P065A

Symptoms

• Check Engine light comes on
• Unstable or reduced voltage of the on-board network
• Battery discharge during prolonged use
• Flickering or unstable lighting
• Battery or charging indicator on the instrument panel

Causes

• Worn brushes or alternator diode bridge
• Alternator drive belt slipping or worn
• Partial malfunction of the generator windings (stator or rotor)
• Voltage regulator malfunction
• Weak battery with high internal resistance

How to Fix

1. Check the voltage of the on-board network under various loads (headlights, climate, load test)
2. Inspect the alternator belt and its tension
3. Carry out a load test on the generator (charging current at high speed)
4. Check the battery with a load tester
5. Visually inspect the generator for signs of overheating or oil.
6. If there is a malfunction, replace or repair the generator

Related codes

Error P065A by Vehicle Brand