Is there more than one temp sensor on a 1993 240? I have an erratic guage in the dash and a hard and rough running engine (until it runs for a few minutes) when it is cold. I think I need a new temp sensor, but want to replace the correct one for the hard starting problem.Are the guage problem and the hard cold starting the same problem, or at least related?

Jim

 

Yes there is 2 of them.
The guage one is a single wire.