how to fix C1201 code on Ford F-150 Fourteenth Generation (2021-present)

Learn how to diagnose and fix C1201 ABS malfunction in Ford F-150. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and safety equipment.
• Ensure the vehicle is parked on a flat surface and securely supported with jack stands if lifting is necessary.

2. Inspect ABS Fuses and Relays

• Tools Required: Fuse tester or multimeter
• Remove the fuse box cover and locate the ABS fuse.
• Use a fuse tester or multimeter to test for continuity.
• Replace any blown fuses.

3. Check Wiring and Connectors

• Visually inspect the wiring harness leading to the ABS module for any signs of wear, fraying, or damage.
• Disconnect the connectors and clean them with electrical cleaner if corrosion is present.
• Reconnect ensuring a snug fit.

4. Test the ABS Module

• Tools Required: OBD-II scanner with ABS capability
• Connect the scanner and access the ABS module.
• Follow the prompts to perform a self-test and check for any new error codes.
• If the module fails the self-test, consider replacing the ABS control module.

5. Inspect and Test Wheel Speed Sensors

• Tools Required: Multimeter
• Locate each wheel speed sensor and disconnect its connector.
• Measure the resistance across the sensor terminals; it should typically be within manufacturer specifications (refer to service manual).
• Clean any debris from the sensor and the sensor ring.
• Replace any faulty sensors.

6. Check Brake Fluid Level

• Open the master cylinder reservoir and check the fluid level.
• If low, top off with the recommended brake fluid type (DOT 3 or DOT 4).
• Inspect for leaks in brake lines or around the master cylinder.