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B0173 Buick Code - Output Air Temperature Sensor 1 Circuit

- Code Popularity: 1,230 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC B0173 Buick?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Output Air Temperature Sensor 1
  • Output Air Temperature Sensor 1 harness is open or shorted
  • Output Air Temperature Sensor 1 circuit poor electrical connection
  • Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module
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How to Fix the DTC B0173 Buick?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

B0173 05: Output Air Temperature Sensor 1 Circuit Short to Battery or Open
B0173 02: Output Air Temperature Sensor 1 Circuit Short to Ground

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0173 Buick code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code B0173 Buick Description

Air temperature sensors allow the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the discharge air in the HVAC ducts. The module applies 5 volts to internal input resistors that are connected to the signal circuits of the air temperature sensors. The module provides ground to the air temperature sensors through the low reference circuit. The HVAC control module monitors the voltage drops across the air temperature sensors and uses the inputs for automatic control calculations. When the duct air temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the duct air temperatures are hot, the resistances of the sensors are low and the voltage signals are low. The HVAC control module converts the voltage values to count values where 1 volt is approximately equal to 51 counts.

OBDII Code B0173 Buick - Output Air Temperature Sensor 1 Circuit - AutoCodes.com
B0173 Buick Code - Output Air Temperature Sensor 1 Circuit

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