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Home/DTC Codes/Tesla/Model S/2014-2016 P85D Dual Motor AWD/P2504
P2504

Charging System Voltage High

2014-2016 Tesla Model S P85D Dual Motor AWD

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

Tesla Cybertruck

2024-2024 Cyberbeast Tri Motor AWD

Tesla Cybertruck

2024-2024 Dual Motor AWD

Tesla Cybertruck

2024-2024 Single Motor RWD

Tesla Model 3

2017-2020 Long Range Dual Motor AWD

Tesla Model 3

2017-2020 Performance Dual Motor AWD

Tesla Model 3

2017-2020 Standard Range Plus Single Motor RWD

Tesla Model 3

2021-2024 Long Range Dual Motor AWD

Tesla Model 3

2021-2024 Performance Dual Motor AWD

Common Questions

What does code P2504 mean on a 2014-2016 Tesla Model S?

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

What are the symptoms of P2504 on a Tesla Model S?

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

What causes P2504 on a 2014-2016 Tesla Model S?

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

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