Brake Booster Pressure Sensor Circuit
2000-2002 Rolls-Royce Corniche 6.75L V8 🇩🇪
Description
Malfunction in the brake booster vacuum or pressure sensor circuit.
Symptoms
- Brake warning light on
- Hard brake pedal
- Increased stopping distance
- Check Engine Light may also be on
Common Causes
- Faulty brake booster pressure sensor
- Vacuum hose leak
- Wiring damage
- Brake booster vacuum pump failure on diesel/turbo vehicles
Diagnostic Steps
- Test brake booster vacuum with gauge
- Check vacuum hose to booster
- Test pressure sensor signal
- Inspect wiring and connector
- Check engine vacuum source
Repair Notes
Repair vacuum leak or replace pressure sensor. On diesel vehicles, check vacuum pump.
Related Codes
Other Chassis Codes
- C0021LF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0026RF Wheel Speed Sensor Circuit Intermittent
- C0027LR Wheel Speed Sensor Circuit Intermittent
- C0028RR Wheel Speed Sensor Circuit Intermittent
- C0035Left Front Wheel Speed Sensor Circuit
- C0036Left Front Wheel Speed Signal Erratic
C0090 on Other Vehicles
Rolls-Royce Cullinan
2019-2024 6.75L V12 Twin Turbo
Rolls-Royce Dawn
2016-2024 6.6L V12 Twin Turbo
Rolls-Royce Ghost
2010-2024 6.6L V12 Twin Turbo
Rolls-Royce Phantom VII
2003-2017 6.75L V12
Rolls-Royce Phantom VIII
2018-2024 6.75L V12 Twin Turbo
Rolls-Royce Silver Seraph
1998-2002 5.4L V12
Rolls-Royce Silver Spirit
1990-1998 6.75L V8
Rolls-Royce Silver Spur
1990-1998 6.75L V8
Common Questions
What does code C0090 mean on a 2000-2002 Rolls-Royce Corniche?
C0090 stands for "Brake Booster Pressure Sensor Circuit". Malfunction in the brake booster vacuum or pressure sensor circuit.
What are the symptoms of C0090 on a Rolls-Royce Corniche?
Common symptoms of C0090 include: Brake warning light on, Hard brake pedal, Increased stopping distance, Check Engine Light may also be on.
What causes C0090 on a 2000-2002 Rolls-Royce Corniche?
Common causes of C0090 include: Faulty brake booster pressure sensor, Vacuum hose leak, Wiring damage, Brake booster vacuum pump failure on diesel/turbo vehicles.