how to fix P0301 misfire code on Honda CR-V Fifth Generation (2017-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Locate the spark plug for cylinder 1 (usually the one closest to the front of the engine).
3. Using a spark plug socket, remove the spark plug.
4. Inspect the spark plug for signs of wear, carbon buildup, or damage.
5. If necessary, replace it with a new spark plug according to manufacturer specifications (typically NGK or Denso).
6. Torque the new spark plug to the manufacturer's specifications (usually around 13 lb-ft).

3. Test and Replace Ignition Coil

1. Disconnect the ignition coil connector from cylinder 1.
2. Remove the ignition coil using a socket set.
3. Swap the ignition coil with a known good coil from another cylinder.
4. Reconnect the ignition coil and check for misfire codes again.
5. If the misfire follows the ignition coil, replace it with a new one. Ensure correct torque when reinstalling (around 8 lb-ft).

4. Inspect and Clean Fuel Injector

1. Remove the fuel rail (if necessary) to access the fuel injector for cylinder 1.
2. Disconnect the fuel injector connector.
3. Remove the fuel injector using the appropriate tool (may require special injector puller).
4. Clean or replace the fuel injector if clogged or damaged.
5. Reinstall the injector and reconnect the fuel rail, ensuring a proper seal.

5. Conduct Compression Test

1. Remove the spark plug from cylinder 1.
2. Connect the compression tester to the spark plug hole.
3. Crank the engine for a few seconds and note the compression reading.
4. Compare the reading to the manufacturer's specifications (usually around 180 psi).
5. If compression is low, further inspection of valves, piston rings, or head gasket may be necessary.