B3933 GMC 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 GMC 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 GMC Description
What are the Possible Causes of the DTC B3933 GMC?
- 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 GMC?
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 GMC 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 GMC code?
Need more information on how to fix the B3933 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B3933 GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- B3933 2014 GMC Sierra — Air Conditioning Evaporator Temperature Sensor Circuit
- B3933 2015 GMC Sierra — Air Conditioning Evaporator Temperature Sensor Circuit
- B3933 2016 GMC Sierra — Air Conditioning Evaporator Temperature Sensor Circuit
- B3933 2017 GMC Sierra — Air Conditioning Evaporator Temperature Sensor Circuit
- B3933 2018 GMC Sierra — Air Conditioning Evaporator Temperature Sensor Circuit
Frequently Asked Questions about B3933 GMC Code
1. What are common symptoms of OBDII code B3933 GMC related to the Air Conditioning Evaporator Temperature Sensor Circuit?
- Common symptoms include issues with the air conditioning system, such as inconsistent cooling or lack of cooling.
2. What are the possible causes of OBDII code B3933 GMC?
- Possible causes include a faulty evaporator temperature sensor, damaged wiring or connectors in the sensor circuit, or a problem with the HVAC control module.
3. How can I diagnose the Air Conditioning Evaporator Temperature Sensor Circuit issue?
- Diagnosis typically involves using a scan tool to read the OBDII code, testing the sensor's resistance, and inspecting the wiring and connectors for any visible damage.
4. Can a DIYer repair OBDII code B3933 GMC at home?
- Repairing this code may require some level of expertise, especially when dealing with the sensor and wiring. It's recommended to consult a professional mechanic for accurate diagnosis and repair.
5. Is it safe to continue driving with OBDII code B3933 GMC unresolved?
- It is generally safe to drive with this code, but you may experience discomfort due to the air conditioning issues. It's best to address the problem promptly to avoid further damage.
6. Are there any quick fixes or temporary solutions for OBDII code B3933 GMC?
- Quick fixes like checking and cleaning the sensor connections or resetting the HVAC system may temporarily alleviate the issue, but a permanent fix will likely require professional repair.
7. How much does it cost to repair OBDII code B3933 GMC related to the Air Conditioning Evaporator Temperature Sensor Circuit?
- Repair costs can vary depending on the exact cause of the issue, but expect to pay for sensor replacement, wiring repairs, and labor costs, which can range from $100 to $500 or more.
8. Can a bad evaporator temperature sensor affect other vehicle systems?
- A malfunctioning evaporator temperature sensor primarily impacts the air conditioning system's operation and may not directly affect other vehicle systems.
9. How long does it typically take to repair OBDII code B3933 GMC?
- Repair time can vary based on the extent of the issue and the availability of parts. In most cases, a professional mechanic can diagnose and repair this code within a few hours to a day.
10. Are there any preventive maintenance steps to avoid OBDII code B3933 GMC in the future?
- Regular HVAC system inspections and servicing, including checking the evaporator temperature sensor and its connections, can help prevent issues that trigger this code.
Discuss the causes and fixes for B3933 GMC OBDII Code
Code B3933 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
