2003 VW Jetta's lights go off inside and on dash, and then just stops altogether (engine goes as well). Have had fuse box replaced a month ago but had same problem again, and also the battery seems to drain very quickly.
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EPC light should have nothing to do with the shift interlock,(EPC is traction control) should be a small cap or plug on the console, near the shifter that has the interlock disengage button,usually done with a key,check shift interlock in the owners manual.
a bad ground cable.,or the battery has damaged plates inside which may fail when the battery is under a load. check the battery cables,terminals and the main ground from the battery to the car.
you could also use jumper cables,and ground the battery to the engine block.
Try disconnecting the battery (unhook on of the terminals) wait for like 15 mins, hook the terminal once again and start the car. I also own a 2003 Jetta and once my engine light would come on after 2 mins of driving. Disconnecting the battery is like resetting the computer and hopefully the sensor.
You've lost engine coolant somewhere, and need to fill the engine back up with the VW special G12 coolant.
Then find the leak, which will be in one or more of the following places - Water hoses to heater core, including any other coolant carrying hoses in the engine compartment Radiator hoses Plastic manifold bolted to side of engine which is known to leak (have replaced on an '01 VW Beetle, and an '02 Jetta, both members of our family in the past few years.). Overflow reservoir cracked Radiator leak.
Reply back what you find. If the engine got too hot, you may need to have the thermostat replaced.
Guys, what you are experiencing is the car built warning system. When your engine light blinks it indicates a Major Problem has occurred or is occurring in the engine. When this occurs the cars goes into a "safe," mode which means all power is cut by at least half in an effort to save the car from more major damage. You can take your VW to any large chain autoparts store (autozone, advance, etc) a lot of them are offering a free engine diagnosis. Do this if possible to see where the problems maybe coming from and ways to fix them.