Renault Trafic non starter

[Rockettvr]

Evening all
I'm hoping you can help with my Renault Trafic (10 plate) problem
I picked up the van recently and it had been stood for about 6 months totally unused. I've had it for a couple of months but not been using it (I need it for a trip to Ireland in a couple of months) - just start it up once a week or so and trundle up and down the drive to keep everything freed off. Started it the other day and the glow plug light ,the service light and the engine management light all stayed on. tried turning ignition on and off a few times to see if it would clear but no go but van still started but wouldn't rev very high then died totally when I released the throttle. Now it wont start at all - turns over fine, it sort of tries to start but doesn't quite catch.
Plugged in my cheapo OBD reader and it shows the following fault codes

P0100 Mass or volume air flow circuit A
P0120 Throttle/pedal position sensor/switch A circuit
P02100Throttle actuator control motor circuit range/performance

Could one of you learned chaps point me in the right direction as to the faulty part &/or a fix . I'm guessing mass airflow meter or similar ??
Do you think it is linked to the lack of use over the last 6-7 months??

Thanks in advance for any help
Ron

[E-bmw]

My guess is that it could be the :-

Mass or volume air flow circuit A
Throttle/pedal position sensor/switch A circuit
Throttle actuator control motor circuit range/performance

[E-bmw]

Joking aside, did you get the codes reset?

Try disconnecting them all, cleaning/checking all connections (inc. earths) and try again.

[GreenV8S]

I don't know what the throttle actuator is, but those codes all seem to point to a discrepancy between the throttle position and the amount of air the engine is getting. Any possibility of air filter blockage? Do you know what sort of mass air flow sensor is used? If it's a flap/vane, it might be stuck. If it's a hotwire, it might be contaminated or have a heater fault. Is whatever mechanism the throttle actuator uses free to move? Given that these things are all (obviously) electrical, it would be with giving the fuse box a sanity check in case something is loose/blown.

[Rockettvr]

Had 5 mins spare tonight thought id check a few connections etc - thought id drop off the maf while in there and I'm pretty sure this isn't helping -
My very own fungus farm on the air filter which is wet through - wondering if its killed the maf which sits right next to it - need to find some instructions on testing it

[GreenV8S]

A soaking wet air filter is probably going to be very restrictive so that might be what's causing those codes. Have you tried firing it up with the filter removed? It does make you wonder what else has got damp and may not be working properly as a result. Any idea how all that water got to the filter? It may be a clue that there is a blocked drain in the filter box.

[Rockettvr]

Just bringing this up to date
I've replaced the afm and air filter , reset the fault codes and all is well
Seems that rain water is running down the screen and dripping down onto the air cleaner box and slowly seeping into the box and soaking the air filter. I assume that under normal use the airflow through the filter etc would help dry it out but 8 months or so of inactivity has meant the water just sits there and has affected the afm.
Who would have guessed that a faulty afm would bring up so many warning lights and fault codes!