DTC B1048:11 [BCM]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION AND POSSIBLE CAUSE

DESCRIPTION	Brake fluid level sensor circuit malfunction
DETECTION CONDITION	Short to ground in brake fluid level sensor circuit with the brake fluid amount on the upper side of the minimum
POSSIBLE CAUSE	Connector or terminal malfunction Brake fluid level sensor malfunction Short circuit to ground in wiring harness between brake fluid level sensor terminal A and BCM terminal 1Q BCM malfunction
Courtesy of MAZDA MOTORS CORP.