The most common causes of U0100 include: CAN bus communication timeout; Control module offline or not responding; Wiring harness damage or short circuit; Software version mismatch between modules. A professional OBD-II scan tool is recommended for accurate diagnosis.

How do I fix U0100 for Ford E-Transit?

Recommended steps to address U0100: (1) Schedule a diagnostic check within the next week (2) Monitor the issue for any changes (3) Check for software updates at your next service visit (4) Document any symptoms for the technician. Always consult a qualified EV technician for high-voltage system repairs.

Is it safe to drive with U0100?

U0100 is a caution-level code. It is generally safe to continue driving short distances, but have it inspected at your next scheduled service visit.

Ford E-Transit

U0100

Caution

Lost Communication with ECM/PCM A

Severity

Caution

What does U0100 mean?

Fault code U0100 means "Lost Communication with ECM/PCM A". This is a Ford-specific EV diagnostic trouble code for the Ford GE1 / Blue Oval BEV platform. It is classified as "network" with a severity level of "caution". Applicable models: Mustang Mach-E, F-150 Lightning, E-Transit.

Possible Causes

CAN bus communication timeout
Control module offline or not responding
Wiring harness damage or short circuit
Software version mismatch between modules

Recommended Actions

1 Schedule a diagnostic check within the next week
2 Monitor the issue for any changes
3 Check for software updates at your next service visit
4 Document any symptoms for the technician

This code applies to all vehicles. View generic U0100 information →