P0306 2016 GMC Sierra Code - Cylinder 6 Misfire Detected
Quick Answer
The diagnostic trouble code P0306 for a 2016 GMC Sierra indicates that a misfire has been detected in cylinder 6 of the engine. Common causes include Faulty spark plugs or ignition coils, Clogged fuel injector, Vacuum leak. 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
- P0306 2016 GMC Sierra indicates Cylinder 6 Misfire Detected.
- Common causes
- Common causes include Faulty spark plugs or ignition coils, Clogged fuel injector, Vacuum leak.
- 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.
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Code P0306 2016 GMC Sierra Description
The diagnostic trouble code P0306 for a 2016 GMC Sierra indicates that a misfire has been detected in cylinder 6 of the engine. A misfire occurs when the fuel-air mixture in the cylinder fails to ignite at the proper time, causing a disruption in the combustion process. This can lead to a loss of power, rough idling, decreased fuel efficiency, and potentially even engine damage if left unresolved.
Common Causes of P0306 2016 GMC Sierra
- Faulty spark plugs or ignition coils
- Clogged fuel injector
- Vacuum leak
- Low compression in cylinder 6
- Issues with the engine control module
Symptoms of P0306 2016 GMC Sierra
- Loss of power during acceleration
- Rough idling or shaking while the engine is running
- Decreased fuel efficiency
- Engine stalling
- Check Engine Light illuminated
How to Fix P0306 2016 GMC Sierra
- Diagnose the specific cause of the misfire by performing a thorough inspection of the spark plugs, ignition coils, fuel injector, and vacuum lines.
- Replace any faulty spark plugs or ignition coils in cylinder 6.
- Clean or replace the clogged fuel injector if necessary.
- Repair any vacuum leaks in the system.
- Perform a compression test to check for low compression in cylinder 6 and address any issues found.
Cost to Fix P0306 2016 GMC Sierra
The typical repair costs for addressing a cylinder 6 misfire in a 2016 GMC Sierra can range from $100 to $500, depending on the specific cause of the misfire and the parts needed for the repair. This estimate includes parts and labor, but actual costs may vary based on the location, vehicle make and model, and the rates charged by the auto repair shop. It is recommended to obtain quotes from multiple shops to compare prices and ensure a fair cost for the repair.
Tech Notes for P0306 2016 GMC Sierra
There is a Factory Service Bulletins for All 2000-2020 Chevrolet Models:
2000-2020 Chevrolet Factory Service Bulletin OBDII Code P0306
This Factory Service Bulletin explains how this condition may be caused by significant carbon build-up on the intake and/or exhaust valves due to fuel contamination or incomplete burning of the fuel.
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