2002 Ranger 2.3L coolant temp gage not working
The temperature gage on the dash does not move at all. I have already replaced the two wire temp sending unit between the back of the head and the firewall. Nothing changed. I jump the two wires on the connector and the gage swings all the way to hot so the gage seems to be working and i have power in the wires. Haynes manual says the 2002 2.3L has two coolant temp sensors. The two wire sensor is for the computer (which is used to set the mixture) and the one wire sensor is for the gage. PROBLEM: using inspection mirror, flashlights and a lot of time, I can't locate the one wire sensor any where. (it's supposed to be right below the two wire sensor) second issue is: if in fact there is a second sensor why did the gage swing full range when i jumped the two wires.
Possibly an unrelated issue: car misses/skips sometimes. throwing two codes: P0125 and P0301.
P.S. I also just replaced the thermostat (whose plastic ears holding the sheet metal lip was broken)
Can't figure out what to try next? any ideas? thanks