B0408 2017 Chevrolet Silverado Code - Main Temperature Control Circuit
Quick Answer
Stepper motors are used for temperature regulation, air distribution control and recirculation door control. Common causes include Faulty Air Temperature Actuator, Air Temperature Actuator harness is open or shorted, Air Temperature Actuator circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B0408 2017 Chevrolet Silverado indicates Main Temperature Control Circuit.
- Common causes
- Common causes include Faulty Air Temperature Actuator, Air Temperature Actuator harness is open or shorted, Air Temperature Actuator circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code B0408 2017 Chevrolet Silverado Description
What are the Possible Causes of the DTC B0408 2017 Chevrolet Silverado?
- Faulty Air Temperature Actuator
- Air Temperature Actuator harness is open or shorted
- Air Temperature Actuator circuit poor electrical connection
- Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module
How to Fix the DTC B0408 2017 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.
Code Tech Notes
B0413:05 Main Temperature Control Circuit Short to Battery or Open
B0413:61 Main Temperature Control Circuit Actuator Stuck Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B0408 2017 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 B0408 2017 Chevrolet Silverado code?
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Frequently Asked Questions about B0408 2017 Chevrolet Silverado Code
1. What does the OBDII code B0408 indicate on a 2017 Chevrolet Silverado?
The code B0408 indicates a fault in the Main Temperature Control Circuit, specifically that there is an issue with the actuator or the control circuit for the HVAC system's temperature blend door.
2. What symptoms might I notice if my 2017 Chevrolet Silverado has the B0408 code?
Symptoms can include the HVAC system failing to adjust cabin temperature properly, the temperature being stuck on hot or cold regardless of setting, and possibly hearing clicking noises from the dashboard.
3. What are common causes of the B0408 code in a 2017 Chevrolet Silverado?
Common causes include a faulty temperature blend door actuator, a broken blend door, or issues with the wiring or electrical connections related to the temperature control system.
4. How can I fix the B0408 code on my 2017 Chevrolet Silverado?
Repairing this code typically involves replacing the faulty blend door actuator, repairing any broken blend doors, or fixing any associated wiring issues. It's vital to test the system post-repair to ensure the issue is resolved.
5. Is it safe to drive my 2017 Chevrolet Silverado with the B0408 code active?
While it's generally safe to drive with this code, comfort may be an issue as the HVAC system may not properly regulate cabin temperature, which could be problematic in extreme weather conditions.
6. How do I diagnose the B0408 code on my 2017 Chevrolet Silverado?
Diagnosis involves using a scan tool to confirm the B0408 code, visually inspecting the blend door actuator and related components, and checking for any electrical issues such as damaged wires or poor connections.
7. Can ignoring the B0408 code lead to other problems in my 2017 Chevrolet Silverado?
Ignoring this code can lead to prolonged discomfort due to improper HVAC function and potentially mask other underlying issues within the HVAC system if not addressed timely.
8. What tools are required to fix the B0408 code in a 2017 Chevrolet Silverado?
Tools needed may include a scan tool to diagnose the code, basic hand tools to access and replace the actuator or repair components, and possibly a multimeter for checking electrical connections.
9. How much does it typically cost to resolve the B0408 code in a 2017 Chevrolet Silverado?
Costs can vary widely depending on whether the issue is with the actuator, the blend door itself, or electrical components. Typically, you might expect to pay between $150 to $400 for parts and labor.
10. After repairing the B0408 code in my 2017 Chevrolet Silverado, what steps should be taken to ensure the issue is fully resolved?
After repairs, perform a full calibration of the HVAC system if necessary, clear the B0408 code from the vehicle’s memory with a scan tool, and test the system to ensure it is operating correctly and adjusting temperature as commanded.
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