Warning light EPC

Tiny
JYOUNG123
  • MEMBER
  • 2013 VOLKSWAGEN JETTA
  • 2.5L
  • 5 CYL
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
After I picked up my car from the mechanic for a rough idle issue, he said it was a vacuum leak and replaced something, I should have asked. I planned a drive and after about 40 minutes the EPC light came on. I continued to my destination. The car felt fine. After about 30 minutes I started the car and the EPC light was off but the 4-way emergency flashers didn't work. The signals were fine. There's quite a list of possible issues. Any knowledge/direction would be great. Thank you
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Tuesday, May 11th, 2021 AT 6:16 PM

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Tiny
KASEKENNY1
  • EXPERT
The EPC light is for the Electronic Power Control system. Normally this means there is an issue with the cruise control, throttle position sensor, throttle body or something related.

However, the next step is to check for any codes as we will need to know where to start.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

The flashers may be related to this but we need to start with codes and go from there.

If there are no codes then we can tackle the flashers next. I am attaching the wiring diagrams for the flashers if we want to jump to it anyway and check voltage from the button to the VES control module.

https://www.2carpros.com/articles/how-to-check-wiring

Let us know what you find with this this. Thanks
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Thursday, May 13th, 2021 AT 5:39 PM

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