AutoCodes – Chevrolet – B1020 2017 Chevrolet Silverado

B1020 2017 Chevrolet Silverado Code - Auxiliary Electronic Control Unit Performance

Quick Answer

The Heating, Ventilation, and Air Conditioning (HVAC) module communicates with the HVAC controls via serial data. Common causes include Faulty Heating, Ventilation, and Air Conditioning (HVAC) Controls, HVAC Controls harness is open or shorted, HVAC Controls 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
B1020 2017 Chevrolet Silverado indicates Auxiliary Electronic Control Unit Performance.
Common causes
Common causes include Faulty Heating, Ventilation, and Air Conditioning (HVAC) Controls, HVAC Controls harness is open or shorted, HVAC Controls 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 197
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 06, 2023
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Code B1020 2017 Chevrolet Silverado Description

The Heating, Ventilation, and Air Conditioning (HVAC) module communicates with the HVAC controls via serial data. This Diagnostic Trouble Code (DTC) indicates a fault in the HVAC controls. The HVAC controls may continue to respond normally to faceplate functions when this DTC is set. The DTC will be set when the HVAC module receives an improper status response indicating an internal ECU fault in the HVAC controls.
OBDII Code B1020 2017 Chevrolet Silverado - Auxiliary Electronic Control Unit Performance - AutoCodes.com
B1020 2017 Chevrolet Silverado Code - Auxiliary Electronic Control Unit Performance

What are the Possible Causes of the DTC B1020 2017 Chevrolet Silverado?

  • Faulty Heating, Ventilation, and Air Conditioning (HVAC) Controls
  • HVAC Controls harness is open or shorted
  • HVAC Controls circuit poor electrical connection

How to Fix the DTC B1020 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1020 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 B1020 2017 Chevrolet Silverado code?

Need more information on how to fix the B1020 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1020 2017 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1020 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B1020 in a 2017 Chevrolet Silverado?

- Common symptoms include issues with auxiliary electronic control unit performance, such as erratic behavior of electronic components or malfunctions in auxiliary systems.

2. What could be causing the OBDII code B1020 in a 2017 Chevrolet Silverado?

- The code B1020 in a 2017 Chevrolet Silverado is typically triggered by faults in the auxiliary electronic control unit, wiring issues, or a malfunction in the auxiliary system components.

3. How can I diagnose the OBDII code B1020 in my 2017 Chevrolet Silverado?

- Diagnosing the OBDII code B1020 involves using an OBDII scanner to read the code, inspecting the auxiliary electronic control unit and related wiring for any visible damage, and testing the components of the auxiliary system.

4. What are some repair tips for fixing the OBDII code B1020 in a 2017 Chevrolet Silverado?

- Repair tips include checking and repairing any damaged wiring or connectors, replacing faulty components in the auxiliary system, and resetting the fault code with an OBDII scanner after completing repairs.

5. Can I continue driving my 2017 Chevrolet Silverado with the OBDII code B1020?

- It is not recommended to continue driving your vehicle with the OBDII code B1020, as it may lead to further malfunctions in the auxiliary system and potentially affect the overall performance and safety of the vehicle.

6. How much does it typically cost to repair the OBDII code B1020 in a 2017 Chevrolet Silverado?

- The cost of repairing the OBDII code B1020 can vary depending on the extent of the issue, the need for replacement parts, and labor costs. It is advisable to consult a professional mechanic for an accurate estimate.

7. Will resetting the OBDII code B1020 in my 2017 Chevrolet Silverado make it go away permanently?

- Resetting the OBDII code B1020 may clear the fault code temporarily, but if the underlying issue causing the code is not addressed and fixed, the code is likely to reappear.

8. Are there any common DIY solutions for resolving the OBDII code B1020 in a 2017 Chevrolet Silverado?

- While some simple checks like inspecting wiring connections can be done DIY, resolving the OBDII code B1020 often requires specialized diagnostic tools and expertise, so it is best to seek professional help.

9. Can extreme weather conditions cause the OBDII code B1020 in a 2017 Chevrolet Silverado?

- Extreme weather conditions can potentially affect the performance of electronic components and wiring in a vehicle, which may lead to issues triggering codes like B1020. It is essential to keep your vehicle well-maintained in all conditions.

10. How long does it usually take to repair the OBDII code B1020 in a 2017 Chevrolet Silverado?

- The repair time for the OBDII code B1020 can vary based on the specific cause of the issue, availability of parts, and the mechanic's workload. In general, it may take a few hours to a day to diagnose and fix the problem.

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