Unless you have a scan tool or have a friend that has one. You will need to send it in for diagnostics. A code reader may provide some information but will not show live data. The EPC warning light, also known as the Electronic Power Control warning light. The PCM has identified a fault with your Volkswagen's throttle system. The throttle pedal, throttle body, traction control, cruise control or wiring could be to blame.
SOURCE: 2001 volkswagen golf epc light on loss of power
i had the same problem... Change the spark plugs and the ignition coils, All of them... It usually accelerates without giving it gas.. Don't worry about that...
SOURCE: i have codes po 638, 121, 221 does all these mean
I believe it's all related to youe brake light switch. There is a recall on it. It sticks and causes the epc kight to flash, also causing your other stated issues. If recall working has been done, buy the dealer switch. It's easy to replace.
SOURCE: Audi A4 ESP problem
loss of power sure car is breaking !!! some of the abs sensor broken or dirty
SOURCE: 2002 VW Polo - EPC Light and Loss of Power
Hi,
It is a wiring fault, but they are looking on the wrong end. You will need to have a VW dealer "repin" the electrical connector at the throttle body. What this means is, the dealer will take apart the connector, cut off the old pins and crimp on new ones and reassemble the connector. This is a common problem on drive by wire VW's. The dealer has a bulletin on the problem and I don't know why they missed it. They will probably have to order the connector kit however. Good luck!
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