C0221
EPS Control Module Voltage Low
2004-2008 Chrysler Pacifica 4.0L V6
Moderate SeverityChassisGeneric (SAE)
Description
The EPS module supply voltage has dropped below the minimum operating threshold.
Symptoms
- EPS warning light
- Power steering assist reduced
- Assist cuts out during electrical load
- Steering heavy at idle with AC on
Common Causes
- Low battery voltage
- Weak alternator
- High resistance in EPS power supply wiring
- Corroded battery terminals
- Undersized wiring for EPS current demand
Diagnostic Steps
- Measure battery voltage at rest and running
- Test alternator output under load
- Check voltage at EPS module connector
- Inspect battery terminals and cable ends
- Test EPS power supply fuse and connections
Repair Notes
Repair charging system. Clean battery connections. Verify adequate wire gauge to EPS module.
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
C0221 on Other Vehicles
Common Questions
What does code C0221 mean on a 2004-2008 Chrysler Pacifica?
C0221 stands for "EPS Control Module Voltage Low". The EPS module supply voltage has dropped below the minimum operating threshold.
What are the symptoms of C0221 on a Chrysler Pacifica?
Common symptoms of C0221 include: EPS warning light, Power steering assist reduced, Assist cuts out during electrical load, Steering heavy at idle with AC on.
What causes C0221 on a 2004-2008 Chrysler Pacifica?
Common causes of C0221 include: Low battery voltage, Weak alternator, High resistance in EPS power supply wiring, Corroded battery terminals, Undersized wiring for EPS current demand.