AutoCodes – GMC – B0337 GMC

B0337 GMC Code - Inside Temperature Sensor Short To Ground

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 Temperature Sensor, Inside Temperature Sensor harness is open or shorted, Inside 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: B0337 GMC indicates Inside Temperature Sensor Short To Ground.
Common causes: Common causes include Faulty Inside Temperature Sensor, Inside Temperature Sensor harness is open or shorted, Inside 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 969

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 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0337 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 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 B0337 GMC - Inside Temperature Sensor Short To Ground - AutoCodes.com — B0337 GMC Code - Inside Temperature Sensor Short To Ground

What does this mean?

What are the Possible Causes of the DTC B0337 GMC?

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

How to Fix the DTC B0337 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 B0337 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 B0337 GMC 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 B0337 GMC Code

1. What are the common symptoms of OBDII code B0337 GMC (Inside Temperature Sensor Short To Ground)?

The common symptoms of this code may include inaccurate readings on the interior temperature display, HVAC system malfunctions, and potential issues with the climate control system.

2. What are the possible causes of OBDII code B0337 GMC?

The possible causes of this code include a short to ground in the wiring leading to the inside temperature sensor, a faulty inside temperature sensor, or a problem with the body control module.

3. How can I diagnose OBDII code B0337 GMC?

Diagnosing this code involves using a scan tool to read the trouble codes, checking the wiring and connections to the inside temperature sensor, testing the sensor itself, and inspecting the body control module for any faults.

4. Can I still drive my vehicle with OBDII code B0337 GMC present?

While it may be possible to drive the vehicle with this code, it is recommended to address the issue promptly to prevent further damage to the climate control system and ensure accurate temperature readings inside the vehicle.

5. How can I repair OBDII code B0337 GMC?

Repairing this code typically involves fixing the short to ground in the wiring, replacing the inside temperature sensor if necessary, or repairing/replacing the body control module if it is causing the issue.

6. Are there any DIY tips for fixing OBDII code B0337 GMC?

DIY tips for fixing this code may include checking the wiring and connections for visible damage, ensuring proper sensor installation, and consulting the vehicle's service manual for specific repair procedures.

7. Can a faulty inside temperature sensor cause other issues in the vehicle?

Yes, a faulty inside temperature sensor can cause issues with the HVAC system, climate control functions, and overall comfort levels inside the vehicle.

8. How can I prevent OBDII code B0337 GMC from recurring?

To prevent this code from recurring, it is essential to address any underlying wiring issues, ensure proper installation of components, and perform regular maintenance on the climate control system.

9. Is resetting the trouble codes enough to fix OBDII code B0337 GMC?

Resetting the trouble codes may clear the code temporarily, but it will not fix the underlying issue causing the code. It is crucial to diagnose and repair the problem to prevent the code from coming back.

10. Is it safe to ignore OBDII code B0337 GMC?

Ignoring this code may lead to inaccurate temperature readings inside the vehicle and potential issues with the climate control system. It is advisable to address the problem to maintain the functionality of the HVAC system.