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Autodata Technical Issue 1 - Electrical Fault on 2010 Volkswagen Polo 1.2

Autodata Technical Issue 1 - Electrical Fault on 2010 Volkswagen Polo 1.2

30 January 2017

Each month, the Autodata team will be answering a common technical question through a handy printable document, which includes diagrams.

Issue 1 solves a problem diagnosing an electrical fault on a 2010 Volkswagen Polo 1.2.

Q. “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 fault codes that relate to low battery voltage. We have changed the main vehicle battery and the vehicle will still not start. Can you help?”


A. The symptoms you describe are common on all Polo (6R1) models and the cause is 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.

Click Here To Download the PDF version

This PDF (and the issues to follow) will also be available to download or print at any time through the Members Area of the IGA website.

Take advantage of our exclusive member offer for Autodata online and combine your trade association membership with Autodata Diagnostic & Repair - call our member helpline on 0845 305 4230 for more information.