AutoCodes – Cadillac – B0333 Cadillac

B0333 Cadillac 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 Cadillac 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 834

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

What does this mean?

What are the Possible Causes of the DTC B0333 Cadillac?

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 Cadillac?

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 Cadillac 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 B0333 Cadillac Code

1. What are common symptoms of an Ambient Air Temperature Sensor Open code B0333 on a Cadillac?

- Common symptoms include inaccurate outside temperature readings on the vehicle's display, issues with the climate control system, and potential impact on automatic lighting features.

2. What causes the Ambient Air Temperature Sensor Open code B0333 on a Cadillac?

- The code B0333 usually indicates an open circuit in the ambient air temperature sensor, which could be caused by a damaged sensor, a faulty wiring harness, or a poor connection.

3. How can I diagnose the Ambient Air Temperature Sensor Open issue on my Cadillac?

- To diagnose the issue, you can use a multimeter to test the resistance of the sensor and check the wiring for any visible damage or corrosion. It's also recommended to perform a visual inspection of the sensor and its surroundings.

4. Can I drive my Cadillac with the Ambient Air Temperature Sensor Open code B0333?

- While it is generally safe to drive with this code, you may experience issues with temperature-related systems in your vehicle. It's best to address the problem promptly to avoid any inconvenience.

5. How can I repair the Ambient Air Temperature Sensor Open code B0333 on my Cadillac?

- Repairing the code B0333 typically involves replacing the ambient air temperature sensor if it's faulty. Ensure the new sensor is compatible with your Cadillac model and follow proper installation procedures.

6. Will resetting the OBDII system clear the Ambient Air Temperature Sensor Open code B0333 on my Cadillac?

- Resetting the OBDII system may temporarily clear the code, but it will likely reappear if the underlying issue with the ambient air temperature sensor is not resolved.

7. Is it possible to bypass the Ambient Air Temperature Sensor on my Cadillac to avoid the B0333 code?

- Bypassing the ambient air temperature sensor is not recommended, as it serves important functions within the vehicle's systems. It's best to address the root cause of the code by properly repairing or replacing the sensor.

8. How much does it cost to replace the Ambient Air Temperature Sensor on a Cadillac?

- The cost of replacing the ambient air temperature sensor can vary depending on the model of your Cadillac and whether you choose to do the replacement yourself or have it done at a dealership or repair shop.

9. Are there any preventive measures to avoid the Ambient Air Temperature Sensor Open issue on my Cadillac?

- Regularly inspecting the ambient air temperature sensor and its wiring for any signs of damage or wear can help prevent the occurrence of the B0333 code. Additionally, avoiding exposure to harsh environmental conditions can prolong the sensor's lifespan.

10. Can a faulty Ambient Air Temperature Sensor affect the performance of other vehicle systems on a Cadillac?

- Yes, a faulty ambient air temperature sensor can impact the performance of climate control systems, automatic lighting features, and potentially affect fuel efficiency by providing inaccurate temperature readings to the vehicle's computer.