EPS Control Module Voltage High
2000-2002 Rolls-Royce Corniche 6.75L V8 🇨🇦
Description
The EPS module supply voltage exceeds the maximum safe operating threshold.
Symptoms
- EPS warning light
- EPS assist may shut down
- Warning for electrical system
Common Causes
- Alternator overcharging
- Voltage regulator failure
- Jump-starting voltage spike
- Aftermarket charger connected while running
Diagnostic Steps
- Test charging system voltage (should be 13.5-14.7V)
- Check alternator voltage regulator
- Inspect for aftermarket electrical accessories
- Monitor system voltage under various loads
Repair Notes
Repair overcharging alternator. Replace voltage regulator.
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
C0222 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 Spectre
2023-2024 Electric AWD
Rolls-Royce Wraith
2014-2024 6.6L V12 Twin Turbo
Common Questions
What does code C0222 mean on a 2000-2002 Rolls-Royce Corniche?
C0222 stands for "EPS Control Module Voltage High". The EPS module supply voltage exceeds the maximum safe operating threshold.
What are the symptoms of C0222 on a Rolls-Royce Corniche?
Common symptoms of C0222 include: EPS warning light, EPS assist may shut down, Warning for electrical system.
What causes C0222 on a 2000-2002 Rolls-Royce Corniche?
Common causes of C0222 include: Alternator overcharging, Voltage regulator failure, Jump-starting voltage spike, Aftermarket charger connected while running.