P0304 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 Honda CR-V code?
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Frequently Asked Questions about P0304 2016 Honda CR-V Code
1. What does OBDII code P0304 mean on a 2016 Honda CR-V?
P0304 indicates a misfire has been detected in cylinder No. 4 of the engine.
2. What are the common symptoms of a P0304 code in a 2016 Honda CR-V?
Symptoms may include rough idling, reduced engine performance, poor fuel economy, and the Check Engine Light turning on.
3. What causes a P0304 code in a 2016 Honda CR-V?
Common causes include a faulty spark plug, a bad ignition coil, a clogged fuel injector, low engine compression, or a vacuum leak affecting cylinder No. 4.
4. Can a bad spark plug cause the P0304 code in my 2016 Honda CR-V?
Yes, a worn or fouled spark plug in cylinder No. 4 is one of the most common reasons for this code.
5. How can I fix a P0304 code on a 2016 Honda CR-V?
Start by inspecting and replacing the spark plug and ignition coil in cylinder No. 4. If the problem persists, check the fuel injector, compression, and for vacuum leaks.
6. Is it safe to drive a 2016 Honda CR-V with a P0304 code?
Driving with a P0304 code can damage the engine or catalytic converter if not addressed promptly. It’s best to fix the issue as soon as possible.
7. How do I diagnose the P0304 code on my 2016 Honda CR-V?
Use an OBDII scanner to confirm the code, then inspect the spark plug, ignition coil, and fuel injector in cylinder No. 4. A compression test or smoke test may also be needed.
8. Can low fuel pressure cause a P0304 code in a 2016 Honda CR-V?
Yes, low fuel pressure or a clogged fuel injector can prevent proper combustion in cylinder No. 4, triggering the code.
9. How much does it cost to fix a P0304 code on a 2016 Honda CR-V?
The cost varies depending on the issue. Replacing a spark plug or ignition coil may cost $100–$300, while more complex repairs like fixing compression issues can cost significantly more.
10. Can a dirty air filter cause a P0304 code in my 2016 Honda CR-V?
While unlikely, a severely clogged air filter can affect overall engine performance and contribute to misfires, including in cylinder No. 4.
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