Engine-CodesChevrolet – B356A 2017 Chevrolet Silverado

B356A 2017 Chevrolet Silverado Code - Vehicle Direction Warning Switch Circuit

Quick Answer

The B356A diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado relates to the Vehicle Direction Warning Switch Circuit. Common causes include Faulty direction warning switch, Damaged wiring or connectors in the circuit, Blown fuse related to the signaling system. 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
B356A 2017 Chevrolet Silverado indicates Vehicle Direction Warning Switch Circuit.
Common causes
Common causes include Faulty direction warning switch, Damaged wiring or connectors in the circuit, Blown fuse related to the signaling system.
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.
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code B356A 2017 Chevrolet Silverado Description

The B356A diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado relates to the Vehicle Direction Warning Switch Circuit. This code indicates a problem with the circuit that controls the vehicle's direction warning switch, which is responsible for activating the turn signals and hazard lights. When this circuit malfunctions, it can lead to issues with the vehicle's signaling system, affecting the driver's ability to indicate their intentions to other road users.

OBDII Code B356A 2017 Chevrolet Silverado - Vehicle Direction Warning Switch Circuit
B356A 2017 Chevrolet Silverado Code - Vehicle Direction Warning Switch Circuit

Common Causes of B356A 2017 Chevrolet Silverado

  1. Faulty direction warning switch
  2. Damaged wiring or connectors in the circuit
  3. Blown fuse related to the signaling system
  4. Malfunctioning relay that controls the turn signals and hazards
  5. Issues with the body control module (BCM) responsible for managing the signaling system

Symptoms of B356A 2017 Chevrolet Silverado

  1. Turn signals not working properly or intermittently
  2. Hazard lights failing to activate
  3. Dashboard indicator lights for turn signals or hazards staying on or flashing incorrectly
  4. Loss of audible clicking sound when using turn signals
  5. Vehicle direction warning switch not responding to input

How to Fix B356A 2017 Chevrolet Silverado

  1. Diagnose the specific cause of the issue by using a diagnostic scanner to read the DTC and perform electrical testing on the direction warning switch circuit.
  2. Inspect the direction warning switch, wiring, connectors, fuses, and relays for any visible damage or signs of wear.
  3. Replace any faulty components, such as the direction warning switch, damaged wiring, blown fuses, or malfunctioning relays.
  4. Clear the DTC from the vehicle's computer system using the diagnostic scanner to reset the signaling system.
  5. Test the repaired direction warning switch circuit to ensure that the turn signals and hazard lights are functioning correctly.

Cost to Fix B356A 2017 Chevrolet Silverado

The typical repair costs for addressing the B356A DTC on a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair for this type of problem can range from $100 to $300, including parts and labor. However, it's important to note that the actual cost may be higher or lower based on factors such as the location of the repair shop, the vehicle's make and model, and the extent of the repairs needed. Additionally, diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. It's recommended to consult with a qualified mechanic or repair shop to obtain a more accurate estimate for addressing this issue.

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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 B356A 2017 Chevrolet Silverado Code

1. What does the OBDII code B356A mean in a 2017 Chevrolet Silverado?

The code B356A indicates an issue with the Vehicle Direction Warning Switch Circuit, which is related to the lane departure or blind spot monitoring system.

2. What are the symptoms of a B356A code in a 2017 Chevrolet Silverado?

Common symptoms include malfunctioning lane departure warning, blind spot monitoring system errors, or warning lights illuminated on the dashboard.

3. What causes the B356A code in a Chevrolet Silverado?

This code can be caused by a faulty direction warning switch, damaged wiring or connectors in the circuit, or a malfunctioning control module.

4. How can I diagnose a B356A code in my 2017 Silverado?

Use a diagnostic scanner to confirm the code, then inspect the wiring, connectors, and the warning switch for visible damage or wear. Testing the circuit with a multimeter may also be necessary.

5. Can a blown fuse trigger the B356A code?

Yes, a blown fuse in the circuit associated with the direction warning switch can cause this code to appear.

6. Is it safe to drive with a B356A code in my Chevrolet Silverado?

While the vehicle may still be drivable, the safety systems like lane departure warning or blind spot monitoring may not function properly, increasing the risk of accidents.

7. How do I fix the B356A code in a 2017 Chevrolet Silverado?

Repairs may include replacing the faulty direction warning switch, repairing damaged wiring, or addressing any issues with the associated control module.

8. How much does it cost to repair a B356A code in a Chevrolet Silverado?

Repair costs can vary but typically range from $100 to $300, depending on whether the issue is with the switch, wiring, or control module.

9. Can I clear the B356A code without fixing the problem?

Clearing the code without addressing the underlying issue may temporarily turn off the warning light, but the code will likely return as the problem persists.

10. Do I need a professional mechanic to fix the B356A code?

If you're comfortable with basic electrical diagnostics and repairs, you may be able to fix it yourself. However, a professional mechanic is recommended for more complex issues or module-related repairs.

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