Calling all Mechanics

[TimBuck2]

Here's one that has the local dealership baffled. 98 Dodge Ram gives a Throttle Position Sensor Error when switching the vent control to any position from OFF. The vehicle runs terrible until the error is cleared and the vent control is OFF, then it runs fine. The TPS checks out good. Any ideas??

[Scott K]

I would find out what part of the heater control is causing it. Disconnect the blower motor, see if it still happens, disconnect the a/c pressure switch to dissable the a/c compressor. If you need to , remove the heater selector switch and start removing one wire at a time to find out witch circuit is causing the tp to read wrong. Also why is the tp failing , under voltage, over voltage?, when you have the selector on, what is the tp doing different?

[Jeremy airjer W]

Sounds like a fun one to get hands on with!!!

Usually stuff like this gets over analyzed and a simple solution is right under there nose. There is a bunch of information that is needed that you will not be able to provide as 4 mentioned, which will make it really tough to come up with a resolution for you.

My suggestion, trade it in!