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

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, compression tester, socket set, torque wrench, fuel injector cleaner.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Remove the ignition coil and spark plug from cylinder 1.
• Inspect the old spark plug for signs of wear or fouling.
• Install a new spark plug (gapping it to manufacturer specifications, typically 0.043 inches for Honda).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Test and Replace Ignition Coil

• If the spark plug replacement does not resolve the issue, test the ignition coil using a multimeter.
• If the resistance is outside of manufacturer specifications, replace the ignition coil for cylinder 1.
• Reinstall the ignition coil and ensure all connections are secure.

4. Inspect and Clean Fuel Injector

• Remove the fuel injector from cylinder 1.
• Use a fuel injector cleaner to clean the injector or replace it if cleaning does not improve performance.
• Reinstall the injector ensuring proper seating and connection.

5. Check Compression

• Insert a compression tester into the spark plug hole of cylinder 1.
• Crank the engine and record the compression reading; it should meet the manufacturer’s specifications (usually around 180 psi).
• If the compression is low, further diagnosis of the internal engine components may be required (e.g., piston rings, valves).