AutoCodes – GMC – B0168 GMC

B0168 GMC Code - Passenger Compartment Temperature Sensor 2 Circuit

Quick Answer

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. Common causes include Faulty Passenger Compartment Temperature Sensor 2, Passenger Compartment Temperature Sensor 2 harness is open or shorted, Passenger Compartment Temperature Sensor 2 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: B0168 GMC indicates Passenger Compartment Temperature Sensor 2 Circuit.
Common causes: Common causes include Faulty Passenger Compartment Temperature Sensor 2, Passenger Compartment Temperature Sensor 2 harness is open or shorted, Passenger Compartment Temperature Sensor 2 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 1,645

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0168 GMC 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 B0168 GMC - Passenger Compartment Temperature Sensor 2 Circuit - AutoCodes.com — B0168 GMC Code - Passenger Compartment Temperature Sensor 2 Circuit

What does this mean?

What are the Possible Causes of the DTC B0168 GMC?

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

How to Fix the DTC B0168 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 does this mean?

Code Tech Notes

B0168 05: Passenger Compartment Temperature Sensor 2 Circuit Short to Battery or Open
B0168 02: Passenger Compartment Temperature Sensor 2 Circuit Short to Ground

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0168 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.

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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 B0168 GMC Code

1. What are the common symptoms of OBDII code B0168 GMC?

The common symptoms of OBDII code B0168 GMC, which relates to the Passenger Compartment Temperature Sensor 2 Circuit, include inaccurate temperature readings on the climate control system, inconsistent heating or cooling performance, and a malfunctioning automatic climate control system.

2. What can cause OBDII code B0168 GMC to trigger?

OBDII code B0168 GMC is typically triggered by a fault in the passenger compartment temperature sensor 2 circuit or a malfunction in the sensor itself. Wiring issues, sensor damage, or a faulty climate control module can also cause this code to appear.

3. How can I diagnose the issue related to OBDII code B0168 GMC?

To diagnose the problem related to OBDII code B0168 GMC, you can use a scan tool to read the code and perform a visual inspection of the passenger compartment temperature sensor 2 and its wiring. Testing the sensor's resistance and checking for any loose connections can help pinpoint the issue.

4. What are some repair tips for fixing OBDII code B0168 GMC?

Repairing OBDII code B0168 GMC may involve replacing the passenger compartment temperature sensor 2, repairing or replacing damaged wiring, or addressing any issues with the climate control module. It's important to follow the manufacturer's diagnostic and repair procedures for an accurate fix.

5. Can I drive my vehicle with OBDII code B0168 GMC active?

While it may be possible to drive your vehicle with OBDII code B0168 GMC active, it is not recommended as it can lead to poor heating or cooling performance and potential issues with the climate control system. It's best to address the problem promptly to ensure proper functionality.

6. How critical is the repair for OBDII code B0168 GMC?

The repair for OBDII code B0168 GMC, related to the Passenger Compartment Temperature Sensor 2 Circuit, is important for maintaining the proper functioning of the climate control system in your vehicle. Ignoring the issue can lead to discomfort while driving and potential long-term damage to the system.

7. Can a DIY enthusiast fix OBDII code B0168 GMC?

Depending on your skill level and access to tools, a DIY enthusiast may be able to fix OBDII code B0168 GMC by replacing the passenger compartment temperature sensor 2 or addressing wiring issues. However, it's recommended to consult a professional mechanic for an accurate diagnosis and repair.

8. How much does it cost to repair OBDII code B0168 GMC?

The cost to repair OBDII code B0168 GMC can vary depending on the cause of the issue, the parts needed for replacement, and labor costs. On average, the repair for this code may range from $100 to $300, but prices can differ based on the specific circumstances of the repair.

9. What are the long-term effects of ignoring OBDII code B0168 GMC?

Ignoring OBDII code B0168 GMC can result in continued inaccuracies in the climate control system, leading to discomfort while driving and potential strain on other components. Addressing the issue promptly can prevent further damage and ensure the proper functioning of the system.

10. How can I prevent OBDII code B0168 GMC from recurring?

To prevent OBDII code B0168 GMC from recurring, it's essential to perform regular maintenance on your vehicle, including checking the climate control system for any signs of malfunction. Addressing any issues promptly and following proper diagnostic procedures can help prevent the code from reappearing.