Coolant temperature sensor

ollydj

Member
Ive recentley had suspision that my cars running a little rich.
Ive gone through all the usual things ie
tested and cleaned injectors
run diagnostics check with live readings
swapped maf sensor etc etc
tonite i thought id check the resistance on the the coolant temp sensor.On cold i was getting 4000ohms, i then took the car for a drive and got it up to full working temp, i rechecked and found that it had dropped to 270ohms. Are these figures normal? or shold there be zero resistance when up to full working temp?

i Priced a temp sensor up from nissan today and it came in at 45ish plus vat so i dont really wanna have to buy one knowing that it may not fix it.
 

gtiroz

Administrator
Staff member
EF&EC-630 states:

20º = 2100-2900ohms
50º = 680-1000ohms
80º = 300-330ohms
 
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