I have a 2001 passat volkswagon and the epc light comes on the the car idles high and hard to start what do i do ?

run the fault codes
indications are injector problems either wiring , or blockage
check fuel pressure as it could also be from low fuel pressure , problem pressure regulator , blocked filter or EVAP venting problem

Have the fault codes read and replace faulty sensors

hello : my proplem is began after i drive my passat 5 kilometer the EPC yellow light is appear and i dont know what that mean . thanks foer your help .. my passat 2003 model petrol . 2000 cc .
Rami Safran
PALESTINE

Multiple faults can cause this.

With this being an ongoing problem you need a shop to scan the systems.

EPC is the Electronic Power Control....or throttle pedal and throttle body.
When fault detected engine will only idle.

Dirty throttle body is often cause of no power or gear engagement with EPC lamp illuminated.

Find a shop here: http://www.iatn.net/shopfinder/

EPC refers to the drive by wire system. This system, generally speaking, encompasses the throttle pedal and its position sensors (it needs to know where your gassin' foot is) and the throttle body.

Most likely, the EPC light and its associated faults for this scenario are a symptom, not the problem. Meaning the actual root cause is causing the no-start/no crank issue AND fault codes related to the EPC system.

And the most likely root cause is an ignition switch, NOT the engine speed sensor.

With a bad engine speed sensor, the car will still crank all damn day (or until the battery dies) but the car won't start.

If you get a no-crank issue, and then it eventually starts either with or without an EPC light, again, the most likely problem is the ignition switch. Not the starter, not the battery (though the battery proper and the cable connections must be perfection itself to rule them out.) You can get these issues with a visually perfect but still faulty battery connection.

EPC means Electronic Power Control (aka; Drive by wire) it means there is no throttle cable, it's all electronic. It can be illuminated by any error that has to do with this system. Use an OBD II tool or VAG-COM cable to check the error codes.

throttle is probably going out you can try to clean it but they are usually bad when the epc light is on

Your EPC stands for "Electronic Power Control" and without it (bypassing it, as you stated), you will not be going anywhere in your car. The car MUST have the EPC on/enabled to run, as I have been told. The VW Passat does not have a throttle cable... it is controlled electronically. The EPC light means something is wrong in the drive-by-wire path, the "gas pedal" potentiometers or the electric motor-controlled throttle body, etc. You will need to take it to a mechanic/repair shop that is knowledgable in foreign automobiles (especially VW's) and has the appropriate tools and equipment to read any "codes" being kicked out by the computer.

I have a 2001 New Passat with the EPC light coming on randomly and it will idle high but next time I start the car it goes away. I think you will have to take it in to the dealer.

It sounds like the engine is starving for either fuel or air. Replace the Air cleaner and Fuel filters and this may solve the problem.

Electronic Power Control is what epc means. this could mean a brake light or a bad brake light switch check your lights. If that is fine you must have it check out by a tech