I tried searching "EPC" and nothing came up? Anyhow I was lightly accelerating from a stop this morning in my 18' GTI 6MT with 6500 miles when the light came on and suddenly lost 50% or more power as it felt. Car was shuttering and hard to accelerate.
Pulled off to the side of the road and shut her down. Now I've perused through the owners manual since I purchased the car but did not recall what this light indicated. Looked it up, started car and the light did not return. Car seemed to run/idle somewhat normal but still shuttered during acceleration in all gears.
Has anyone else had this symptom and if so what was the verdict? Service writer of course has never heard of this before.
A bit frustrating for a 6 month old car.
I have been experiencing the exact same issue in my 2016 S, intermittently for the last few months, say one out of every 20+ starts. Turning the car off immediately and restarting clears the issue for that spell.
In my case, the EPC light, combined with shuddering and power loss, indicated random misfires of cylinders 1 and 3, per OBDeleven scan.
I first replaced the Denso plugs APR used to recommend to the NGK’s they now recommend. They were due to be replaced anyway.
Same sporadic symptoms reappeared, so I replaced the OEM coils with RS3 coils. I like them so far, they are smooth and lively.
After 40K miles running stage 2 tune, my shop and I wondered if that wasn’t causing those components to short, so I started there. They were easy swaps in the driveway.
Symptoms reoccurred this week, so I updated the tune to APR’s v1.2 today. I’ve been running the original tune since 2016, so updating was a good idea anyway.
We’ll see if that fixes it, or if compression or other checks are next. Although, if there were a compression leak, I would expect issue to be less sporadic, and not cured by simply restarting.
Your experience sounds similar to mine, respective to the code, shudder, and power loss, so I wouldn’t be surprised if your dealership’s scan indicated misfires at those two cylinders.
The scan can indicate misfires, timing retardation, etc, but doesn’t always indicate the cause, so they may use process of elimination until they confirm it solved. No harm letting them replace what they suggest, on their nickel.
Sucks you are having to deal with that only 6 months in. Hopefully they’ll resolve it quickly.
Good luck, keep us posted.
Sent from my iPhone using Tapatalk
