SOURCE: 2005 VW passat 1.9 TDi "immobiliser activated" on display
There may not be any other way to fix it except to replace your instrument panel. That's where your immobilizer is located. Or you could try this:
Try cold-booting the car. Remove both battery cables from the battery.
Short the battery cables together (away from the battery) for about 15
seconds. Reconnect the battery. No guarantees - I found this info at tdiclub.com.
SOURCE: vw passat 2006 repair manual
try here first
http://www.pdf-word.net/automotive-guide-volkswagen/volkswagen-passat-technical-bulletin.html
your local library than your auto parts store or book store
SOURCE: Reset service interval alarm on VW Passat-01?
This is a mileage interval light that trips every 3,000 to 5,000 miles that indicates an oil change is necessary. You do not need a special tool to change your oil, nor do you need to bring the car in to the dealer.
1. Sit in the driver's seat of the Passat and close all the doors.
2. Position the trip/odometer button to display the odometer mileage reading, then hold it down with the forefinger on your left hand.
3. Turn the ignition key to the "key-on/engine-off" position to turn on all the power options for the Passat without actually starting the engine. At this point, a service indicator light will display (in the form of a wrench).
4. Press the minute adjustment button on the clock (or turn the knob clockwise on European manufactured Passats) and release the trip/odometer button.
Good luck and thank you using Fixya
Testimonial: "Thanks! Maybe the issue is that I didn´t close the doors. I´ll try that!"
SOURCE: my 2000 vw passat 1.9 TDI manual grinding gears
as 2nd/3rd are the most used gears chances are the syncromesh on both these gears has gone,you need to strip g/box completly/or buy a recon box.
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