P0304 2017 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 2017 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 2017 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0304 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?
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Need Help with the Code?
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Frequently Asked Questions about P0304 2017 Chevrolet Silverado Code
1. What does the OBDII code P0304 mean for a 2017 Chevrolet Silverado?
P0304 indicates that the engine control module (ECM) has detected a misfire in cylinder 4 of the engine.
2. What are the common symptoms of a P0304 code on a 2017 Chevrolet Silverado?
Symptoms include rough idling, reduced engine performance, poor fuel economy, hesitation during acceleration, and the check engine light turning on.
3. What are the common causes of a cylinder 4 misfire in a 2017 Chevrolet Silverado?
Common causes include a faulty spark plug, a damaged ignition coil, a clogged fuel injector, low cylinder compression, or a vacuum leak near cylinder 4.
4. Can I drive my 2017 Chevrolet Silverado with a P0304 code?
Driving with a P0304 code is not recommended, as it can lead to further engine damage, including damage to the catalytic converter or other internal components.
5. How can I troubleshoot a P0304 code on my 2017 Chevrolet Silverado?
Start by inspecting the spark plug and ignition coil for cylinder 4, checking for visible damage or wear. You can also test the fuel injector, check for vacuum leaks, and perform a compression test.
6. How much does it cost to fix a P0304 code on a 2017 Chevrolet Silverado?
Repair costs vary based on the issue. Replacing a spark plug or ignition coil may cost $100-$300, while fixing a fuel injector or addressing compression issues could cost $500 or more.
7. Can a dirty air filter cause a P0304 code in my 2017 Chevrolet Silverado?
While unlikely, a severely clogged air filter could contribute to misfires if it restricts airflow, but it’s not a primary cause of cylinder-specific misfires like P0304.
8. What tools are needed to diagnose a P0304 code on a 2017 Chevrolet Silverado?
You’ll need an OBDII scanner, a spark plug tester, a compression tester, and potentially tools to check the fuel injector or ignition coil.
9. Can bad fuel cause a P0304 code in a 2017 Chevrolet Silverado?
Yes, contaminated or low-quality fuel can lead to misfires by affecting fuel combustion, but it should be ruled out alongside other causes.
10. Will clearing the P0304 code fix the misfire in my 2017 Chevrolet Silverado?
Clearing the code will turn off the check engine light temporarily, but it won’t fix the underlying issue causing the misfire. Proper diagnosis and repair are needed.
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