C0220high severityChassis
EPS Control Module Internal Fault
on 2019 GMC Acadia 3.6L V6 · FWD
What this code means
The electric power steering control module has detected an internal error.
Symptoms
- EPS warning light
- Reduced or no power steering assist
- EPS assist may be intermittent
- Warning message on dash
Common causes
- EPS module internal component failure
- Module overheating
- Software error
- Power supply voltage spike or drop
Diagnostic steps
- Check module power supply voltage
- Inspect module grounds
- Check for module overheating
- Attempt module reset by cycling ignition
- Check for software update availability
Repair notes
Replace EPS control module. Program and calibrate after installation.
Other Chassis codes on this vehicle
C0021
LF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0023
LR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0025
LF Wheel Speed Sensor Circuit Intermittent
C0026
RF Wheel Speed Sensor Circuit Intermittent
C0027
LR Wheel Speed Sensor Circuit Intermittent
C0028
RR Wheel Speed Sensor Circuit Intermittent
C0035
Left Front Wheel Speed Sensor Circuit
C0036
Left Front Wheel Speed Signal Erratic