AutoCodes – Chevrolet – B0168 Chevrolet

B0168 Chevrolet 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 Chevrolet 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 3,961

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 Chevrolet 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 Chevrolet - Passenger Compartment Temperature Sensor 2 Circuit - AutoCodes.com — B0168 Chevrolet Code - Passenger Compartment Temperature Sensor 2 Circuit

What does this mean?

What are the Possible Causes of the DTC B0168 Chevrolet?

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 Chevrolet?

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 Chevrolet 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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Need more information on how to fix the B0168 Chevrolet 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 B0168 Chevrolet Code

1. What are common symptoms of OBDII code B0168 in a Chevrolet related to the Passenger Compartment Temperature Sensor 2 Circuit?

- Common symptoms include inaccurate interior temperature readings on the climate control system, irregular operation of the HVAC system, and potential issues with automatic climate control settings.

2. What could cause the OBDII code B0168 to be triggered in a Chevrolet?

- The code B0168 for the Passenger Compartment Temperature Sensor 2 Circuit may be triggered by a faulty temperature sensor, damaged wiring or connectors, or a malfunction in the climate control module.

3. How can I diagnose the cause of OBDII code B0168 in my Chevrolet?

- Diagnosing the issue involves checking the wiring and connectors associated with the temperature sensor, testing the sensor itself for proper operation, and using a scan tool to evaluate the climate control module's functionality.

4. Can I still drive my Chevrolet with OBDII code B0168 active?

- It is generally safe to drive the vehicle with the B0168 code, but you may experience issues with the HVAC system's performance and accuracy until the problem is resolved.

5. What are the repair options for fixing OBDII code B0168 in a Chevrolet?

- Repair options include replacing the Passenger Compartment Temperature Sensor 2, repairing damaged wiring or connectors, or possibly reprogramming or replacing the climate control module if deemed necessary.

6. How much does it typically cost to repair OBDII code B0168 in a Chevrolet?

- The cost of repairing the B0168 code varies depending on the specific cause of the issue, but it could range from around $100 to $300 for parts and labor.

7. Are there any DIY tips for addressing OBDII code B0168 in a Chevrolet?

- DIY enthusiasts with automotive repair experience may attempt to inspect and replace the temperature sensor or check for obvious wiring issues, but complex diagnostic and repair tasks should be handled by a professional.

8. Will clearing the OBDII code B0168 in my Chevrolet make the issue go away?

- Clearing the code may temporarily turn off the Check Engine Light, but if the underlying problem causing the B0168 code persists, the light is likely to come back on after some driving cycles.

9. How urgent is it to address OBDII code B0168 in a Chevrolet?

- While it's not typically an urgent issue, addressing the B0168 code is recommended to ensure proper functioning of the climate control system and to prevent potential discomfort or inconvenience while driving.

10. Can OBDII code B0168 in a Chevrolet cause any other problems if left unresolved?

- Leaving the B0168 code unresolved may lead to continued inaccuracies in the interior temperature readings, potential issues with the HVAC system's performance, and could affect the overall comfort level inside the vehicle.