Just got my rebuilt 22re running last weekend and so far it's been great except for a CEL. I jumped the connector to check the code and it gave me four flashes. Looking it up on 4crawler's site it says "Open or shorted Water Thermo Sensor (THW) circuit". I assumed this meant the smaller temp sensor on the front of the manifold (driver side one as opposed to the larger passenger side one). I replaced the sensor with a new one, but the CEL remains with the same trouble code. Just wanted to make sure that I replaced the correct sensor before I start troubleshooting the wiring. Thanks!

 

Just what year??

Did you replace with a new one??

 

It's an '85, and yes, I replaced it with a new sensor. It's the green, rectangular connector. Seems to run great but I need to hold the gas on first startup for a little bit or it dies.

 

So the ECU is not getting the correct feedback from the sensor .

So the cold start injector does not fire that being the reason it wants to stall at start up.

Once things are warm your good to go.

 

Yeah I figured as much. Must be a loose wire somewhere. You're right, not a huge deal after initial warmup, just a little annoying with the CEL in my face the whole time I'm driving. Thanks for the response.

 

Quire often wires break right at the sensor and you are unable to see because of the plug.