Engine-Codes - Cadillac - B3933 Cadillac

B3933 Cadillac Code - Air Conditioning Evaporator Temperature Sensor Circuit

- Code Popularity: 913 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B3933 Cadillac?

  • 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 B3933 Cadillac Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the Cost to Diagnose the Code B3933 Cadillac?

Labor: 1.0

The cost to diagnose the B3933 Cadillac code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are Code B3933 Cadillac Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the B3933 Cadillac Code Mean?

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 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 Heating, Ventilation, and Air Conditioning (HVAC) Control Module detects voltage greater than 4.9 V on the temperature signal circuit.

Air Conditioning Evaporator Temperature Sensor Circuit

|Need more Information on the B3933 Cadillac Code?

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|Need Help with the B3933 Cadillac Code?

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