U0121 2012 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 2012 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 2012 Ford Fusion Description
Pictures shown may vary from actual
What are the Possible Causes of the DTC U0121 2012 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 2012 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 2012 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 2012 Ford Fusion code?
Need more information on how to fix the U0121 2012 Ford Fusion code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U0121 2012 Ford Fusion code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about U0121 2012 Ford Fusion Code
1. What are the common symptoms of OBDII code U0121 in a 2012 Ford Fusion?
The common symptoms of OBDII code U0121 (Lost Communication With The Anti-lock Brake System Control Module) in a 2012 Ford Fusion include the ABS warning light illuminating on the dashboard, loss of communication with the ABS system, and potential issues with the vehicle's stability control.
2. What can cause the OBDII code U0121 in a 2012 Ford Fusion?
The OBDII code U0121 in a 2012 Ford Fusion is typically caused by wiring issues, damaged connectors, a faulty ABS control module, or a problem with the CAN bus communication system.
3. How can I diagnose the OBDII code U0121 in my 2012 Ford Fusion?
Diagnosing the OBDII code U0121 in a 2012 Ford Fusion involves using a diagnostic scanner to retrieve the specific code, checking the ABS system for any visible damage or loose connections, and testing the communication between the control modules.
4. Can I continue driving my 2012 Ford Fusion with the U0121 code present?
While it may be possible to continue driving your 2012 Ford Fusion with the U0121 code present, it is not recommended as it can affect the performance of the ABS system and compromise the vehicle's safety. It is best to address the issue promptly.
5. How can I repair the U0121 code in my 2012 Ford Fusion?
To repair the U0121 code in a 2012 Ford Fusion, you may need to inspect and repair any damaged wiring or connectors, replace the ABS control module if necessary, or reset the system after resolving communication issues between modules.
6. Are there any DIY tips for fixing the U0121 code in a 2012 Ford Fusion?
While some basic inspections and checks can be done DIY, resolving the U0121 code in a 2012 Ford Fusion may require specialized tools and expertise. It is recommended to consult a professional mechanic for accurate diagnosis and repair.
7. How much does it cost to fix the U0121 code in a 2012 Ford Fusion?
The cost of fixing the U0121 code in a 2012 Ford Fusion can vary depending on the underlying issue, parts needed for repair, and labor costs. It is advisable to obtain quotes from different automotive repair shops for a more accurate estimate.
8. Will resetting the OBDII code U0121 make it go away permanently?
Resetting the OBDII code U0121 in a 2012 Ford Fusion may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem for a permanent solution.
9. Can extreme weather conditions trigger the U0121 code in a 2012 Ford Fusion?
Extreme weather conditions such as excessive heat or cold can potentially impact the wiring and connectors associated with the ABS system, leading to communication issues and triggering the U0121 code in a 2012 Ford Fusion.
10. Is the U0121 code in a 2012 Ford Fusion a serious issue that requires immediate attention?
The U0121 code in a 2012 Ford Fusion indicates a communication problem with the Anti-lock Brake System Control Module, which can affect the vehicle's safety systems. It is considered a serious issue that should be addressed promptly to ensure proper functioning of the ABS system.
Discuss the causes and fixes for U0121 2012 Ford Fusion OBDII Code
Code U0121 2012 Ford Fusion comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
