2002 Audi TT Immobilizer & instrument panel - PLEASE HELP

Jonathan River

Asked by Dec 08, 2013 at 09:19 PM about the 2002 Audi TT Roadster

Question type: Maintenance & Repair

I recently bought a 2002 audi tt from a used car dealer, and had a few issues with the
fuel gauge. After taking it in, they replaced the instrument panel to try and fix the
problem, as well as the fuel gauge sensor. Everything went well for awhile, but after a
little while, the RPM meter would fluctuate rapidly or quit working randomly while
driving. Then, the oil light sensor came on and told me to check my oil levels. However,
my oil levels were fine every time that this happened. Recently I was driving down the
highway, and both things started to happen again. I tried to ignore it, but eventually the
whole instrument panel malfunctioned. The RPMs and Speedometer shot all the way
up, the middle panel went completely red, and I had to pull over and stop. Again, I
checked my oil levels and they were fine (I had just had an oil change). So, I tried to
start my car again. However, the immobilizer light came on saying I was using a
duplicate key and my car wouldn't start. This is the only key that I have to the car. We
tried to reprogram the key, but this didn't work. Does anyone know what may be the
problem? We're trying to replace the instrument panel AGAIN and the mechanic said it
could be the wiring harness. Is this accurate?

6 Answers

it is the MAIN ground connection to the chassis ground....the battery cable BLACK...the lug end what attaches to the chassis...wirebrush this one removing all corrosion from the lug and the frame there where it attaches...get a NEW battery and it will all come back to normal~

1 out of 1 people think this is helpful.

the Relay panel and Fuse box needs to see 12.5 volts with at least twenty CLEAN amps to work with...a NEW battery will give it this....as the tin/antimony alloy batteries do not last like LEAD ones do...they will stop accepting a charge ten percent per year...five years old is a grampa~

a cheapo scanner can read the RESET CODES~

2 out of 2 people think this is helpful.

no news is good news?~

Jonathan River

I haven't heard anything back from the mechanic, but you're saying I need to just brush the battery cable where it connects to the chassis, and get a new battery? What will the reset codes help me with?


If the battery cable is not the issue, and it is internal with the instrument panel, they can be repaired by companies that specialize in such repairs. There is one on Ebay in Massechuesetts. Cost $200-$300. You send them your instrument panel, they fix it and send it back. The instrument panel is easy to remove and re-install.

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