johnson 2002 70 hp 4 stroke Model J70PL4SN

by Pete
(Middle River, MD)

This engine has run beautifully. I noticed my check engine light on sporadically. I checked for a code and got 1-5. That is for exhaust temp sensor. I removed the sensor and checked resistance. Manual says at 77 degrees F. should be 1.8 to 2.3 K ohms. I got 1.9 so that seems right. If I heat the sensor the ohms drop. Again this is what they say is correct. I'm just about ready to simply ignore it as the engine runs like a top. It has never dropped into limp mode and it does not seem hot. Any thoughts? I really appreciate your help.

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