C1242 Pump Motor Circuit Open

OBD2 Code: C1242

Description: Pump Motor Circuit Open

Definition: This code indicates that there is an open circuit detected in the pump motor circuit of the vehicle’s anti-lock braking system (ABS). The ABS control module has identified a fault with the electrical circuit responsible for powering the pump motor, which can affect the operation of the ABS.

C1242 – Pump Motor Circuit Open

Typical severity: Moderate

Common Causes

C1242 – Pump Motor Circuit Open

Description: This code indicates that there is an open circuit in the pump motor.

Common Causes:

• Faulty ABS pump motor
• Corroded or damaged wiring connections
• Blown fuse related to the ABS system
• Defective ABS control module

 

Common Misdiagnosis

OBD2 Code: C1242

Description: Pump Motor Circuit Open

Common Misdiagnosis: Replacing the pump motor without checking for wiring issues or a faulty relay.

 

Common Diagnostic Steps

OBD2 Code: C1242

Description: Pump Motor Circuit Open

• Check the ABS pump motor fuse for any signs of damage or a blown fuse.
• Inspect the wiring and connectors between the ABS control module and the pump motor for any signs of corrosion, damage, or disconnection.
• Test the pump motor relay to ensure it is functioning correctly.
• Use a multimeter to check for continuity in the pump motor circuit.
• If equipped, use an OBD2 scanner to clear the code and test drive the vehicle to see if it returns.
• If all components appear functional, consider testing or replacing the ABS control module as a last resort.