iandsm
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This might interest some people with Sevel based vans, Boxer/Ducato etc. since last winter the bag of spanners rattle engine sound has been worse than ever and I have noticed that the engine gives a little rattle when speed increases just before a gear change up. Lastcweekcicnorices that the ATS (?Ambient temperature sensor) on the bottom of the offside mirror was giving a false reading. The real temperature was 2 1 but the dash indicator was showing 8. I checked several times and got various readings 1,4, 12 etc so i thought that might need attention. My garage advised me against an eBay’s special at £10 as being unreliable so I purchased a genuine one from a main dealer £80. The sensor has been fitted and now the temperature read correct. Wow, what a difference. The engine is much quieter with only slight rattle from cold which stops after a few minutes and going through the gears, even reving up to and over 3000rpm no rattle at all. Garage man says it’s essential that the ATS works properly as it connects to several engine items controlled by the engine software and these settings, if incorrect, can cause all sorts of issues, not least a blocked DPF. So if you have such a sensor on you mirror which gives an incorrect dash reading you might think about getting it sorted.