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Home/DTC Codes/Tesla/Model S/2012-2016 85 kWh Single Motor RWD/P2502
P2502

Charging System Voltage

2012-2016 Tesla Model S 85 kWh Single Motor RWD

High SeverityPowertrainGeneric (SAE)

Description

The system charging voltage is outside the expected regulation window.

Symptoms

  • Battery light
  • Check engine light
  • Electrical accessories malfunction
  • Battery drains overnight

Common Causes

  • Failed alternator
  • Loose drive belt
  • Battery terminal corrosion
  • ECM-controlled charging fault

Diagnostic Steps

  1. Check battery voltage engine off and running
  2. Inspect belt tension and condition
  3. Load test alternator
  4. Check battery terminals

Repair Notes

Replace alternator or battery. Clean terminals. Check belt.

Related Codes

P2500Generator Lamp/L Terminal Circuit LowP2503Charging System Voltage Low

Other Powertrain Codes

P2502 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 P2502 mean on a 2012-2016 Tesla Model S?

P2502 stands for "Charging System Voltage". The system charging voltage is outside the expected regulation window.

What are the symptoms of P2502 on a Tesla Model S?

Common symptoms of P2502 include: Battery light, Check engine light, Electrical accessories malfunction, Battery drains overnight.

What causes P2502 on a 2012-2016 Tesla Model S?

Common causes of P2502 include: Failed alternator, Loose drive belt, Battery terminal corrosion, ECM-controlled charging fault.

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