Ignition fault error code

[reabo]

Hi guys.
I have a 2003 900 div and it has started showing the 9k error code when i try and start it. This goes on for a couple of minutes then it starts fine. It doesn't matter if it is hot or cold. I have swapped the tdi unit for a known good one and no difference. Once it is running there is no problem, it doesn't cut out but a couple of times it has shown the error code whilst riding at motorway speeds but there has been no change in the engine at all.
Anyone know what the self diagnosis checks or has come across this before?

[bluevinny]

My D9 suffered this same problem for a long time - lots of head scratching and wiring loom checks. Eventually resolved the problem by cleaning the neutral switch terminal on the engine with electrical contact cleaner, then applying ACF50 to keep the moisture off. Good luck.

[reabo]

Will be checking that. I am begining to think a dodgy ignition switch as if i turn it off and turn it back on (classic move) it starts.