Working on a 04 IC RE DT466 engine school bus. Temp gauge is showing overheat condition then it will go back down to normal after a few seconds. Buzzer comes on when hot and then goes off when temp gauge goes back down to normal. Mainly happens when bus is sitting at idle but not always. Plugged in scanner and temp will get up to 225 on scanner and will freeze there, even though gauge on console will go back down to normal after a few seconds. Guage will continue to fluctuate between hot and normal when driven. Two codes came up with scanner PID110 FMI0 and PID110FMI7. Can the sensor on this be the culprit? Thanks in advance.
Coolant Temp Gauge readings wacky
Posted - 12/22/2022 : 12:43:35 PM
