P0304 2014 Chevrolet Silverado Code - Cylinder 4 Misfire Detected
Quick Answer
A misfiring cylinder causes slight variations in the rotational speed of the crankshaft. Common causes include Faulty Spark Plug #4, Clogged or faulty Fuel Injector #4, Faulty Ignition Coil #4. 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
- P0304 2014 Chevrolet Silverado indicates Cylinder 4 Misfire Detected.
- Common causes
- Common causes include Faulty Spark Plug #4, Clogged or faulty Fuel Injector #4, Faulty Ignition Coil #4.
- 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 P0304 2014 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0304 2014 Chevrolet Silverado?
- Faulty Spark Plug #4
- Clogged or faulty Fuel Injector #4
- Faulty Ignition Coil #4
- Fuel Injector #4 harness is open or shorted
- Fuel Injector #4 circuit poor electrical connection
- Ignition Coil #4 harness is open or shorted
- Ignition Coil #4 circuit poor electrical connection
- Insufficient cylinder 4 compression
- Incorrect fuel pressure
- Intake air leak
How to Fix the DTC P0304 2014 Chevrolet Silverado?
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.
Code Tech Notes
There is a Factory Service Bulletins for All 2000-2020 Chevrolet Models:
2000-2020 Chevrolet Factory Service Bulletin OBDII Code P0304
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0304 2014 Chevrolet Silverado 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.
Need more information about the P0304 2014 Chevrolet Silverado code?
Need more information on how to fix the P0304 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0304 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0304 2014 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P0304 (Cylinder 4 Misfire Detected) in a 2014 Chevrolet Silverado?
The common symptoms include rough idling, loss of power, engine misfiring, and increased fuel consumption.
2. What are the possible causes of a cylinder 4 misfire in a 2014 Chevrolet Silverado?
The common causes of cylinder 4 misfire can include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, or low compression in the cylinder.
3. How can I diagnose the specific cause of the cylinder 4 misfire in my 2014 Chevrolet Silverado?
Diagnosing the issue may involve conducting a thorough inspection of spark plugs, ignition coils, fuel injectors, and performing a compression test to pinpoint the exact cause of the misfire.
4. Can driving with a cylinder 4 misfire damage the engine of my 2014 Chevrolet Silverado?
Continued driving with a cylinder 4 misfire can lead to potential damage to the catalytic converter, oxygen sensor, or other engine components due to unburned fuel entering the exhaust system.
5. How can I repair a cylinder 4 misfire in my 2014 Chevrolet Silverado?
Repairing a cylinder 4 misfire typically involves replacing faulty spark plugs, ignition coils, fuel injectors, or addressing any vacuum leaks or compression issues in the cylinder.
6. Is it safe to continue driving my 2014 Chevrolet Silverado with OBDII code P0304 (Cylinder 4 Misfire Detected)?
It is not recommended to drive your vehicle with a cylinder 4 misfire as it can lead to further damage and potentially unsafe driving conditions.
7. How much does it cost to fix a cylinder 4 misfire in a 2014 Chevrolet Silverado?
The cost of fixing a cylinder 4 misfire can vary depending on the exact cause of the issue and the labor rates of the repair shop, but it typically ranges from a few hundred to a thousand dollars.
8. Can a cylinder 4 misfire be triggered by a simple issue like a loose gas cap in a 2014 Chevrolet Silverado?
While a loose gas cap is unlikely to directly cause a cylinder 4 misfire, it is still important to address such issues as they can trigger other warning lights and affect the overall performance of the vehicle.
9. Will resetting the OBDII code P0304 in my 2014 Chevrolet Silverado make the misfire disappear?
Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the cylinder 4 misfire is not addressed, the problem is likely to persist and trigger the code again.
10. How often should I perform maintenance to prevent cylinder misfires in my 2014 Chevrolet Silverado?
Regular maintenance, including changing spark plugs, inspecting ignition components, and ensuring proper fuel system function, can help prevent cylinder misfires and other related issues in your vehicle.
Discuss the causes and fixes for P0304 2014 Chevrolet Silverado OBDII Code
Code P0304 2014 Chevrolet Silverado 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.
