P0304 2019 Honda CR-V Code - No. 4 Cylinder Misfire Detected
Quick Answer
The crankshaft vibrates slightly when each cylinder fires. Common causes include Valve adjustment, Faulty spark plug #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 2019 Honda CR-V indicates No. 4 Cylinder Misfire Detected.
- Common causes
- Common causes include Valve adjustment, Faulty spark plug #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 2019 Honda CR-V Description
There are two types of misfire detection: Type 1: When the number of misfires per 200 engine revolutions reaches the level that can damage the three-way catalyst (TWC), a DTC is stored and the MIL blinks. Type 2: When the number of misfires per 1,000 engine revolutions reaches the level that affects exhaust emissions but is not severe enough to immediately damage the catalyst, a DTC is stored, and the MIL comes on.
What are the Possible Causes of the DTC P0304 2019 Honda CR-V?
- Valve adjustment
- Faulty spark plug #4
- Faulty ignition coil #4
- Clogged or faulty fuel injector #4
- Intake air leak
- Insufficient cylinder #4 compression
- Incorrect fuel pressure
How to Fix the DTC P0304 2019 Honda CR-V?
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0304 2019 Honda CR-V 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 2019 Honda CR-V code?
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Frequently Asked Questions about P0304 2019 Honda CR-V Code
1. What does the OBDII code P0304 mean on a 2019 Honda CR-V?
P0304 indicates that the engine control module (ECM) has detected a misfire in cylinder number 4.
2. What are the common symptoms of a P0304 code in a 2019 Honda CR-V?
Symptoms may include rough idling, reduced engine performance, poor fuel economy, hesitation during acceleration, and the Check Engine Light being illuminated.
3. What causes a P0304 code on the 2019 Honda CR-V?
Common causes include a faulty spark plug, bad ignition coil, clogged or leaking fuel injector, vacuum leak, low engine compression, or issues with the engine control module.
4. Can I drive my 2019 Honda CR-V with a P0304 code?
While the car may still be drivable, continued operation with a cylinder misfire can cause further engine damage, reduced performance, and increased emissions. It is best to address the issue promptly.
5. How do I fix a P0304 code on a 2019 Honda CR-V?
Repairs may involve replacing the spark plug or ignition coil for cylinder 4, cleaning or replacing the fuel injector, fixing vacuum leaks, or performing a compression test to address internal engine issues.
6. How can I diagnose the cause of a P0304 code on my CR-V?
Start by inspecting the spark plug and ignition coil for cylinder 4. If they appear fine, check the fuel injector, vacuum lines, and perform a compression test. A diagnostic scan tool can also provide live data to help pinpoint the issue.
7. How much does it cost to fix a P0304 code on a 2019 Honda CR-V?
Repair costs vary depending on the cause, ranging from $100–$300 for spark plug or ignition coil replacement to $500–$1,000 for more complex issues like fuel injector replacement or internal engine repairs.
8. Can a dirty air filter cause a P0304 code on a 2019 Honda CR-V?
While unlikely, a severely clogged air filter can affect engine performance and contribute to misfires. It’s a good idea to check the air filter as part of regular maintenance.
9. Will a P0304 code cause long-term damage to my 2019 Honda CR-V?
If left unresolved, a misfire can damage the catalytic converter, increase engine wear, and lead to more expensive repairs.
10. Do I need special tools to fix a P0304 code on my 2019 Honda CR-V?
Basic tools such as a spark plug socket and wrench may be sufficient for minor repairs. However, diagnosing and repairing more complex issues may require a diagnostic scan tool, compression tester, or fuel pressure gauge.
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