Toyota How To Replace Ambient Temperature Sensor
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OEM Temperature Sensor Part #'s:
88790-22131, 077500-5191
Tools Needed:
- Either 10mm racheting wrench or Rachet with stubby 10mm socket
- something extremely flat
This Part also for 2007-2016 Lexus ES350
All vehicles with 1NZ-FE engine:
Toyota Vios/Belta
Toyota Yaris/Echo
Scion xA/ist
Scion xB (1st generation)/Toyota bB (1st generation)
Toyota Raum
Toyota Porte
Toyota Platz
Toyota Ist
Toyota Auris
Toyota Fun Cargo
Toyota Premio
Toyota Allion
Toyota Sienta
Toyota Probox
Toyota Ractis
Toyota Corolla (Axio/Fielder, RunX, Allex)
SYMPTOMS OF FAILING OR BAD AMBIENT TEMP SENSOR:
The AC auto mode will not work
Most modern vehicles have an auto AC setting that will allow the vehicle to automatically set and regulate the temperature. The AC system will simply read the ambient and cabin temperature sensors data and continuously cycle the AC system on and off as required to keep the cabin cool. When the ambient temperature sensor fails, the system does not have a reference point from which to base it’s automatic calculations and the setting will not work.
2. Inconsistent cooling
Another symptom of a bad or failing ambient temperature sensor is inconsistent cooling. As the ambient temperature sensor plays a direct role in the automated function of the AC system, when it is having a problem this may interfere with the system’s ability to cool the vehicle. If the ambient temperature sensor fails or is sending out an inconsistent signal, then the AC system may have trouble maintaining cool and comfortable cabin temperatures.
3. Incorrect reading on temperature gauge
Another more obvious symptom of a bad or failing sensor is an incorrect reading on the vehicle’s temperature gauge. Most vehicles will have some sort of display somewhere on the interior of the vehicle that indicates the outside temperature of the vehicle, usually read by the ambient temperature sensor. If the reading on the gauge or indicator is off by more than a few degrees, then the sensor should be replaced, as the incorrect reading may interfere with proper AC system functions.
The ambient temperature sensor plays an important role in the overall operation of the AC system. For this reason, if you suspect that your ambient temperature sensor has failed, or is having a problem, have a professional technician, such as one from YourMechanic, inspect the AC system and replace the sensor if necessary.
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