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Home/DTC Codes/Pontiac/Sunfire/1995-2005 2.2L I4/C0222
C0222

EPS Control Module Voltage High

1995-2005 Pontiac Sunfire 2.2L I4

Moderate SeverityChassisGeneric (SAE)

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

  1. Test charging system voltage (should be 13.5-14.7V)
  2. Check alternator voltage regulator
  3. Inspect for aftermarket electrical accessories
  4. Monitor system voltage under various loads

Repair Notes

Repair overcharging alternator. Replace voltage regulator.

Related Codes

C0220EPS Control Module Internal FaultC0221EPS Control Module Voltage Low

Other Chassis Codes

C0222 on Other Vehicles

Pontiac Aztek

2001-2005 3.4L V6

Pontiac Bonneville

2000-2005 3.8L V6

Pontiac Bonneville GXP

2000-2005 4.6L V8

Pontiac Bonneville GXP

2000-2005 4.6L V8 Northstar

Pontiac Firebird

1998-2002 3.8L V6

Pontiac Firebird

1998-2002 5.7L V8 LS1

Pontiac Firebird Trans Am

1998-2002 5.7L V8 LS1

Pontiac Firebird Trans Am WS6

2002-2002 5.7L V8 LS1

Common Questions

What does code C0222 mean on a 1995-2005 Pontiac Sunfire?

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 Pontiac Sunfire?

Common symptoms of C0222 include: EPS warning light, EPS assist may shut down, Warning for electrical system.

What causes C0222 on a 1995-2005 Pontiac Sunfire?

Common causes of C0222 include: Alternator overcharging, Voltage regulator failure, Jump-starting voltage spike, Aftermarket charger connected while running.

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