Fault code C1141 – a step-by-step guide to diagnosing and fixing it

Error code C1141 is displayed and the check engine light is on - what does this mean?

DTC C1141 is recognized by the OBD system when there is a problem with the ABS hydraulic pump motor relay or its circuit. This fault code relates to the anti-lock braking system and may vary slightly in its exact definition depending on the vehicle manufacturer.

What causes can this fault code have?

• Defective ABS hydraulic pump motor relay
• Damaged wiring to the relay
• Corroded or loose plug connections
• Defective ABS hydraulic pump
• Faulty ABS control unit
• Blown fuse in the ABS circuit
• Short circuit in the relay coil
• Interruption in the power supply

What symptoms occur in parallel with fault code C1141?

• ABS warning light: The ABS indicator light is permanently illuminated in the dashboard
• Loss of ABS function: The anti-lock braking system no longer works properly
• Hard brake pedal feel: The brake pedal feels unusually hard
• Longer braking distances: Braking characteristics deteriorate, especially on slippery surfaces
• ESP malfunction: The electronic stability program may also be impaired
• Unusual noises: Clicking or whirring noises from the ABS area

How can the problem with error code C1141 be rectified?

• The repair requires a systematic diagnosis of the ABS hydraulic system to identify the exact cause.
• Replace the relay: Locate the ABS hydraulic pump motor relay in the fuse box and replace it with a new one, checking its function with a multimeter beforehand
• Repair the wiring: Check all cable connections to the relay and hydraulic pump for damage, corrosion or loose contacts and repair or replace defective areas
• Check fuses: Check the corresponding ABS fuse and replace if necessary, also looking for the cause of the burnout
• Replace the hydraulic pump: If the ABS hydraulic pump is defective, carry out a complete diagnosis and have the pump unit replaced
• Replace ABS control unit: If the ABS control unit is defective, replace it with a new or reconditioned unit and have it programmed
• Complete system diagnostics: Perform complete ABS system diagnostics with a professional OBD scanner and read out all stored fault codes