AutoCodes – Hummer – B0164 Hummer

B0164 Hummer 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 Hummer 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 3,480

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

What does this mean?

What are the Possible Causes of the DTC B0164 Hummer?

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 Hummer?

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 Hummer 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 Hummer code?

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

Need Help with the Code?

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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 Hummer Code

1. What are the common symptoms of OBDII code B0164 in a Hummer?

The common symptoms of OBDII code B0164 in a Hummer include inaccurate readings on the inside air temperature display, inconsistent heating or cooling in the vehicle, and potential issues with the climate control system.

2. What can cause the OBDII code B0164 in a Hummer?

The OBDII code B0164 in a Hummer is typically caused by a faulty inside air temperature sensor, wiring issues in the sensor circuit, or a malfunction in the climate control module.

3. How can I diagnose the OBDII code B0164 in my Hummer?

Diagnosing OBDII code B0164 in a Hummer involves checking the inside air temperature sensor for proper operation, inspecting the sensor circuit for any wiring damage, and using a diagnostic scanner to read the code and troubleshoot the issue.

4. Can I still drive my Hummer with OBDII code B0164?

While it may be possible to drive your Hummer with OBDII code B0164, it is not recommended as the inaccurate temperature readings can affect the performance of the climate control system and lead to discomfort while driving.

5. How can I repair OBDII code B0164 in my Hummer?

Repairing OBDII code B0164 in a Hummer involves replacing the faulty inside air temperature sensor, repairing any damaged wiring in the sensor circuit, or resetting the climate control module to clear the code and restore proper operation.

6. Is it possible to reset the OBDII code B0164 in a Hummer without repairs?

While you can attempt to reset the OBDII code B0164 in a Hummer using a diagnostic scanner, it is important to address the underlying issue causing the code to prevent it from recurring.

7. Can extreme temperatures affect the inside air temperature sensor in a Hummer?

Extreme temperatures can potentially affect the inside air temperature sensor in a Hummer, leading to inaccurate readings and triggering OBDII code B0164. It is important to keep the sensor and sensor circuit protected from extreme conditions.

8. How long does it take to repair OBDII code B0164 in a Hummer?

The time needed to repair OBDII code B0164 in a Hummer can vary depending on the exact cause of the issue. Simple sensor replacements may take less than an hour, while more complex wiring repairs or module resets could take longer.

9. Will OBDII code B0164 cause any long-term damage to my Hummer?

While OBDII code B0164 itself may not cause immediate long-term damage to your Hummer, ignoring the issue can lead to discomfort while driving and potential strain on the climate control system over time. It is best to address the code promptly.

10. Can a DIY enthusiast repair OBDII code B0164 in a Hummer?

If you have the necessary tools, knowledge, and experience working on automotive electrical systems, you may be able to repair OBDII code B0164 in a Hummer as a DIY project. However, it is recommended to consult a professional if you are unsure about the diagnosis or repair process.