P2504
Charging System Voltage High
P2504 is an OBD-II diagnostic trouble code meaning: Charging System Voltage High. Common causes: generator malfunction, problems with the voltage regulator. Estimated repair cost: $56–222.
Symptoms
- Check Engine Light Is On
- Recharging the battery
- Burnout of light bulbs and other electronic components
- Unstable operation of electrical equipment
- Burning smell from electrical equipment
Causes
- Generator malfunction
- Problems with the voltage regulator
- Short circuit in the electrical circuit
- Wiring harness damage
- Engine control unit malfunction
How to Fix
- Check the voltage at the battery terminals with the engine running
- Check the condition of the alternator and alternator belt
- Check voltage regulator
- Inspect electrical connections and wiring harness
- If necessary, replace the generator or voltage regulator
Related codes
Error P2504 by Vehicle Brand
FAQ
What does the P2504 code mean?
P2504 is an OBD-II diagnostic trouble code that indicates: Charging System Voltage High
What causes a P2504 error code?
The most common causes of P2504 include: Generator malfunction; Problems with the voltage regulator; Short circuit in the electrical circuit; Wiring harness damage.
How do I fix a P2504 diagnostic trouble code?
To fix P2504: Check the voltage at the battery terminals with the engine running. Check the condition of the alternator and alternator belt. Check voltage regulator. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2504?
Do not drive — repair immediately
How much does it cost to fix P2504?
The estimated repair cost for P2504 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
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