P0302 2016 GMC Sierra Code - Cylinder 2 Misfire Detected
Quick Answer
The P0302 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that a misfire has been detected in cylinder 2 of the engine. Common causes include Faulty ignition coil, Worn or fouled spark plug, Clogged or malfunctioning fuel injector. 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
- P0302 2016 GMC Sierra indicates Cylinder 2 Misfire Detected.
- Common causes
- Common causes include Faulty ignition coil, Worn or fouled spark plug, Clogged or malfunctioning fuel injector.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0302 2016 GMC Sierra Description
The P0302 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that a misfire has been detected in cylinder 2 of the engine. A misfire occurs when there is a lack of combustion in the cylinder, leading to a loss of power, rough idle, and potential damage to the engine if left unresolved. In this specific case, cylinder 2 is not firing properly, which can result in decreased performance, reduced fuel efficiency, and increased emissions.
Common Causes of P0302 2016 GMC Sierra
- Faulty ignition coil
- Worn or fouled spark plug
- Clogged or malfunctioning fuel injector
- Vacuum leak
- Low compression in cylinder 2
Symptoms of P0302 2016 GMC Sierra
- Check engine light is illuminated
- Engine misfires or runs rough
- Decreased fuel efficiency
- Engine vibration or shaking
- Lack of power or acceleration
How to Fix P0302 2016 GMC Sierra
- Diagnose the specific cause of the misfire by performing a cylinder compression test, checking the ignition coil, spark plug, and fuel injector for proper function.
- Replace the faulty component, whether it be the ignition coil, spark plug, fuel injector, or addressing a vacuum leak.
- Clear the trouble code and reset the vehicle's computer to see if the code returns.
- Test drive the vehicle to ensure the misfire has been resolved and that the engine is running smoothly.
- If the issue persists, further diagnostics may be necessary to identify any underlying issues with the engine.
Cost to Fix P0302 2016 GMC Sierra
The cost of repairing a cylinder 2 misfire in a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty ignition coil, spark plug, or fuel injector can range from $100 to $300 per component, not including labor costs. Labor rates at auto repair shops typically range from $80 to $150 per hour. Additional diagnostic time may also be required, which can add to the overall cost of the repair. It's recommended to consult with a trusted mechanic or dealership for a more accurate estimate based on the specific circumstances of the vehicle.
Tech Notes for P0302 2016 GMC Sierra
There is a Factory Service Bulletins for All 2000-2020 Chevrolet Models:
2000-2020 Chevrolet Factory Service Bulletin OBDII Code P0302
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.
Need more information about the P0302 2016 GMC Sierra code?
Need more information on how to fix the P0302 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0302 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0302 2016 GMC Sierra Code
What does OBD-II code P0302 mean on a 2016 GMC Sierra?
P0302 indicates a misfire has been detected in cylinder 2 of the engine.
What are the symptoms of a P0302 code?
Symptoms may include rough idling, reduced engine power, poor fuel economy, and the check engine light turning on.
What causes a P0302 code on a 2016 GMC Sierra?
Common causes include a faulty spark plug, a bad ignition coil, a clogged fuel injector, low compression in cylinder 2, or vacuum leaks near the cylinder.
Can I drive my 2016 GMC Sierra with a P0302 code?
Driving with a P0302 code is not recommended as the misfire can damage the engine or catalytic converter over time.
How do I fix a P0302 code on a 2016 GMC Sierra?
Repairs may include replacing the spark plug or ignition coil in cylinder 2, cleaning or replacing the fuel injector, checking for vacuum leaks, or performing a compression test.
How can I diagnose the cause of a P0302 code?
Start by inspecting the spark plug, ignition coil, and wiring for cylinder 2. Check the fuel injector, look for vacuum leaks, and perform a compression test if needed.
Will clearing the code fix the issue?
Clearing the code will turn off the check engine light temporarily, but the underlying issue causing the misfire will need to be resolved to prevent the code from returning.
What is the cost to repair a P0302 code?
Repair costs can vary depending on the cause, ranging from $100 for spark plug replacement to several hundred dollars for fuel injector or compression-related repairs.
Can a dirty air filter cause a P0302 code?
While uncommon, a dirty air filter can restrict airflow, potentially contributing to a misfire if cylinder 2 isn't receiving enough air.
How can I prevent a P0302 code on my GMC Sierra?
Regular maintenance like replacing spark plugs, cleaning fuel injectors, checking ignition components, and ensuring proper air and fuel mixture can help prevent misfires.
Discuss the causes and fixes for P0302 2016 GMC Sierra OBDII Code
Code P0302 2016 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.