ShopBaseFree forever shop management software for auto repair shops
Try ShopBase Free →
Home/DTC Codes/Pontiac/Sunfire/1995-2005 2.2L I4/P2504
P2504

Charging System Voltage High

1995-2005 Pontiac Sunfire 2.2L I4

Critical SeverityPowertrainGeneric (SAE)

Description

Charging system output voltage exceeds maximum safe threshold.

Symptoms

  • Battery boiling/swelling
  • Bulbs burning out frequently
  • Check engine light
  • Electrical component damage

Common Causes

  • Failed voltage regulator
  • ECM charging control fault
  • Ground strap issue

Diagnostic Steps

  1. Measure charging voltage at various RPM
  2. Check voltage regulator
  3. Inspect ground straps

Repair Notes

Replace alternator or voltage regulator. Check and repair grounds. Overcharging can damage expensive electronics.

Related Codes

P2502Charging System VoltageP2503Charging System Voltage Low

Other Powertrain Codes

P2504 on Other Vehicles

Pontiac Aztek

2001-2005 3.4L V6

Pontiac Bonneville

1990-1999 3.8L 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 Bonneville SSEi

1992-1999 3.8L Supercharged V6

Pontiac Bonneville SSEi

1992-1999 3.8L V6 Supercharged

Pontiac Firebird

1993-1997 3.4L V6

Common Questions

What does code P2504 mean on a 1995-2005 Pontiac Sunfire?

P2504 stands for "Charging System Voltage High". Charging system output voltage exceeds maximum safe threshold.

What are the symptoms of P2504 on a Pontiac Sunfire?

Common symptoms of P2504 include: Battery boiling/swelling, Bulbs burning out frequently, Check engine light, Electrical component damage.

What causes P2504 on a 1995-2005 Pontiac Sunfire?

Common causes of P2504 include: Failed voltage regulator, ECM charging control fault, Ground strap issue.

View Labor Times | View Torque Specs | View Fluid Specs