B3933
Air Conditioning Evaporator Temperature Sensor Circuit
B3933 is an OBD-II diagnostic trouble code meaning: Air Conditioning Evaporator Temperature Sensor Circuit. Common causes: open or short circuit in the sensor wiring harness, evaporator temperature sensor malfunction. Estimated repair cost: $33–89.
Symptoms
- Incorrect operation of the air conditioner
- The air conditioner turns off spontaneously
- Insufficient interior cooling
- Fogging of glasses due to high humidity
Causes
- Open or short circuit in the sensor wiring harness
- Evaporator temperature sensor malfunction
- Poor contact in the sensor connector
- Problems with the climate control unit
How to Fix
- Check the integrity of the sensor wiring harness
- Check sensor resistance (usually should be between 1-10 kOhm depending on temperature)
- Inspect the sensor connector for corrosion or damage.
- If necessary, replace the evaporator temperature sensor
- Reset the error and check the system operation
Related codes
Error B3933 by Vehicle Brand
FAQ
What does the B3933 code mean?
B3933 is an OBD-II diagnostic trouble code that indicates: Air Conditioning Evaporator Temperature Sensor Circuit
What causes a B3933 error code?
The most common causes of B3933 include: Open or short circuit in the sensor wiring harness; Evaporator temperature sensor malfunction; Poor contact in the sensor connector; Problems with the climate control unit.
How do I fix a B3933 diagnostic trouble code?
To fix B3933: Check the integrity of the sensor wiring harness. Check sensor resistance (usually should be between 1-10 kOhm depending on temperature). Inspect the sensor connector for corrosion or damage.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3933?
Limited driving only, diagnose soon
How much does it cost to fix B3933?
The estimated repair cost for B3933 is $33–89. Actual cost depends on your vehicle, location, and labor rates.
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