Have you installed it yet? Did the code ever pop up again before you replaced it?

My 4.8iS just threw the code p0128 today but looking at the hidden menu on the cluster it was running 88-90*C and this was at stop and go traffic for about 30 min. Otherwise even after some hard pulls it remained constant +/- 5*C guess it was a soft fail or whatever.

So now just preparing myself for a new T-stat and thinking of doing the 90*C version.

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2005 Imola 4.8iS