B356A 2018 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 GMC Sierra Code
1. What does OBDII code B356A for a 2018 GMC Sierra mean?
The B356A code indicates a problem with the Vehicle Direction Warning Switch Circuit in your GMC Sierra.
2. What are the common symptoms of OBDII code B356A in a 2018 GMC Sierra?
Common symptoms of code B356A may include malfunctioning turn signals, hazards, or other directional indicators in the vehicle.
3. What are the potential causes of OBDII code B356A on a 2018 GMC Sierra?
Possible causes of the B356A code include a faulty direction warning switch, damaged wiring or connectors in the circuit, or a defective control module.
4. How can I diagnose the Vehicle Direction Warning Switch Circuit issue causing code B356A in my 2018 GMC Sierra?
To diagnose the problem, you may need to inspect the direction warning switch, check the wiring and connectors for damage, and use a diagnostic tool to identify the specific issue.
5. Can I still drive my 2018 GMC Sierra with OBDII code B356A present?
It is not recommended to continue driving your GMC Sierra with an unresolved B356A code, as it may affect the proper functioning of your vehicle's directional signals.
6. How can I repair the Vehicle Direction Warning Switch Circuit problem associated with code B356A in my 2018 GMC Sierra?
Repairing the issue may involve replacing the faulty direction warning switch, repairing damaged wiring or connectors, or reprogramming the control module, depending on the exact cause.
7. Is it safe to reset the B356A code in a 2018 GMC Sierra without fixing the underlying issue?
Resetting the B356A code without addressing the root cause can lead to the problem recurring and potentially affecting the safety and functionality of your vehicle's directional indicators.
8. Are there any DIY tips for troubleshooting the B356A code in a 2018 GMC Sierra?
While basic inspections like checking fuses and visible wiring connections can be done DIY, diagnosing and repairing the specific cause of the B356A code may require professional expertise.
9. How much does it typically cost to repair the Vehicle Direction Warning Switch Circuit problem triggering code B356A in a 2018 GMC Sierra?
Repair costs for the B356A code can vary depending on the specific issue, parts needed, and labor rates, so it's advisable to consult a mechanic for an accurate estimate.
10. Can a malfunctioning Vehicle Direction Warning Switch Circuit impact other systems in a 2018 GMC Sierra?
Yes, since the direction warning switch is integral to the vehicle's safety systems, a malfunction can potentially affect other electronic systems or safety features in the GMC Sierra.
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