I think I have a cooling problem with my 2003 Focus 2.0 Ghia Estate. Using this test menu on my car there are 2 temperature parameters. The first one is in the format XXXXC and the second one is XXXX.C.
The first one is as low as -4C when the engine is cold and raises up to about 85C, at which point i bottle it and turn off engine as it seems much hotter than this and the other week had steam coming from under the bonnet! In normal free-flowing driving it varies from 65-81C. This doesn't seem right. The gauge will register halfway when the temp reaches 80, but below this moves down to below a quarter as the temp falls down to 65C. When the the steam was escaping the guage was normal with no fan cutting in. If on tickover the temp will keep rising to 80ish (then I turn off), but will fall if A/C is turned on.
The second temp seems higher - 20.C when cold and rises to 99.C, however the number is sometime not displayed correctly for example it may go 073.C then 07C.C etc. Also when it goes above 99.C it change to letter such as A0A7.C. If this should be 101.C for example and I wonder if that is why the fans will not cut in.
Can anyone offer any insight into what the two temps refer to and why the second one is not always displayed numerically and whether this might be what is affecting the guage and the lack of cooling fans. Both these guages track each other, when the first one goes above 80C the second one passes 99.C and change to numbers, if the first one cools to the 60s then the second one cool to the 80s. they also both seem to be able to drop by 15/20 degree in only a few seconds - this seem unlikley to me.