AutoCodes – Chevrolet – B0333 Chevrolet

B0333 Chevrolet Code - Ambient Air Temperature Sensor Open

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 Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient 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: B0333 Chevrolet indicates Ambient Air Temperature Sensor Open.
Common causes: Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient 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 1,886

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 B0333 Chevrolet 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 B0333 Chevrolet - Ambient Air Temperature Sensor Open - AutoCodes.com — B0333 Chevrolet Code - Ambient Air Temperature Sensor Open

What does this mean?

What are the Possible Causes of the DTC B0333 Chevrolet?

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

How to Fix the DTC B0333 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0333 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 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 B0333 Chevrolet Code

1. What are the common symptoms of an Ambient Air Temperature Sensor Open error code (B0333) in a Chevrolet?

- Common symptoms include inaccurate outside temperature readings on the vehicle display, incorrect climate control system operation, or a warning light on the dashboard.

2. What can cause the Ambient Air Temperature Sensor Open code (B0333) to appear in a Chevrolet?

- The code may be triggered by a faulty ambient air temperature sensor, damaged wiring or connectors, or a malfunction in the sensor circuit.

3. How can I diagnose the Ambient Air Temperature Sensor Open issue in my Chevrolet?

- Use a multimeter to test the sensor's resistance, check the wiring and connectors for any damage, and inspect the sensor location for any obstructions or physical damage.

4. Can I drive my Chevrolet with the Ambient Air Temperature Sensor Open code (B0333) without causing further damage?

- While it is generally safe to drive with this error code, it's recommended to address the issue promptly to ensure proper operation of the climate control system and accurate temperature readings.

5. How can I repair the Ambient Air Temperature Sensor Open error code (B0333) in my Chevrolet?

- Repair options may include replacing the ambient air temperature sensor, repairing damaged wiring or connectors, or resetting the error code with an OBDII scanner after addressing the underlying issue.

6. Are there any DIY tips for fixing the Ambient Air Temperature Sensor Open issue in a Chevrolet?

- If you have experience working with automotive electrical systems, you may be able to replace the sensor yourself following a repair manual or online guides. However, professional diagnosis and repair are recommended for accurate results.

7. Will resetting the error code resolve the Ambient Air Temperature Sensor Open issue in my Chevrolet?

- Resetting the error code may clear the warning light temporarily, but it will not fix the underlying problem causing the code. Proper diagnosis and repair are necessary to address the issue effectively.

8. How much does it typically cost to fix the Ambient Air Temperature Sensor Open error in a Chevrolet?

- The cost of repairing the Ambient Air Temperature Sensor Open issue can vary depending on the cause of the problem, the labor rates in your area, and whether you choose to do the repair yourself or take it to a professional mechanic.

9. Can extreme weather conditions affect the Ambient Air Temperature Sensor Open error in a Chevrolet?

- Yes, extreme heat or cold can potentially impact the ambient air temperature sensor's performance and trigger the B0333 error code. It's important to keep the sensor and its surroundings free from debris and damage.

10. Is the Ambient Air Temperature Sensor Open error code (B0333) specific to Chevrolet vehicles?

- While the B0333 code is commonly associated with Chevrolet vehicles, it may also appear in other makes and models that use similar ambient air temperature sensor systems.