HI. This EPC light can be a indication of failure that will concern several points of this vehicle. I will list them below:
1. Loose or incorrectly applied gas cap
2. Emissions system failure
3. Faulty Catalytic Converter device
4. Weak battery<-----(Likely culprit)
5. Exhaust sensor failures
6.Monitoring sensor(s) failure
With that said; The most common fault will be a weak battery. The best actions are to administer a diagnostic scan. This can be achieved at your local auto-zone store or your local dealership. The scan tool will extract the necessary codes and isolate the culprit, easily. I recommend to allow the dealer to administer the scan, due to the fact that, there are several specialized Volkswagen codes that some basic scan tools will not retrieve, properly. make sure that you are dealing with a competent mechanic, also.
- NOTE_ Have the battery tested at your local auto parts store for a defective cell. If it proves to be ok; Move on to the diagnostic scan procedure to extract the necessary trouble codes needed to isolate the culprit.
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