Fuel Injection Control Module Circuit Low Voltage
Findings, check these first
- Weak batteries dropping FICM supply voltage
- Corroded FICM power connections
- Failing FICM power supply
- Excessive cranking voltage drop
- Blown FICM fuse
Standard procedure
- Load-test both batteries first
- Measure FICM voltage KOEO, crank and running (needs 48V)
- Clean FICM power connections
- Check the FICM fuse
- Replace or repair the FICM power supply if voltage stays low
Code lookup
Type a code above, or start from a symptom or a common code.
Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.
Sources and review
Review: checked against the recorded source material.
- OBDII.pro: P1378 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1378: FUEL INJECTOR CONTROL MODULE SYSTEM VOLTAGE LOW
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
- P1378 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1378: Fuel Injection Control Module Circuit Low Voltage
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.
Last updated 2026-09-06.
Report a correction for P1378. Include your vehicle, the issue and a source if you have one.
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