AutoCodes – Chevrolet – B3933 2017 Chevrolet Silverado

B3933 2017 Chevrolet Silverado Code - Air Conditioning Evaporator Temperature Sensor Circuit

Quick Answer

The air temperature sensors are a 2-wire negative temperature coefficient thermistor. Common causes include Faulty Air Conditioning Evaporator Temperature Sensor, Air Conditioning Evaporator Temperature Sensor harness is open or shorted, Air Conditioning Evaporator Temperature Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B3933 2017 Chevrolet Silverado indicates Air Conditioning Evaporator Temperature Sensor Circuit.
Common causes: Common causes include Faulty Air Conditioning Evaporator Temperature Sensor, Air Conditioning Evaporator Temperature Sensor harness is open or shorted, Air Conditioning Evaporator Temperature Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 260

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 17, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3933 2017 Chevrolet Silverado Description

The air temperature sensors are a 2-wire negative temperature coefficient thermistor. This sensor operates using signal and low reference circuits. As the air temperature surrounding the sensor increases, the sensor resistance decreases. The sensor is capable of reading temperatures ranging from -40 to +80°C (-40 to +176°F), with a signal voltage between 0-5 V. If the Heating, Ventilation, and Air Conditioning (HVAC) Control Module detects a malfunctioning sensor the software uses a default air temperature value. The default action ensures that the HVAC system can adjust the inside air temperature near the desired temperature until the condition is corrected. The Diagnostic Trouble Code (DTC) sets when the input signal is out of range. The HVAC Control Module detects a voltage greater than 4.9 V on the temperature signal circuit.

OBDII Code B3933 2017 Chevrolet Silverado - Air Conditioning Evaporator Temperature Sensor Circuit - AutoCodes.com — B3933 2017 Chevrolet Silverado Code - Air Conditioning Evaporator Temperature Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B3933 2017 Chevrolet Silverado?

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

How to Fix the DTC B3933 2017 Chevrolet Silverado?

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 B3933 2017 Chevrolet Silverado 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 B3933 2017 Chevrolet Silverado code?

Need more information on how to fix the B3933 2017 Chevrolet Silverado 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 B3933 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B3933 in a 2017 Chevrolet Silverado related to the Air Conditioning Evaporator Temperature Sensor Circuit?

The common symptoms include erratic air conditioning performance, poor cooling efficiency, or complete failure of the air conditioning system.

2. What are the potential causes of OBDII code B3933 in a 2017 Chevrolet Silverado?

Possible causes include a faulty air conditioning evaporator temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the HVAC control module.

3. How can I diagnose the Air Conditioning Evaporator Temperature Sensor Circuit issue in my 2017 Chevrolet Silverado?

To diagnose the problem, you can use an OBDII scanner to retrieve the specific trouble code (B3933) and then inspect the air conditioning system components for any visible damage or issues.

4. Can I continue driving my 2017 Chevrolet Silverado with OBDII code B3933 related to the Air Conditioning Evaporator Temperature Sensor Circuit?

It is not recommended to continue driving with this code unresolved, as it can lead to further damage to the air conditioning system and potentially affect the vehicle's overall performance.

5. What are some repair tips for fixing OBDII code B3933 in a 2017 Chevrolet Silverado?

Repair tips include checking and replacing the air conditioning evaporator temperature sensor, inspecting and repairing any damaged wiring or connectors, and resetting the trouble code after repairs are completed.

6. How much does it typically cost to repair OBDII code B3933 in a 2017 Chevrolet Silverado?

The cost of repair can vary depending on the extent of the damage and the specific parts that need to be replaced. It is recommended to consult a professional mechanic for an accurate estimate.

7. Is it possible to reset OBDII code B3933 in a 2017 Chevrolet Silverado without fixing the underlying issue?

While you can clear the trouble code using an OBDII scanner, it is not advisable to do so without addressing the root cause of the problem, as it may lead to recurring issues with the air conditioning system.

8. Are there any preventive measures to avoid OBDII code B3933 in a 2017 Chevrolet Silverado in the future?

Regular maintenance of the air conditioning system, including checking the sensors and wiring for any signs of wear or damage, can help prevent issues like B3933 from occurring.

9. Can extreme weather conditions contribute to triggering OBDII code B3933 in a 2017 Chevrolet Silverado?

Extreme heat or cold can potentially affect the performance of the air conditioning system and its components, including the evaporator temperature sensor, leading to the triggering of code B3933.

10. How long does it typically take to repair OBDII code B3933 in a 2017 Chevrolet Silverado related to the Air Conditioning Evaporator Temperature Sensor Circuit?

The repair time can vary depending on the extent of the issue and the availability of parts. Minor repairs may take a few hours, while more complex repairs might require a day or more.