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Discussion Starter #1 (Edited)
Help needed with my 2004 807:

Airbag light on, so not MOT approved. Plugged in my Launch codereader and got the following messages:

1. C01 - Driver's module trigger. Open circuit.
DTC status: Coherence fault. Distant

2. P081C (This might not be relevant here)

And when diagnosing I got a message on the cars displaying: "The passengers airbag not activated". It is not showing up a light on the car showing that is not activated unless I use the key to deactivate it. So this only come up when diagnosing the airbag system.

What could be done to eliminating or finding the fault?
 

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I'd check if the footwell carpets are wet, particularly the area just to the right of the driver's feet. There's a drainpipe running inside the console there that gets clogged up and floods.
 

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+ 1 on confirming no water ingress, think you need Planet (or a better reader) as the codes obtained don't make much sense
 

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Discussion Starter #5
Thanks :)

Yes the fotwell is wet.
Frodef is the drainpipe comming from the heaterconsoll in the middle? Could the ECU between the seats be damaged? (I have a second hand one, so can change it.)
 

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Yes, take the side panel off the center console, and there's a rubber pipe going from up above and through the flooring. It pulls out at the floor level, and that's a typical leaking point. Have something ready to collect water when you disconnect it.

The wiring loom can be damaged, but I suppose the ECU inbetween the seats is the prime suspect. I had to get mine replaced a couple of years ago, they sealed up the ECU box with silicone.
 
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