We changed the sensor and still get the same reading. car was involved in front end collision. not the sensor, already ruled that out. outside temp is really like 80deg and the ac won't work if the car thinks it's freezing outside
If you replaced the right sensor, there must be a problem in the wiring to the computer.
You did reset the computer - hit ac and recirculate buttons at the same time ??
SOURCE: 2001 Tahoe LT 5.3.
There's a feed from the engine coolant temperature sensor into the AC controller as if the controller thinks the engine is overheating it'll shut down the AC to reduce the load on the cooling system
Try unplugging the cooling sensor on the engine ( follow the radiator top hose back to the engine as the sensor is close to this) and see if this replicates the problem, if it does then you know thats the issue.so the coolant temperature sensor needs to be replaced.
--------------
Also the possibility is faulty evaporator temp sensor.It may be sending a false signal to the climate control module that the evap is around freezing temperature thus shutting down the compressor. The evaporator temp sensor is located on the evaporator housing, in the a/c system, and monitors the temp to prevent the evaporator from freezing up. If the AC control module sees the temp going too low, it will send a communication message to the pcm to turn off the a/c compressor until the evap temp returns to an acceptable range. The other possibility is the high pressure switch located on the line in the right hand side whell arch.
Why I mentioned the high pressure switch because as the temp increases the pressure in the system increases and if the ECU sees this signal from that pressure switch in the wheel well on the a/c line it will shut down the compressor. You can test this with a digital voltmeter or install a set of gauges to the high and low side service ports and see where the pressure go. It also may be the temp sensor element on the compressor itself.
-----------
This should help.Thanks.Helpmech.
SOURCE: Temp Sensor
The temp sensor known as the engine coolant temp. sensor tells the computer if the engine is overheating and so forth and tells the injectors how much fuel to give the engine. The temp. sending unit is what controls what your guage reads. It sounds like you need the temp. sending unit. It located near the thermostat housing with a single pole connector.
SOURCE: temperature control sensor?
Sounds like a loose connection -38 is probably the open circuit position. Not sure where the sensor would be though.
SOURCE: "2003 Chevy Impala won't start". Car would not
The alternator is not charging,or the battery wont take a charge.If all accessories work fine when its running after you've boosted it,its likely the battery.
John
9,444 views
Usually answered in minutes!
×