Check engine light and epc light is always on car just has no power
When these lights are on it is indicating a fault has occurred in the powertrain, the 1st thing you need to do is have the powertrain control module read for the fault codes that were stored when the computer turned on the warning lights.
SOURCE: epc light comes on some times with loss of power
The best way to determine the problem is to get the trouble codes read.
The most common issues are the brake switch (actually on your brake pedal) and the MAF (Mass Airflow Sensor). Since you're experiencing a loss of power I would definitely go with the MAF.
If you were having trouble shifting out of park (if you have an auto) I would say brake switch (this switch has been recalled by vw 2x).
Getting the fault codes read would definitely narrow it down, but I'm betting on the MAF.
Please rate/vote! Thanks!
SOURCE: 2005 New Jetta and My EPC light
I had this same exact problem a few months ago. My mechanic replaced the Crank Speed Sensor, reset my codes - and all was good again. Cost less than $100.
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!
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...
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