C0047Brake Booster Pressure Sensor
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Covers the pressure sensor in the power brake booster or brake actuation unit, which measures boost or assist pressure so the module can regulate assist and detect loss of boost. The module monitors the sensor for a signal outside the valid range, an open or short and values that disagree with pedal demand or master-cylinder pressure. Ford documents C0047:64 on 2020 Explorer and Lincoln Aviator, where it is stored in the ABS module with a noticeable loss of power brake assist or a soft, long brake pedal just after start-up. A fault reduces or disables controlled assist and sets the brake or ABS warning lamp; the driver may feel a harder, longer pedal until assist is restored.
- What you may notice
- Lack of power brake assist
- Soft or extended pedal at start-up
- ABS or brake warning lamp on
- Likely causes
- LikelyBooster pressure sensor out of range
- PossibleModule calibration or software issue
- RareHarness or connector fault
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €200 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.