troyhatt Posted May 10, 2022 Report Share Posted May 10, 2022 2009 dodge journey RT. Engine sometimes overheats. Cooling fan only works on low speed, even if its running hot with the AC on. If i unplug the coolant temp sensor then the fan will run in high speed only. Could the temp sensor be bad? Thanks for any help. Quote Link to comment Share on other sites More sharing options...
2late4u Posted May 10, 2022 Report Share Posted May 10, 2022 which eng would help Quote Link to comment Share on other sites More sharing options...
troyhatt Posted May 10, 2022 Author Report Share Posted May 10, 2022 3.5 L V6 Quote Link to comment Share on other sites More sharing options...
John/Horace Posted May 11, 2022 Report Share Posted May 11, 2022 RTD probes run by ohms resistance. Measure old one and compare to reading of a new one. If very close then problem is probably in wire harness. Quote Link to comment Share on other sites More sharing options...
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