Brake Assist Solenoid Circuit
1998-2002 Rolls-Royce Silver Seraph 5.4L V12
Description
Malfunction in the brake assist solenoid that provides additional brake pressure during emergency stops.
Symptoms
- Brake assist inactive
- Warning light for brake assist
- Longer stopping distance in emergencies
Common Causes
- Faulty brake assist solenoid
- Solenoid wiring open or shorted
- Module driver failure
- Solenoid mechanically stuck
Diagnostic Steps
- Test solenoid resistance
- Check wiring to solenoid
- Command solenoid with scan tool
- Inspect for mechanical binding
- Test module output signal
Repair Notes
Replace brake assist solenoid or repair wiring.
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
C0146 on Other Vehicles
Rolls-Royce Corniche
2000-2002 6.75L V8
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 Spirit
1990-1998 6.75L V8
Rolls-Royce Silver Spur
1990-1998 6.75L V8
Common Questions
What does code C0146 mean on a 1998-2002 Rolls-Royce Silver Seraph?
C0146 stands for "Brake Assist Solenoid Circuit". Malfunction in the brake assist solenoid that provides additional brake pressure during emergency stops.
What are the symptoms of C0146 on a Rolls-Royce Silver Seraph?
Common symptoms of C0146 include: Brake assist inactive, Warning light for brake assist, Longer stopping distance in emergencies.
What causes C0146 on a 1998-2002 Rolls-Royce Silver Seraph?
Common causes of C0146 include: Faulty brake assist solenoid, Solenoid wiring open or shorted, Module driver failure, Solenoid mechanically stuck.