Problem:
We are having problems diagnosing an electrical fault on a 2010 Volkswagen Polo 1,2. The vehicle cranks but won't start and the alternator warning lamp is illuminated. Our scanner has read several faults codes that relate to low battery voltage. We have charged the main vehicle battery and the vehicle will still not start. Can you help?
Solutions:
- The symptoms you describe are common on all Polo (6R1) models and the cause is a poor connection between the engine earth lead and chassis earth point due to corrosion.
- Check for corrosion between the engine earth lead and chassis earth point. Replace component(s) as necessary.
- Fit a new earth lead stud on the engine mounting and tighten the stud to the correct torque setting. Check the vehicle starts and erase all fault codes.
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