B356A 2016 GMC Sierra Code - Vehicle Direction Warning Switch Circuit
Quick Answer
The lane departure warning system is controlled by the Active Safety Control Module. Common causes include Faulty Vehicle Direction Warning Switch, Vehicle Direction Warning Switch harness is open or shorted, Vehicle Direction Warning Switch 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
- B356A 2016 GMC Sierra indicates Vehicle Direction Warning Switch Circuit.
- Common causes
- Common causes include Faulty Vehicle Direction Warning Switch, Vehicle Direction Warning Switch harness is open or shorted, Vehicle Direction Warning Switch 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 B356A 2016 GMC Sierra Description
When the Frontview Camera module is operating and can detect the lane markings, the Frontview Camera module will request via serial data communications that the instrument panel cluster illuminate the green lane departure ready–to–assist indicator. If the Frontview Camera module detects that the vehicle has crossed a lane marking without the turn signal being used, the module will request that the instrument cluster flash the yellow lane departure warning indicator. An audible warning may also sound three times, or the haptic seat (if equipped) may pulse when the yellow Instrument Cluster indicator is flashing. The driver can select between audible or haptic alerts in the vehicle personalization menu. The Diagnostic Trouble Code (DTC) will be set when the Active Safety Control Module has detected a short to ground, short to voltage, or an open/high resistance for more than 10 s.
What are the Possible Causes of the DTC B356A 2016 GMC Sierra?
- Faulty Vehicle Direction Warning Switch
- Vehicle Direction Warning Switch harness is open or shorted
- Vehicle Direction Warning Switch circuit poor electrical connection
- Faulty Frontview Camera Module
- Faulty Active Safety Control Module
How to Fix the DTC B356A 2016 GMC Sierra?
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 B356A 2016 GMC Sierra 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.
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Frequently Asked Questions about B356A 2016 GMC Sierra Code
What does OBDII code B356A mean in a 2016 GMC Sierra?
It indicates an issue with the Vehicle Direction Warning Switch Circuit, which is part of the system responsible for directional warnings like lane departure or collision alerts.
What are common symptoms of code B356A in a 2016 GMC Sierra?
Symptoms may include malfunctioning directional warning lights, failure of lane departure or collision warning systems, and related dashboard warning messages.
What causes code B356A in a 2016 GMC Sierra?
This code can be caused by a faulty vehicle direction warning switch, damaged wiring or connectors, or issues with the associated control module.
How do I diagnose code B356A on a 2016 GMC Sierra?
Use an OBDII scanner to confirm the code, then inspect the warning switch, wiring, and connectors for damage, corrosion, or loose connections.
Can I drive my 2016 GMC Sierra with code B356A active?
While the vehicle may still be drivable, safety features like lane departure warnings or collision alerts may not function properly, increasing the risk of accidents.
How do you fix code B356A in a 2016 GMC Sierra?
Repairs typically involve replacing a faulty warning switch, repairing damaged wiring, or reprogramming the control module if necessary.
How much does it cost to fix code B356A in a 2016 GMC Sierra?
Costs can vary, but replacing the vehicle direction warning switch may range from $100 to $300, depending on labor and parts.
Can a faulty warning switch trigger code B356A?
Yes, a defective vehicle direction warning switch is a common cause of this code.
Do I need special tools to fix code B356A on a 2016 GMC Sierra?
Basic tools like a multimeter and OBDII scanner are usually sufficient for diagnosing and repairing this code.
Is code B356A specific to the GMC Sierra?
No, this code can appear on other GM vehicles with similar vehicle direction warning systems, although specifics may vary.
Discuss the causes and fixes for B356A 2016 GMC Sierra OBDII Code
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