AutoCodes – GMC – B0164 GMC

B0164 GMC Code - Inside Air Temperature Sensor Circuit Range/Performance

Quick Answer

The ambient air temperature sensor allows the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the air surrounding the front of the vehicle. Common causes include Faulty Inside Air Temperature Sensor, Inside Air Temperature Sensor harness is open or shorted, Inside Air Temperature Sensor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0164 GMC indicates Inside Air Temperature Sensor Circuit Range/Performance.
Common causes: Common causes include Faulty Inside Air Temperature Sensor, Inside Air Temperature Sensor harness is open or shorted, Inside Air Temperature Sensor circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 4,291

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0164 GMC Description

The ambient air temperature sensor allows the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the air surrounding the front of the vehicle. The inside air temperature sensor assembly allows the HVAC control module to monitor the temperature of the air inside the passenger compartment. 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 circuits. The HVAC control module monitors the voltage drops across the air temperature sensors and uses the inputs for automatic control calculations. The HVAC control module also uses the ambient air temperature input to calculate the value of the ambient air temperature display. 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.

OBDII Code B0164 GMC - Inside Air Temperature Sensor Circuit Range/Performance - AutoCodes.com — B0164 GMC Code - Inside Air Temperature Sensor Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC B0164 GMC?

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

How to Fix the DTC B0164 GMC?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0164 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B0164 GMC code?

Need more information on how to fix the B0164 GMC code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B0164 GMC Code

1. What does the OBDII code B0164 GMC indicate?

- Code B0164 GMC indicates a problem with the Inside Air Temperature Sensor Circuit, specifically pointing to a range/performance issue.

2. What are the common symptoms of the B0164 GMC code?

- Symptoms may include inconsistent cabin temperature, the air conditioning system not functioning correctly, and the temperature display showing incorrect readings.

3. What can cause the B0164 GMC code to be triggered?

- Causes can include a faulty inside air temperature sensor, poor electrical connections to the sensor, or a problem with the climate control unit.

4. How can I troubleshoot the B0164 GMC code?

- Start by checking the inside air temperature sensor for any visible damage or loose connections. Also, inspect the wiring and connectors for corrosion or damage. If everything appears normal, testing the sensorâ€™s resistance with a multimeter might be necessary.

5. What steps are involved in repairing code B0164 on a GMC vehicle?

- Repair steps typically involve inspecting and cleaning the sensorâ€™s connections, replacing the inside air temperature sensor if it is faulty, and checking the climate control unit for faults. Resetting the climate control system's settings might also be necessary.

6. Is it safe to drive my GMC with the B0164 code active?

- While it is generally safe to drive with this code active, the comfort of the vehicle might be compromised, and the HVAC system may not operate efficiently. It's best to address the issue promptly for optimal comfort.

7. How do I reset the inside air temperature sensor after repairs are made for code B0164?

- After repairs, you can reset the sensor by disconnecting the battery for a few minutes or by using an OBDII scanner to clear the code from the vehicle's computer system.

8. Are there any specific tools required to diagnose the B0164 GMC code?

- Diagnosing this code typically requires an OBDII scanner to read and clear the code, along with a multimeter for testing sensor functionality and wiring integrity.

9. Can a malfunctioning inside air temperature sensor affect the fuel efficiency of my GMC?

- While it primarily affects comfort, a malfunctioning inside air temperature sensor can lead the HVAC system to run inefficiently, potentially having a minor impact on fuel efficiency due to increased load on the engine.