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Old 10-18-2012, 09:30 AM
onlyonechop onlyonechop is offline
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Location: Atlanta
Join Date: Oct 2010
Posts: 2
Mein Auto: 2006 530xi sport wagon
Valvetronic power supply undervoltage

I have a 2006 530xi Wagon with 105k miles on it. I keep getting the following error code: 2A3F Valvetronic, servo motor : power supply.

I checked the continuity between the connector at the VVT servo motor and the computer, and it was fine. I deleted the error two days ago then checked and cleaned the connections to the VVT servo motor and the eccentric shaft sensor. I also swapped out the VVT relay with the DME relay (they are the same part). I checked the codes again and the same error was back and apparently it had occurred 22 times in the last two days.

This makes me think that the valvetronic system isn't working at all, which might explain why my gas mileage is so bad. Does anyone have any ideas? I'm thinking it might be the VVT motor, but I don't want to start throwing new parts and $ at the problem and hope something works.

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