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

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolt and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket. Inspect for signs of wear, fouling, or damage.
• If replacement is needed, install a new spark plug to the manufacturer's specified gap (usually around 0.043 inches for Honda).
• Torque the spark plug to the manufacturer's specifications (typically around 13 lb-ft). Apply dielectric grease to the spark plug boot before reinstallation.

3. Inspect and Replace Ignition Coil (if necessary)

• If the spark plug is in good condition, inspect the ignition coil for cracks or damage.
• If replacement is required, remove the ignition coil and replace it with a new one.
• Reconnect the electrical connector and ensure it is seated properly.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, fuel line disconnect tool (if necessary).
• For cleaning, use a fuel injector cleaner in the fuel system as per the product instructions. If you suspect a faulty injector, remove it and clean it with appropriate cleaning solutions or replace it entirely.

5. Verify Compression

• Tools Required: Compression gauge.
• Conduct a compression test on cylinder 1. If the compression is below the manufacturer's specifications, further investigation into potential internal engine issues (such as a blown head gasket or valve problems) may be required.