roffey

When tyres are replaced, the aluminium valve stem on the pressure transmitter should also be replaced. These stems can corrode and break, particularly if the steel cap cover is on them. Happened on my new 2009 C5 tourer. Not very useful when all you want to do is pump the tyre up. Best to fit a plastic cap. In my case I had them removed and disabled in the software, after they crumbled on two of my wheels at the same time! I was informed by the MOT guys that it would not pass if warning lights appeared.

Well, after a sequence of events, the autobox is back to normal, changing gears as it should, regardless of the degree of acceleration. The sequence? well, here goes. 1 When it's time to put the clocks back, put the time 1 hour forward instead. ( if not, wait a year ) 2 Borrow an air pump from a friend. Repair it by pulling the lever head apart. Use a drawing pin, after putting it in a drill and using a power file to reduce the head diameter to 7.7mm, and then crimping a 10mm length of 316 stainless steel thin walled (2.35mm dia) tube to it's spike. This replaces the missing tyre valve release pin and allows correct air pump operation in order to get the rear offside tyre up to the correct pressure. 3 Observe dripping condensate water from the air conditioning unit releasing from the front offside front wheel trim area. After this has occurred, turn the a/c to the off position. 4 wait until it's time to leave work, and then do so. 5 Travel in an orderly driving style for 2 miles, then adjust the clock time 2 hrs back. (This will synchronise the cars time to the rest of the UK). 6 Wait until it's safe to accelerate at an increased rate ( ie motorway) and the gearbox correct behaviour memory will have been restored. For some, a different sequence of events might be necessary, ie (in a different order), but this worked for me. As ever, happy to help when I can! :)

Yes, I suffered that early on from new, and they changed it as a service update. What puzzles me is the dynamics of the characteristics. Maybe it has learnt and decided that I don't really want to change gear anyway!

Recently the auto, although functioning correctly at lower rpm and smooth driving, will stay in gear from 4th onwards when accelerating more heavily. If I use the stick change to 5th, then back to auto, it will remain in 5th no matter what. Have to use stick to get to 6th. It seems if the rpm drops to below 2000rpm then up again, it will go through all gears. Slow driving again it reverts to normal. Is there a sensor somewhere which controls this? Software glitch? A simple diagnostic gadget is not registering any fault code.( It did show up injector probs when they occurred). Any help appreciated.