AutoCodes - Generic - B0174

B0174 Code - Output Air Temperature Sensor 1 Circuit Range/Performance

Repair Importance Level: 1/3
Repair Difficulty Level: 2/3
Table of contents

|B0174 code possible 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

|How do I fix the B0174 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 connector's pins.

|Cost of diagnosing the B0174 code

Labor: 1.0

The cost of diagnosing the B0174 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B0174 code possible symptoms?

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

|B0174 code description

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 B0174 - Output Air Temperature Sensor 1 Circuit Range/Performance - AutoCodes.com

|Need more information with the B0174 code?

Need more information on how to fix the B0174 code? Get Access to Factory Service Manuals

|B0174 code information for specific makes

  • B0174 BUICK Output Air Temperature Sensor 1 Circuit Range/Performance
  • B0174 CADILLAC Output Air Temperature Sensor 1 Circuit Range/Performance
  • B0174 CHEVROLET Output Air Temperature Sensor 1 Circuit Range/Performance
  • B0174 GMC Output Air Temperature Sensor 1 Circuit Range/Performance

|Need help with a B0174 code?

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|B0174 code comments

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Repair Importance Level: 1
 
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Repair Difficulty Level: 2
 
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