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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal for safety.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench
• Remove the engine cover if necessary.
• Use the spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for signs of wear (e.g., carbon buildup, electrode wear).
• If damaged, replace it with a new spark plug, ensuring it is gapped according to manufacturer specifications.
• Torque the spark plug to the manufacturer’s specified value (typically around 13 lb-ft).

3. Test and Replace Ignition Coil

• Tools Required: Socket set, multimeter
• Disconnect the connector from the ignition coil on cylinder 1.
• Remove the ignition coil using a socket set.
• Test the ignition coil with a multimeter to ensure it is functioning correctly (check resistance values as per service manual).
• If faulty, replace the ignition coil with a new one.
• Reinstall the ignition coil and reconnect the connector.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, safety goggles
• Disconnect the fuel injector connector and remove the fuel injector from cylinder 1.
• Inspect the injector for clogs or damage.
• Clean the fuel injector using a fuel injector cleaner.
• If the injector is beyond cleaning, replace it with a new one.
• Reinstall the injector and reconnect the connector.

5. Perform Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine to obtain a compression reading.
• Compare the reading to the manufacturer’s specifications.
• If the compression is low, further diagnosis may be needed (e.g., valve issues, head gasket).

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any trouble codes.
• Start the engine and ensure the check engine light does not reappear.