how to fix P0301 code in Honda Pilot YF4 (2023-Present)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1 using a socket set (typically 10mm).
• Inspect the spark plug for wear, carbon buildup, or damage. Replace if necessary.
  • Torque the new spark plug to manufacturer specifications (usually around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Fuel Injector

• If the spark plug is in good condition, proceed to check the fuel injector.
• Remove the fuel rail to access the injector (follow manufacturer guidelines for fuel line depressurization).
• Inspect the injector for clogs or leaks, and test operation with a noid light.
• Replace the fuel injector if it fails the test. Ensure all O-rings are properly seated before reinstallation.

4. Compression Test

• If misfire persists, conduct a compression test on cylinder 1.
• Remove the spark plug and insert the compression gauge.
• Crank the engine and record the compression reading; it should be within the specifications (consult service manual).
• If compression is low, check for valve issues or head gasket failure.

5. Reassemble and Test

• Reinstall all components removed during the repair.
• Reconnect the negative battery terminal.
• Start the engine and ensure the check engine light is off.