The most common causes of B1A1F 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.

Recommended steps to address B1A1F: (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 B1A1F?

Driving with B1A1F is not recommended for extended distances. Schedule service within a few days to prevent further damage. Monitor for any additional warning lights.

B1A1F

Warning

Wireless Communication Module Short Circuit to Ground

Severity

Warning

What does B1A1F mean?

Fault code B1A1F means "Wireless Communication Module Short Circuit to Ground". This is a General Motors-specific EV diagnostic trouble code for the GM Ultium / BEV3 platform. It is classified as "network" 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

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 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