Experiencing a U0140 error code after upgrading your Ford SYNC system? You’re not alone. This frustrating DTC (Diagnostic Trouble Code) often appears as “Lost Communication with BCM” (Body Control Module) and can be triggered by modifications or updates to your vehicle’s electronics, particularly the infotainment system. Let’s dive into understanding and potentially resolving this issue, especially if you’ve recently upgraded your SYNC system in a Ford Escape.
Many Ford owners, particularly those with models like the Ford Escape, have encountered the U0140 code after performing a SYNC upgrade, for example, moving from SYNC 3.0 to SYNC 3.4. In many cases, after such upgrades, while core functionalities like the screen display, navigation, and even steering wheel controls might seem to work correctly, the U0140 error persists. This often stems from configuration mismatches within the vehicle’s communication network.
The U0140 code specifically indicates a communication problem between different modules in your car, in this case, the SYNC module (APIM – Accessory Protocol Interface Module) and the BCM. When you upgrade SYNC, especially if it involves changing the APIM, the new module needs to properly communicate with the existing BCM. If the configuration data is incorrect or incompatible, it can lead to this “lost communication” error.
One common approach, as attempted by some users, is to transfer configuration data from a similar vehicle. While this might restore some functionalities like steering wheel controls or climate control display on the screen, it doesn’t always resolve the underlying communication issue causing the U0140 code. Simply copying APIM values from another car, even a seemingly identical model, can introduce inconsistencies because of subtle differences in vehicle configurations or software versions.
To troubleshoot the U0140 error after a SYNC upgrade, consider these steps:
- Verify APIM Configuration: Double-check the APIM configuration settings using tools like FORScan. Ensure the values are correct for your specific 2015 Ford Escape model and the SYNC 3.4 version you installed. Incorrect settings in modules like 7D0-01-01 can contribute to communication errors.
- Database Compatibility: Confirm that the APIM database you are using is compatible with your 2015 Ford Escape and its specific electrical architecture (CGEA 1.2 or 1.3). While the original poster was unsure about their CGEA version, identifying this is crucial for correct configuration.
- BCM Configuration: Investigate BCM configuration settings related to APIM availability. Although the original poster couldn’t access location 726-44-01, exploring accessible BCM configurations might reveal discrepancies causing the communication fault.
- FORScan Diagnostics: Utilize FORScan to perform a thorough diagnostic scan. Look for any other DTCs related to communication or module incompatibility that might provide further clues.
Resolving the U0140 code after a SYNC upgrade often requires a detailed understanding of your Ford Escape’s electrical system and careful configuration adjustments using tools like FORScan. While copying configurations from similar vehicles can sometimes offer temporary solutions, a proper fix involves ensuring correct and compatible configurations between the APIM and BCM for your specific vehicle. If you’re unsure, seeking assistance from experienced Ford technicians or online communities specializing in Ford diagnostics and modifications can be invaluable.
