loose electrical connections related to the ABS motor relay
• Short circuit in the wiring of the ABS motor relay circuit
• Defective ABS control module

 

Common Misdiagnosis

OBD2 Code: C0273

Description: Open in ABS Motor Relay Circuit

Common Misdiagnosis: Replacing the ABS motor relay without checking for wiring issues or connector problems.

 

Common Diagnostic Steps

OBD2 Code: C0273

Description: Open in ABS Motor Relay Circuit

• Check the ABS motor relay fuse for any signs of damage or a blown fuse. Replace if necessary.
• Inspect the wiring and connectors leading to the ABS motor relay for any signs of corrosion, damage, or disconnection. Repair or replace as needed.
• Test the ABS motor relay itself by checking for continuity and proper operation. Replace the relay if it is faulty.
• Examine the ABS control module for any faults or issues that may affect its communication with the motor relay circuit. Consider reprogramming or replacing the module if required.
• Use a diagnostic scanner to clear any stored codes and test drive the vehicle to see if the code returns, indicating an unresolved issue.