Battery, charging and glow plugs

P0563 Charging voltage too high

By: Diagno editorial team · Updated: 2026-10-15

P0563 means: Charging voltage too high. Battery voltage is too high. Drive gently and have the car checked soon. The repair usually costs about €80–500 in Estonia. The most common cause: alternator voltage regulator has failed. Other possible causes: poor earth, battery has failed. Measure the voltage with the engine running. Over 15 V is too much.

Is it safe to drive?Get it checked soonDrive gently and have the car checked soon.

Typical repair cost€80–500parts and labour in Estonia

What it means

Battery voltage is too high. Usually the alternator is overcharging. This can damage the battery and electronics.

What could be wrong

1Alternator voltage regulator has failed
2Poor earth
3Battery has failed

What you can check yourself

Measure the voltage with the engine running. Over 15 V is too much. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

We measure the charging voltage
We check the earth connections
We replace the voltage regulator or alternator

Standard SAE description: System Voltage High

This code usually comes with: Battery (charging) lightSee what the light means →Check the fuse · If a light, the horn, wipers, a socket or the fuel pump is dead, a blown fuse may be the cause.Fuse boxes by car →

Want a definite answer?

Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.

Book a diagnostic check

Questions

What does fault code P0563 mean?

Charging voltage too high. Battery voltage is too high. Usually the alternator is overcharging. This can damage the battery and electronics.

Can I drive with code P0563?

Drive gently and have the car checked soon.

How much does it cost to fix P0563?

Roughly €80–500 in Estonia. The price depends on exactly what has failed and on the car.

How is P0563 fixed?

We measure the charging voltage. We check the earth connections. We replace the voltage regulator or alternator.

Based on AI combined with our hands-on workshop experience and knowledge. This information is general and prices are approximate (Estonian workshop rates). The same code can mean different things on different cars. Only an inspection of the car gives a definite answer.