my Honda CR-V Sixth Generation (2023-present) has a P0301 misfire code, how do I fix it?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the engine is cool and disconnect the negative battery terminal to prevent any electrical shorts.

2. Replace Spark Plug

1. Remove the engine cover if applicable.
2. Use a socket wrench to remove the ignition coil from cylinder 1.
3. Unscrew and remove the spark plug using a spark plug socket.
4. Inspect the old spark plug for signs of wear or fouling.
5. Install a new spark plug, ensuring it is gapped to manufacturer specifications (check owner’s manual for exact gap).
6. Reinstall the ignition coil and secure it with bolts.

3. Inspect and Replace Ignition Coil

1. If the spark plug replacement does not resolve the issue, remove the ignition coil from cylinder 1.
2. Test the coil using a multimeter to ensure it is within specifications (refer to the service manual for specific resistance values).
3. If faulty, replace the ignition coil with a new unit.
4. Reinstall the coil and reconnect the wiring harness.

4. Check Fuel Injector

1. Disconnect the fuel injector connector for cylinder 1.
2. Test the injector with a multimeter to ensure it is receiving the appropriate voltage.
3. If it is not functioning, replace the fuel injector.
4. Reconnect the fuel injector connector.

5. Compression Test

1. Remove the spark plug from cylinder 1 again.
2. Insert a compression gauge into the spark plug hole.
3. Crank the engine and record the pressure reading.
4. Compare the reading with manufacturer specifications (check service manual).
5. If compression is low, further investigation into piston rings or valves may be necessary.