B3979 2016 Chevrolet Silverado Code - Incorrect Environmental Identifier Received from HVAC Control Module
Quick Answer
When certain modules are programmed and configured during installation, the module learns a specific environment identifier which is unique to the vehicle. Common causes include Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module, HVAC Control Module harness is open or shorted, HVAC Control Module 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
- B3979 2016 Chevrolet Silverado indicates Incorrect Environmental Identifier Received from HVAC Control Module.
- Common causes
- Common causes include Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module, HVAC Control Module harness is open or shorted, HVAC Control Module 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 B3979 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC B3979 2016 Chevrolet Silverado?
- Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module
- HVAC Control Module harness is open or shorted
- HVAC Control Module circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3979 2016 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 B3979 2016 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 B3979 2016 Chevrolet Silverado code?
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Frequently Asked Questions about B3979 2016 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code B3979 on a 2016 Chevrolet Silverado?
- Common symptoms include issues with the heating, ventilation, and air conditioning (HVAC) system such as incorrect temperature readings, inconsistent airflow, or the HVAC controls not responding properly.
2. What does the OBDII code B3979 "Incorrect Environmental Identifier Received from HVAC Control Module" mean for a 2016 Chevrolet Silverado?
- This code indicates that the HVAC control module has received an incorrect environmental identifier, which can lead to malfunctions in the HVAC system.
3. What are possible causes of OBDII code B3979 on a 2016 Chevrolet Silverado?
- Possible causes include a faulty HVAC control module, wiring issues, a malfunctioning environmental sensor, or a software glitch in the system.
4. How can I diagnose OBDII code B3979 on my 2016 Chevrolet Silverado?
- Diagnosing this code typically involves using a professional OBDII scanner to retrieve the specific fault codes and then inspecting the HVAC control module, sensors, and wiring for any visible damage.
5. Can I still drive my 2016 Chevrolet Silverado with OBDII code B3979 present?
- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid potential discomfort or safety concerns related to the HVAC system.
6. How can I repair OBDII code B3979 on a 2016 Chevrolet Silverado?
- Repairing this code usually involves replacing the faulty HVAC control module, fixing any damaged wiring, recalibrating the environmental sensor, or updating the system software as needed.
7. Is it possible to reset OBDII code B3979 on a 2016 Chevrolet Silverado without repairing the issue?
- While you can clear the code temporarily with an OBDII scanner, it is crucial to address the underlying problem causing the code to prevent it from recurring.
8. How much does it cost to fix OBDII code B3979 on a 2016 Chevrolet Silverado?
- The cost of fixing this code can vary depending on the specific issue, but it may involve parts and labor expenses ranging from $200 to $600 or more, depending on the extent of the repairs needed.
9. Can a DIY enthusiast repair OBDII code B3979 on a 2016 Chevrolet Silverado?
- While some simple troubleshooting steps can be done by a DIY enthusiast, diagnosing and repairing this code often requires specialized tools and expertise, so it is recommended to consult a professional mechanic for proper repairs.
10. How can I prevent OBDII code B3979 from appearing on my 2016 Chevrolet Silverado in the future?
- Regular maintenance of the HVAC system, checking for any signs of malfunction, and addressing issues promptly can help prevent the recurrence of this code in the future.
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