C0222moderate severityChassis
EPS Control Module Voltage High
on 2015 Kia Forte 1.8L I4 · FWD
What this code means
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.
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