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Home >> Mazda >> 2021 >> CX-3 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (On-Board Diagnostic - Body Control Module) >> DTC B1048-7B: Brake Fluid Level Sensor Circuit Malfunction >> Notes
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DTC B1048-7B: Brake Fluid Level Sensor Circuit Malfunction: Notes

WARNING: This page is about a different car, the 2016 Mazda CX-3. However, it is still accessible from the selected car via links, so may be relevant.
Description  Brake fluid level sensor circuit malfunction
Detection condition 
  • BCM detected that the brake fluid level is less than MIN with the ignition switched ON (engine off or on).
Fail-safe  Not applicable
Possible cause 
  • Insufficient brake fluid level
  • Brake fluid level sensor connector or terminal malfunction
  • BCM connector or terminal malfunction
  • Short to ground in wiring harness between brake fluid level sensor terminal B and BCM terminal 3R
  • Brake fluid level sensor malfunction
  • BCM malfunction
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