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Old 11-25-2021, 07:44 PM   #11
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The temp sensor for the gauge, is that the bigger one? With an actual plastic plug? On mine it's a yellow plug

The other one right below it is smaller and connects with a single blade terminal
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Old 11-25-2021, 10:24 PM   #12
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The temp sensor for the gauge, is that the bigger one? With an actual plastic plug? On mine it's a yellow plug

The other one right below it is smaller and connects with a single blade terminal
I can never remember.

That picture from the Service Manual shows 2 electrodes plugging into the ECU sensor to measure resistance. Based on that information, my guess is that the single blade terminal goes to the gauge.

But, they are like $6 to $12 each. I replaced both of mine when I had issues.
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Old 11-26-2021, 12:15 AM   #13
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Yup, your right. I tested the sensor and it read .513, and that was after 30 min of driving then idling for 10 min. So I think based off that chart it's definitely running cold.
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Old 11-26-2021, 05:42 AM   #14
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Yup, your right. I tested the sensor and it read .513, and that was after 30 min of driving then idling for 10 min. So I think based off that chart it's definitely running cold.
It's common for thermostats to go out. That's what I'd focus on at this point - getting a new thermostat.

You can get one at the dealership or something like a good AC Delco name brand. I wouldn't waste time with a Duralast part, though.
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Old 11-26-2021, 06:23 AM   #15
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After I swapped my pathfinder engine, I added a real temp gauge. I pulled one of the block drain plugs out and put the temp sensor there.





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Old 11-26-2021, 10:32 PM   #16
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Changed the t-stat, getting warm now.
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Old 11-27-2021, 02:50 AM   #17
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What's warm? I know that 210F is still in the "OK" section of the gauge
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Old 11-27-2021, 05:17 AM   #18
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Not sure of the exact temp but the needle went from maybe 1/8 off of the bottom to about 1/3 of the way up.
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Old 11-27-2021, 06:18 AM   #19
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You may have air in the system. There is a bleeder 10mm bolt on the top of the manifold next to a small yellow warning sticker. Get the truck warm just a little and crack it open, also you may have a clogged radiator or the previous owner took out the thermostat. Changing that thermostat is a BIG pain in the ass. Most people forget about a small 8mm bolt and cannot get the housing out. This engine is going to make or brake you emotionally or financially make no mistake. After dealing with my pathfinder, I'm a VG30 pro!!!
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