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Hi guys sorry for this post but end of the day it is a forum which problems get solved lol anyways i got this problem which my Diagnosis light is on when it reaches 90 degree and then goes of when its gets cooler and i sometimes get a white smoke out of the exhaust don't know why but apart from that the car runs fantastic just been down London to see my mate and get back on the same day and I've done £60 at 430miles so that 33.4mpg thats not bad at all i say.

Have a read of this page.
http://wiki.answers.com/Q/What_can_caus ... he_exhaust

You mean the engine management light is on? 90 degrees isn't hot but maybe the sender's up the creek. Is it loosing antifreeze???

No its fine now guys no more smoke dono what it was? But am glad its sorted i hope lol but yeah my engine management light is on most the time if am stuck in traffic or at 85/90 degrees ?

Maybe condensation?
Unlikely coincidence that your temp gauge is duff and your engine is overheating at the same time but I've no idea what to suggest. Maybe some diagnostics? Any of you hungover ones out there got any ideas?

Thanks steve for your support cheers mate.

teamster1975 wrote:Have a read of this page.
http://wiki.answers.com/Q/What_can_caus ... he_exhaust

Have a good read of the 2nd answer 3:

Someone stating the obvious :!: wrote:Next is automatic transmission fluid which is normally found on automatic transmissions

Well that would figure