P2504

Charging System Voltage High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–222 (est.)

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

P2503 P2505 P0562