FLD 120 ambient air pressure sensor. solved.

Apologize if I duplicate something.
First I thank all of you with your advice. 99 Freightliner FLD 120, N14
My problem was CEL would give me a problem code 222. I bought the sensor but could not find where it was on the truck.
For a few months when ever I got a sensor code I would fill my radiator to the max. Disconnect and reconnect the sensors I could see. This would clear the code and CEL.
During the last couple weeks I noticed I would get this code when the truck was cold and it was humid or morning dew present. I would start truck let it warm up or drive for 30 minutes and the CEL would turn off.

Last week sitting in San Antonio. Drive to there from my loading (1200) miles. I had no issues the truck ran fine. Parked Friday afternoon oversize curfew.
Saturday afternoon started truck. CEL came on. I let truck run to charge batteries, shut off, checked code it was 123.

Sunday morning rained pretty hard, couple inches fell. About noon I started truck CEL came on, then the red SEL came on steady, flashed a few times and the motor turned off. I haven't had that happen. Started motor a handful of times hoping to dry the system. Checked code 352.

I called Freightliner dealer the advice given, unplug the sensors one at a time. When the code changes that sensor is the trouble. He said the bad sensor is overwhelming the ECM with a bad signal that it can't determine which one is bad.

I had a new ambient air sensor with me. I have been trying to find the bad one for a couple months. I don't like to mess with my truck away from home.
Well I opened hood and looked where the water was inside the engine compartment.
Most the wire bundles between the ECM and the firewall were wet.

I took the connections off the ECM. I found the Ambient air Sensor bolted to the block behind all those wires. I was unable to see it before. I changed the sensor. I also took the Data link connection apart. cleaned all these connections. Put them all back the way they were.

Truck started and ran with no codes. I have driven it a week with no problems.

Someone posted a schematic of the sensor circuit. Thanks.
Once again want to thank those of you who gave advice and put this here, it may help others in the future.