B0179 - Output Air Temperature Sensor 2 Circuit Range/Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

B0179 Possible Causes

  • Faulty Output Air Temperature Sensor 2
  • Output Air Temperature Sensor 2 harness is open or shorted
  • Output Air Temperature Sensor 2 circuit poor electrical connection
  • Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

First diagnose B0179 code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the B0179 code

    Labor: 1.0

    The cost of diagnosing the B0179 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

B0179 Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B0179 Meaning

Air temperature sensors allow the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the discharge duct air, outside air and inside air temperatures. The HVAC control module provides ground to the air temperature sensor through the low reference circuit. The HVAC control module monitors the voltage drop across the air temperature sensor thermistor by supplying a 5 volt reference to the signal circuit of the air temperature sensor for automatic control calculations. When the air temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the air temperatures are hot, the resistances of the sensors are low and the voltage signals are low. The HVAC control module can read voltage values and count values where 1 volt is approximately equal to 51 counts.
OBDII Code B0179 - Output Air Temperature Sensor 2 Circuit Range/Performance - Engine-Codes.com

B0179 More Information

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B0179 Information for specific makes

  • B0179 BUICK Output Air Temperature Sensor 2 Circuit Range/Performance
  • B0179 CADILLAC Output Air Temperature Sensor 2 Circuit Range/Performance
  • B0179 CHEVROLET Output Air Temperature Sensor 2 Circuit Range/Performance
  • B0179 GMC Output Air Temperature Sensor 2 Circuit Range/Performance

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