The most common causes of U164E include: On-board charger (OBC) communication error; Charging port connection issue; DC-DC converter malfunction; Charge controller fault. A professional OBD-II scan tool is recommended for accurate diagnosis.

Recommended steps to address U164E: (1) Schedule service as soon as possible (2) Reduce driving speed and avoid long trips (3) Monitor for additional warning messages (4) Have the vehicle diagnosed by a certified technician. Always consult a qualified EV technician for high-voltage system repairs.

Is it safe to drive with U164E?

Driving with U164E is not recommended for extended distances. Schedule service within a few days to prevent further damage. Monitor for any additional warning lights.

U164E

Warning

Lost Communication with Charging System Control Module

Severity

Warning

What does U164E mean?

Fault code U164E means "Lost Communication with Charging System Control Module". This is a General Motors-specific EV diagnostic trouble code for the GM Ultium / BEV3 platform. It is classified as "charging" with a severity level of "warning". Applicable models: Chevrolet Equinox EV (2024+), Chevrolet Blazer EV (2024+), Honda Prologue (2024+), Cadillac Lyriq (2023+), Chevrolet Silverado EV (2024+).

Possible Causes

On-board charger (OBC) communication error
Charging port connection issue
DC-DC converter malfunction
Charge controller fault

Recommended Actions

1 Schedule service as soon as possible
2 Reduce driving speed and avoid long trips
3 Monitor for additional warning messages
4 Have the vehicle diagnosed by a certified technician