U0121 2009 Ford Fusion Code - Lost Communication With The Anti-lock Brake System Control Module
Quick Answer
The Powertrain Control Module (PCM) continuously monitors the Controller Area Network (CAN) for messages from the ABS. Common causes include Damaged CAN communication bus circuit, Faulty Anti-lock Brake System (ABS) Control Module, Anti-lock Brake System Control Module harness is open or shorted. 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
- U0121 2009 Ford Fusion indicates Lost Communication With The Anti-lock Brake System Control Module.
- Common causes
- Common causes include Damaged CAN communication bus circuit, Faulty Anti-lock Brake System (ABS) Control Module, Anti-lock Brake System Control Module harness is open or shorted.
- 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 U0121 2009 Ford Fusion Description
Pictures shown may vary from actual
What are the Possible Causes of the DTC U0121 2009 Ford Fusion?
- Damaged CAN communication bus circuit
- 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 U0121 2009 Ford Fusion?
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 U0121 2009 Ford Fusion 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.
Need more information about the U0121 2009 Ford Fusion code?
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Frequently Asked Questions about U0121 2009 Ford Fusion Code
1. What are the common symptoms of OBDII code U0121 in a 2009 Ford Fusion?
The common symptoms include the ABS warning light illuminating on the dashboard, loss of communication with the ABS control module, and possible issues with the vehicle's stability control system.
2. What does the U0121 code mean for a 2009 Ford Fusion?
The U0121 code indicates that there is a communication problem between the vehicle's engine control module (ECM) and the anti-lock brake system (ABS) control module.
3. What are some possible causes of the U0121 code in a 2009 Ford Fusion?
Possible causes include damaged or frayed wiring, loose connections, a faulty ABS control module, a malfunctioning ECM, or a blown fuse related to the ABS system.
4. How can I diagnose the U0121 code in my 2009 Ford Fusion?
Diagnosing the U0121 code typically involves checking the wiring and connections related to the ABS system, inspecting the ABS control module for any signs of damage, and using a diagnostic scanner to communicate with the ABS module.
5. Can I still drive my 2009 Ford Fusion with the U0121 code present?
It is not recommended to drive the vehicle with the U0121 code present, as it may affect the functionality of the ABS system and compromise the vehicle's safety features.
6. How can I repair the U0121 code in my 2009 Ford Fusion?
Repairing the U0121 code may involve repairing or replacing damaged wiring, ensuring all connections are secure, replacing the ABS control module if necessary, or addressing any underlying issues with the ECM.
7. Is it safe to continue driving if the ABS warning light is on due to the U0121 code?
Driving with the ABS warning light on is not recommended, as it indicates a potential issue with the anti-lock brake system, which could affect the vehicle's braking performance and overall safety.
8. Can a DIY enthusiast fix the U0121 code in a 2009 Ford Fusion?
While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the U0121 code may require specialized tools and expertise, so it is advisable to consult a professional mechanic.
9. How much does it cost to repair the U0121 code in a 2009 Ford Fusion?
The cost of repairing the U0121 code can vary depending on the underlying issue, parts needed for replacement, and labor costs. It is recommended to get a diagnostic assessment from a mechanic for an accurate repair estimate.
10. Will resetting the U0121 code make it go away permanently?
Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing the U0121 code is not addressed, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem.
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