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Anonymous
the computer should reset itself after you reinstall a battery. :D
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You normally do not have to reprogram the key when you replace the battery. If you do you will have to contact your VW dealer.
According to what I have been told, the dealer must reprogram it.
The ECU takes time to re-calibrate after changing batteries. After installing the battery try to avoid driving it straight away, just leave the car turned on on idle for about 10 - 15 mins for the ECU to reprogram itself (fuel / air mixtures etc)
Voltage regulator or loose wire.
At the battery.
Not any more than your home computer would if you unplugged it. You will need to reprogram your radio stations again though.
its a good idea to disconect the negative battery turminal ANYTIME you work with something electrical. :D
Unhook the battery, overnight, and in the morning, rehook it. Make sure poles are clean.
That requires the dealers scan tool.
NO. The battery light as you call it is actually the charging system light. If it is staying on the charging system is not working properly. More than likely the alternator has failed. It really has very little to do with the battery.
The 2005 Ford Focus has 16 valves.
battery size for 2005 Hyundai elentra