BMW DTC P2504 – Charging System Voltage High
DTC P2504 meaning on BMW
The Diagnostic Trouble Code (DTC) P2504 for BMW indicates a fault in the charging system related to high voltage. This code is triggered when the Engine Control Module (ECM) detects that the voltage in the vehicle’s charging system is above the specified threshold.
BMW DTC P2504 symptoms
Symptoms of DTC P2504 on a BMW may include:
- Dashboard warning light related to the charging system
- Dimming or flickering lights
- Battery overcharging
- Electrical system malfunctions
BMW DTC P2504 causes
Common causes of DTC P2504 on a BMW include:
- Defective voltage regulator
- Faulty alternator
- Wiring issues in the charging system
- Corroded battery terminals
BMW DTC P2504 seriousness
Ignoring DTC P2504 on a BMW can lead to potential damage to the vehicle’s electrical components and the battery. It is important to address this issue promptly to prevent further complications and ensure the proper functioning of the charging system.
How to diagnose DTC P2504 on BMW
To diagnose DTC P2504 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code
- Inspect the alternator and voltage regulator for any visible signs of damage
- Check the battery voltage and charging system output
- Inspect the wiring and connections in the charging system
How to fix DTC P2504 on BMW
To fix DTC P2504 on a BMW, the following steps may be taken:
- Replace the faulty voltage regulator or alternator
- Repair any damaged wiring or connections in the charging system
- Clean or replace corroded battery terminals
- Perform a charging system test to ensure proper operation
How to erase DTC P2504 on BMW
To erase DTC P2504 on a BMW, the fault code can be cleared using a diagnostic scanner. After addressing the underlying issue causing the fault code, the ECM can be reset to clear the code and turn off the warning light.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.