U1021 Ford Code - Lost Communication With Anti-Lock Brake System Control Module
Quick Answer
The Diagnostic Trouble Code (DTC) sets in the Powertrain Control Module (PCM) if data messages received from the Anti-Lock Brake System (ABS) Control Module over the HS-CAN2 is missing. Common causes include Faulty Anti-Lock Brake System (ABS) Control Module, Anti-Lock Brake System Control Module harness is open or shorted, Anti-Lock Brake System Control Module circuit poor electrical connection. 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
- U1021 Ford indicates Lost Communication With Anti-Lock Brake System Control Module.
- Common causes
- Common causes include Faulty Anti-Lock Brake System (ABS) Control Module, Anti-Lock Brake System Control Module harness is open or shorted, Anti-Lock Brake System Control Module circuit poor electrical connection.
- 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.
Code U1021 Ford Description
What are the Possible Causes of the DTC U1021 Ford?
- Faulty Anti-Lock Brake System (ABS) Control Module
- Anti-Lock Brake System Control Module harness is open or shorted
- Anti-Lock Brake System Control Module circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC U1021 Ford?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U1021 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about U1021 Ford Code
1. What are the common symptoms of OBDII code U1021 in a Ford vehicle?
- Common symptoms include the ABS warning light being illuminated on the dashboard, loss of ABS functionality, and potential issues with the vehicle's traction control system.
2. What does the OBDII code U1021 in a Ford mean?
- The code U1021 indicates a communication problem between the vehicle's onboard diagnostics system and the Anti-Lock Brake System Control Module.
3. What are some possible causes of OBDII code U1021 in a Ford?
- The code U1021 can be triggered by issues such as a faulty ABS control module, damaged wiring or connectors, a blown fuse, or a problem with the vehicle's CAN (Controller Area Network) communication system.
4. How can I diagnose the OBDII code U1021 in my Ford vehicle?
- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking the ABS control module for any visible damage, inspecting wiring and connectors for faults, and testing the vehicle's CAN system for communication issues.
5. Can I continue driving my Ford with the OBDII code U1021 present?
- It is not recommended to continue driving the vehicle with the U1021 code active, as it may compromise the effectiveness of the ABS system and other safety features.
6. How can I repair OBDII code U1021 in my Ford?
- Repair options may include replacing the ABS control module, repairing or replacing damaged wiring or connectors, checking and replacing any blown fuses, and ensuring proper communication within the CAN system.
7. Will resetting the OBDII code U1021 make it go away permanently?
- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the U1021 code is not addressed, it is likely to reappear.
8. Can a DIY enthusiast fix the OBDII code U1021 issue in a Ford?
- Depending on the root cause of the problem, some DIY enthusiasts with the necessary tools and knowledge may be able to address issues related to the U1021 code, such as checking wiring connections or replacing fuses.
9. How much does it typically cost to repair OBDII code U1021 in a Ford at a repair shop?
- Repair costs can vary significantly depending on the specific cause of the U1021 code, but they may range from a few hundred to over a thousand dollars, including parts and labor.
10. How important is it to address the OBDII code U1021 in a Ford promptly?
- It is crucial to address the U1021 code promptly to ensure the proper functioning of the ABS system and maintain the overall safety of the vehicle, as ABS plays a critical role in emergency braking and vehicle stability.
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