Code U0102 on the 2023 Ford F-150 indicates lost communication with the fuel injector control module. On diesel F-150 models and some gasoline direct injection systems, this separate module manages precise injector timing and control beyond basic ECM functions.
Fuel Injector Control System
Modern fuel injection systems, particularly diesel and gasoline direct injection, require precise injector control for proper combustion, emissions, and fuel economy. The fuel injector control module (FICM or similar) receives commands from the PCM and translates them into the high-voltage, precisely-timed signals needed to actuate injectors.
Symptoms Present
With U0102 active, the engine may run roughly, misfire, or fail to start entirely. The check engine light illuminates, and you may notice decreased power, poor fuel economy, or excessive smoke on diesel models. The engine management system cannot properly control fuel delivery without communication with the injector control module.
Common Failure Points
Check module power supply first - these modules often have separate fuses and relays. The connector at the module can suffer from heat exposure and vibration damage. On diesel applications, the FICM is a known failure item and may require replacement. Wiring harness damage between the PCM and injector control module is also possible.
Repair Approach
Verify power and ground at the injector control module. Test communication signals between the PCM and the module. If the module has failed, replacement requires proper initialization. Ford IDS is typically needed for complete module programming and injector calibration codes input.