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How to reset ambient air temperature sensor - 1995 Chevrolet Corvette

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6ya6ya
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Posted on Jan 02, 2017

  • 5370 Answers

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.

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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.

Posted on May 29, 2011

  • 6468 Answers

SOURCE: location of the ambient air temperature sensor on an 05 trailblazer

behind the grill for the on on the mirror on the air filter asem for the engine

Posted on May 09, 2012

emissionwiz
  • 75066 Answers

SOURCE: chev venture ambient air temperature sensor

Yes it could be the sensor is cheap and it is located in front of the AC condensor core which is front of the radiator..

Posted on Aug 23, 2012

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1 Answer

My outside air temp is reading at -40 on my 2008 Pontiac Torrent. What is the right sensor and where is it located?


Ambient Air Temperature Sensor (UH9)
At the front of the vehicle, at the lower left side of the front bumper bar
Ambient Air Temperature Sensor (UH9)
Pin
Wire
Circuit
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A
0.35 L-GN/BK
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Ambient Air Temperature Sensor Signal
B
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Jul 22, 2015 | 2008 Pontiac Torrent

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What does code P0072 mean for a 2011 Chevy Equinox


P0072 - Ambient Air Temperature Sensor Circuit Low Input

- Faulty ambient air temperature sensor
- Ambient air temperature sensor harness is open or shorted
- Ambient air temperature sensor circuit poor electrical connection

Mar 11, 2015 | 2011 Chevrolet Equinox

1 Answer

DTC code p0071 what is this and how to repair


- Faulty ambient air temperature sensor
- Ambient air temperature sensor harness is open or shorted
- Ambient air temperature sensor circuit poor electrical connection

Jan 30, 2015 | Cars & Trucks

1 Answer

2002 toyota avalon engine check light on P0078 and P007C


P0050 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 1)

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P0057 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 2)

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Correlation

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P0082 Intake Valve Control Solenoid Circuit Low (Bank 2)

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Mar 22, 2013 | 2002 Toyota Avalon

2 Answers

What do the codes p0072 and p0073 mean on my 2008 Dodge avenger? w


Well, I would say that it means that SOMEBODY is confused!

Diagnostic Test Code (DTC) P0072 is defined by SAE J2012 as "Ambient Air Temperature Sensor Circuit Low" DTC P0073 is defined as "Ambient Air Temperature Sensor Circuit High"

I do not know how the ambient air temperature sensor circuit could be faulted both HIGH and LOW at the same time.

The only thing I have ever seen cause something like this is when people try to install aftermarket "performance chips" on their vehicles which "lie" to the computer about what the ambient air temperature is.

Apr 23, 2012 | 2008 Dodge Avenger

1 Answer

Check engine light on its the air ambient temperature sensor


Ambient air temperature sensor, monitors the temperature around the radiator even when vehicle is off. Uses this information to determine whether the cooling fan needs to run after vehicle is shut off. When sensor is defective, can cause fan to run until battery dies if vehicle is off or may not activate at all, creating an overheat condition.

Sep 06, 2011 | 2005 Dodge Stratus

1 Answer

How do I reset the outside temperture gauge


you can't reset it. Try replacing the sensor.

SECTION 412-04: Control Components 2002 Explorer/Mountaineer Workshop Manual
REMOVAL AND INSTALLATION Ambient Air Temperature Sensor Removal and Installation
  1. Remove the radiator grille. For additional information, refer to Section 501-08 .
  1. Remove the three upper pin-type retainers in the radiator air deflector.
  1. Position forward the air deflector.
  1. Remove the ambient air temperature sensor.
    1. Detach the pin-type retainer.
    1. Disconnect the electrical connector.
    • Remove the ambient air temperature sensor.
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Nov 23, 2009 | 2002 Mercury Mountaineer

1 Answer

04 Tahoe AC blows hot air on drivers side but resets if restarted


A educated guess I would have to say there is a problem with HVAC control module ! electronics you know ! But that's not the way to do things ! There could be codes stored in the module. The Chevy dealer my have a reflash bulletin for this problem . Then can reflash , reprogram the control module ! The first place to start is checking for codes in the HVAC module.
The HVAC control module is a class 2 device that interfaces between the operator and the HVAC system to maintain air temperature and distribution settings. The battery positive voltage circuit provides power that the control module uses for keep alive memory (KAM). If the battery positive voltage circuit loses power, all HVAC DTCs and settings will be erased from KAM. The body control module (BCM), which is the vehicle mode master, provides a device on signal.
Air Temperature Sensors The air temperature sensors are a 2-wire negative temperature co-efficient thermistor. The vehicle uses the following air temperature sensors:
?€¢
Ambient Air Temperature Sensor

?€¢
Inside Air Temperature Sensor Assembly

?€¢
Inside Air Temperature Sensor Assembly-Auxiliary

?€¢
Upper Left Air Temperature Sensor

?€¢
Upper Right Air Temperature Sensor

?€¢
Lower Left Air Temperature Sensor

?€¢
Lower Right Air Temperature Sensor

?€¢
Upper Air Temperature Sensor-Auxiliary

?€¢
Lower Air Temperature Sensor-Auxiliary
A signal and low reference circuit enables the sensor to operate. As the air temperature surrounding the sensor increases, the sensor resistance decreases. The sensor signal voltage decreases as the resistance decreases. The sensor operates within a temperature range between -40?° to +101?°C (-40?° to +215?°F). The sensor signal varies between 0-5 volts.
The input of the duct air temperature sensors are different from the ambient and inside air temperature sensors. The HVAC control module converts the signal to a range between 0-255 counts. As the air temperature increases the count value will decrease.
If the HVAC control module or auxiliary HVAC control module detects a malfunctioning sensor, then the control module software will use a defaulted air temperature value. The default value for the ambient and inside air temperature sensors will be displayed on the scan tool. The default value for the duct air temperature sensors will not be displayed on the scan tool. The scan tool parameter for the duct air temperature sensors are the actual state of the signal circuit. The default action ensures that the HVAC system can adjust the inside air temperature near the desired temperature until the condition is corrected.
The ambient air temperature sensor mounts underhood and can be affected by city traffic, by idling, and by restarting a hot engine. Therefore, the HVAC control module filters the value of the ambient air temperature sensor for temperature display. The ambient air temperature value is updated under the following conditions: Or you can just buy a new control module an hope that it fixes it. $89.00 at www.partsgeek.com

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Sep 18, 2009 | 2005 Chevrolet Silverado

2 Answers

Climate control air conditioner stops working due to incorrect ambient air temperature


Same car, same problem. Press MODE, FRONT and REAR buttons together to reset tempreture. You probably need to replace the sensor GM part number 15047946 it is in the front grill email me for a picture. chris.abbott@gmx.com

May 21, 2009 | 2002 GMC Envoy

3 Answers

Outside temperature reads 50 at all times


if your outside temp is wrong on your 2002 Envoy here is how you fix it. part number 15047946 sensor. looks like the wrong part..it's not. take the brace part off of it by pressing the clips and slide out the part you need. Loosen the 4-5 bolts from the top of the grill..attached to brace right on top of the grill..just pull the grill out about 3 inches..put your hand thru..it's driver side to the middle. original is grey box with connector. pull it out, reattach connector to new part and push the new piece in the hole..get the piece from the dealer..25.00...put screws back in grill brace. reset the temp by pressing front defrost, rear defrost and mode all at once. took me 15 minutes..and I'm a 55 year old girl:) you can do it!

Dec 30, 2008 | 2002 GMC Envoy

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