P063D

Symptoms

• Check Engine light comes on
• High voltage on-board network (above 15 V)
• Flashing or burning out lamps
• Battery overheating
• Incorrect operation of electronic components

Causes

• Short circuit of the sensor signal wire to power supply positive
• Generator voltage regulator malfunction
• Damage to the wiring insulation in the harness
• Lost contact in the connector (accidental contact with positive)
• ECU malfunction

How to Fix

1. Measure the actual on-board voltage with a multimeter
2. Check the sensor signal wire for a short circuit with the positive wire
3. Inspect the generator wiring harness for damaged insulation.
4. Check generator voltage regulator
5. If a regulator malfunction is confirmed, replace the regulator or generator

Related codes

Error P063D by Vehicle Brand