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DTC B1048 7B: Brake Fluid Level Sensor Circuit Malfunction: Notes

WARNING: This page is about a different car, the 2014 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1048 7B DETECTION CONDITION AND POSSIBLE CAUSE

Description  Brake fluid level sensor circuit malfunction 
Detection condition 
  • Front body control module (FBCM) detected that the brake fluid level is less than MIN with the ignition switched ON (engine off or on).
Fail-safe function  Not applicable
Possible cause 
  • Insufficient brake fluid level
  • Brake fluid level sensor connector or terminal malfunction
  • Front body control module (FBCM) connector or terminal malfunction
  • Short to ground in wiring harness between brake fluid level sensor terminal A and front body control module (FBCM) terminal 2Q
  • Brake fluid level sensor malfunction
  • Front body control module (FBCM) malfunction
G09771786Courtesy of MAZDA MOTORS CORP.