B3933 2018 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 2018 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.
Code B3933 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC B3933 2018 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 2018 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 2018 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.
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Frequently Asked Questions about B3933 2018 Chevrolet Silverado Code
What does the OBDII code B3933 mean on a 2018 Chevrolet Silverado?
Code B3933 indicates an issue with the Air Conditioning Evaporator Temperature Sensor Circuit, which monitors the temperature of the evaporator to regulate the A/C system.
What are the common symptoms of code B3933 in a 2018 Chevrolet Silverado?
Common symptoms include the A/C system not working properly, inconsistent cabin temperature, or the A/C blowing warm air.
What causes the B3933 code to appear?
Possible causes include a faulty evaporator temperature sensor, damaged wiring or connectors, or issues with the HVAC control module.
Can I drive my 2018 Chevrolet Silverado with code B3933?
Yes, but the A/C system may not work correctly, which can lead to discomfort. Addressing the issue promptly is recommended to restore proper function.
How do I diagnose the B3933 code?
Start by checking the evaporator temperature sensor, inspecting wiring and connectors for damage, and using a scan tool to monitor sensor readings.
How do I fix code B3933 on a 2018 Chevrolet Silverado?
Repairs may involve replacing the evaporator temperature sensor, repairing damaged wiring, or reprogramming or replacing the HVAC control module if necessary.
Where is the evaporator temperature sensor located on a 2018 Chevrolet Silverado?
The evaporator temperature sensor is typically located in the HVAC housing near the evaporator core.
What tools are needed to repair code B3933?
You may need a multimeter, a scan tool, and basic hand tools to inspect and repair the sensor and wiring.
How much does it cost to repair code B3933?
Repair costs can vary, but replacing the evaporator temperature sensor typically ranges from $100 to $300, including parts and labor.
Can resetting the ECM clear code B3933?
Resetting the ECM might temporarily clear the code, but the issue will return if the underlying problem is not resolved.
Discuss the causes and fixes for B3933 2018 Chevrolet Silverado OBDII Code
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