C0200high severityChassis
Electric Power Steering Motor Circuit
on 2021 Mazda Mazda3 2.5L Turbo I4 · FWD
What this code means
General malfunction in the electric power steering assist motor circuit.
Symptoms
- Power steering warning light
- Heavy steering
- Steering assist intermittent
- EPS warning message on dash
Common causes
- EPS motor failure
- Motor connector corrosion
- Wiring harness damage
- EPS control module failure
Diagnostic steps
- Check EPS motor connector for corrosion
- Test motor winding resistance
- Inspect wiring harness
- Check module power supply and ground
- Command motor with scan tool if supported
Repair notes
Replace EPS motor or EPS assembly. Some vehicles have motor integrated into steering rack or column.
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