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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

1. Remove the engine cover if necessary.
2. Use a socket wrench to remove the spark plug from cylinder 1.
   • Tools required: Socket set (10mm and 16mm), torque wrench.
3. Inspect the old spark plug for signs of wear (e.g., fouling, excessive gap).
4. Install a new spark plug, ensuring it is gapped according to manufacturer specifications (typically around 0.044 inches).
5. Torque the spark plug to the manufacturer’s specification (usually 13 lb-ft).

3. Inspect and Replace Ignition Coil

1. Disconnect the wiring harness from the ignition coil for cylinder 1.
2. Remove the ignition coil by unscrewing the mounting bolts.
   • Tools required: Socket set.
3. Inspect the ignition coil for any visible damage or corrosion.
4. Install a new ignition coil, ensuring it is securely fastened and the connector is properly attached.

4. Check and Clean Fuel Injector

1. Remove the fuel rail assembly if necessary to access the fuel injector for cylinder 1.
2. Disconnect the fuel injector wiring harness.
3. Inspect the fuel injector for clogs or damage.
4. If necessary, clean the fuel injector using a specialized cleaner or replace it with a new one.
5. Reassemble the fuel rail and reconnect all connections.

5. Compression Test

1. Remove the spark plug from cylinder 1.
2. Insert a compression gauge into the spark plug hole.
3. Crank the engine several times to obtain a reading.
4. Compare the reading to the manufacturer’s specifications (typically 180-210 psi).
5. If compression is low, further investigation into valves, piston rings, or head gasket may be required.