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Old 04-14-2019, 09:10 PM
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Coolant temperature sensor connector

Today I replaced my coolant temperature sensor connector. I was removing my valve cover and it got caught on the plug and ripped the wires out so I solder a new one in.

I am pretty sure that I soldered the correct wires to the correct wires, not sure if that matters.

But now I am still getting a 22 code.

And I had unplugged both leads on the battery for more than an hour and still get a cel.

Can I have damaged the sensor by connecting the wires wrong?

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Old 04-14-2019, 10:00 PM
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Ok, no clue what the resolution here was, the the light went off exactly the next time after posting this thread.

In all, this is what I did with no logic of what happened.

Disconnected the battery ground for 10 minutes
Still cel

Disconnected the battery for 1 hour
Still cel

Ran the jeep for 5 minutes, then disconnected the battery for another hour
Still cel

Disconnected the battery, turned the ignition to start for a 10 count
Still cel

Started the engine wiggled the wires
Still cel

Cursed
Still cel

Ran the engine for 1 minute to turn it around to be under the light more
Still cel

Wrote this thread and posted it, went in and drank water, checked for a response, started Jeep
NO CEL!!

Wtf...

No clue

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Old 04-14-2019, 10:38 PM   #3
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Damn Electrical Gremlins...
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Old 04-15-2019, 07:54 AM   #4
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I can't say with 100% certainty, but on some PCM sys the controller needs to see three "drive cycles", without failure, in order to clear the code without the use of a scan tool. That appears to be what happened.
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Old 04-15-2019, 08:43 AM
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I will pay attention, because it came back on this morning.

Edit: Drove 6 miles to work at 60 mph with the CEL lit. Shut it off and opened the hood. The engine is cold. I noticed the the plug was not completely seated, which I double checked several times yesterday as I went along. Maybe the aftermarket plug does not fit as tight?

I am not going to try and rectify it at this point, I reseated it and will see if it unseats again.
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Old 04-15-2019, 09:52 AM   #6
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I’m curious the factory wires were installed in the connector via a wedge, you broke the wires them selves or just pulled the pins out of the wedge?
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Old 04-15-2019, 09:59 AM
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1 wire goes in and out the other side pretty easily and the other won’t click in. It looks like the connector had issues before, so I decided to just replace it. The pins came out.
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Old 04-15-2019, 11:17 AM   #8
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I replaced my sensor recently as well... while I was pulling the plug the plastic white clips on the top snapped, I partially dislodged the wedge, but I was able to reinsert it, after I covered the top (where the clips were) with liquid electrical tape.
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Old 04-15-2019, 12:33 PM
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There is no wedge or plastic clips, so maybe that was a 95 thing?
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Old 04-15-2019, 05:34 PM   #10
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Did you use Teflon tape on the threads? If the PCM temp sensor is anything like my gauge sensor, it requires the sensor housing to ground to the manifold.
The Teflon tape interferes with the grounding.

Good Luck, L.M.
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Old 04-15-2019, 05:45 PM   #11
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Mopar adds it to the OEM sensors, I can’t see that would be the issue.

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Old 04-15-2019, 06:33 PM
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I never replaced or removed the sensor.

I came out of work, started the Jeep and the light came on instantly. I left it running and got out and pressed the plug in a bit, paying attention not to touch the wires at all. I want to see if it is the plug, or my solder and shrink tube. The light was still on when I got back in. I shut it off, and restarted it and the light remained off.

I will see if I can shrink tube the connectors together, starting at both end and shrinking toward the middle may pull them together.
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Old 04-15-2019, 07:07 PM
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I may slightly bend the tangs in the sensor opposing ways to bind the plug

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