Disconnected sensor, faulty sensor, faulty PCM. As far as the physical aspect of engine temperature, this should have little effect. High voltage translates to -40 engine temp, that is what the PCM sees. If it sees the air temperature is higher, than it knows there may be a fault. If anything, you would have a rich run condition, perhaps some higher idle.
Monday, May 17th, 2010 AT 11:29 PM