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davegm
15-12-2007, 06:40 PM
My son's P reg A4 fires for a few seconds then cuts out.
The fault code says week signal from key.
We have tried both keys to no avail. Both keys have been used in the car recently.

Crasher
15-12-2007, 08:18 PM
Normally this is due to the reader coil around the ignition barrel going faulty, it is a common problem.

davegm
18-12-2007, 08:09 PM
Normally this is due to the reader coil around the ignition barrel going faulty, it is a common problem.
Thanks for the reply.
We have got the lock barrel off with the reader coil and if I have read the meter right it shows about 21 ohms.
I can't see any fraying of the wire and the connector seems o.k.

Whats the procedeure if we have to have a new barrel and or coil.
Does this mean new keys and having them plus the immobiliser programmed.

Regards

Davegm

Crasher
18-12-2007, 10:42 PM
You have to replace the ignition barrel as the reader coil is built in to the barrel. To maintain the original key, the barrel has to be specially ordered and can take six weeks. If you use a new barrel with a new key, you have to have the transponder chip of the new keys programed into the immobiliser unit. I would need you to PM me the chassis number and post the full fault code report to be of more help to you.