Will do Andy - however just popped to the shop (2 minutes) and parked up and ran the OBD data stream again ( well twice as i have 2 code readers for comparison purposes) and the IAT was showing 39 C - then with 2nd reader a minute or 2 later 42 C - its a cold day and the ambient temp is 7 C - so that does not sound right does it ? 
And looking at the symptoms of a failing IAT sensor misfiring features.
Will investigate further tomorrow.
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She came off the Longbridge Line on 20-05-2003
The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.
Last edited by Yorkshire GOC; 17th January 2021 at 14:05..
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