C0049Brake Fluid Level
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Covers the brake fluid level input to the brake or stability module, used to warn the driver and to disable functions that must not run with low fluid. A float switch or sensor in the master-cylinder reservoir signals when fluid drops below a safe level; the module sets this code and lights the red brake warning indicator. A genuine low level usually means worn brake pads that have drawn fluid into the calipers or a leak in the hydraulic system, but Ford documents cases on 2021-2025 Bronco and 2024 Mustang where a false low-level message with C0049 (sub-types :01, :0A) was caused by the reservoir or its sensor and resolved by replacing the reservoir. Low fluid can disable ABS and stability control; the condition should always be inspected because it can indicate a leak.
- What you may notice
- Red brake warning indicator on
- Low brake fluid message
- ABS and stability control may be disabled
- Likely causes
- LikelyLow fluid from worn pads or a leak
- PossibleFaulty reservoir level sensor or float
- RareReservoir fault causing false reading
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.