You have a leak, 0.8 bar system pressure means there's barely any refrigerant left in there.
Note, if your air con engineer extracts a full charge of approx 600 grams, then you have a faulty pressure sensor

Last edited by GodivaNige on Tue Jul 18 2017 5:51pm. Edited 1 time in total

I to have a little problem after sorting out the first one i had but now it seems to take quite a while to get cold i know it works as it seems to take a few mins to get cold but gets there but not as cold as it should be

Probably low refrigerant goeffsnook. You'll need to have your existing charge extracted and weighed to gauge how much has been lost. Full leak test using nitrogen, any leaks repaired then a 20 min vacuum (recommend an hour to be absolutely sure all moisture is removed) followed by a weighed recharge.

Take it to someone you know are fully trained in automotive air con repair and servicing, there's a lot of barely trained ac machine operators about that have been on a 1 hour course who invariably don't do the job properly, resulting in further issues arising in a short space of time.

Thanks again nige, the only issue is that last time i had it checked they took 600 out and put it back in then it worked so a faulty sensor could be on the cards? very much hope so.
I will keep you informed as i have booked in a local specialist who comes recommended but he's busy until the 7th August  RRS Autobiography SDV6 19
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Yep, the only way to be sure if it's the pressure sensor giving you the fault code and thus preventing the air con from working as it 'thinks' there's no refrigerant and thus preventing the compressor working to protect it, is unfortunately, to weigh the extracted gas.
If your guy pulls out a full charge, obviously, don't let him recharge it until you have changed the sensor as you'll have to go through the whole reclaim and recharge procedure again.

Not surprised you have to wait for your repair, the best people in this game are always busy at this time of year

yeah the last bloke i used came out the next day!!! lesson learnt. RRS Autobiography SDV6 19
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Pressure switch/sensor part number should you need it... JTE000010

Hi i am pretty sure it has gas as it is at about 4-5 bar when its off and goes up to anywhere between 7 and 10 bar when running so i think that means it has gas and it does get cold but takes a while

If the charge is correct goeffsnook and the cooling is noticeably slow to come on, you may have a sticking air mix flap or the cabin temperature sensor is not reading correctly. If you have IID you can check these parameters

Thanks Godivanige i go have an iid tool non bluetooth though so any idea where that would be or should i just check the manual

Don't know about non BT IID tools compared to BT IID. I can read cabin temperature in live values with my BT tool. If you can find it, just check it is reading a realistic figure, not lower than expected. The flap positions can also be read but if one were faulty, i'm fairly sure you would see it as a stored fault code as the ECU checks the range of movement of the flaps when you switch on the climate control and a fault is recorded if a flap motor doesn't have that expected range of movement.

I would run some relevant live values using your IID, monitor system pressure and evaporator temperature initially. Start your car and you should see immediate changes to the system pressure (it will rise rapidly), evaporator temperature should fall sharply within a minute or two. Set your cabin temperature to 16 and record what the evaporator temperature drops to after ten minutes of running. If it falls to around 1-2 celsius in a short space of time yet the air coming out of the vents doesn't feel all that cold, then the air mix flap isn't fully diverted to cold and is letting some warm in.

EDITED to add... I had an air mix flap actuator fail on my previous car, a VW Touareg. it got stuck in the cold position so the drivers side of the car in winter was freezing cold. Not funny when trying to see out of a frosty windscreen The whole dash had to come out to change a poxy £60 stepper motor. Germans... not as clever as they make themselves out to be.

Hi just found a few bits it would appear the compressor is pulling 242 a the evaporater goes down to about 3 degrees but seems to go between 3 and 10 while driving the pressure is between 5 bar and about 7-10 when switched on and when i set the temp to 16 i saw it was reading about 18 degrees on internal cabin temp but it may have been a bit higher when i started it earlier my viscous van was staying on and the air con was not cold when i switched it off and restarted the fan stayed off and it goy colder

another thing today messing with the IID tool it seems now to take a while for the evaporator to drop and only drops to about 8 degrees but my inside cabin was 23 degrees when it clearly was not it was a lot cooler than that these cars are weird it seems to do something different every day

I'm sure they just like keeping us on our toes, (women)!!! RRS Autobiography SDV6 19
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BMW f15 X5 m50d SOLD!
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Evoque Dynamic Lux. SOLD!
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Very true