23.8k. Name: James. Ford Model: Sea Grey Mondeo MKIV 1.8TDCi 140ps Zetec. Ford Year: 2007. UK/Ireland Location: Kent. Posted January 13, 2014. Not every nook and cranny has a sensor you see, so what happens is one part suffers with no sensor. The next sensor in the sequence expects the number 1 or 2.