how to fix P0301 code on Honda Accord Eleventh Generation (2023-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to avoid electrical shorts.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1 by unbolting it and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or damage. Replace it if necessary.
• Install the new spark plug, ensuring it’s torqued to the manufacturer’s specifications (typically around 13 lb-ft).
• Reattach the ignition coil and reconnect the electrical connector.

3. Test and Replace Ignition Coil (if necessary)

• Tools Required: Multimeter, socket set.
• Use a multimeter to test the primary and secondary resistance of the ignition coil.
• If the readings are outside the manufacturer’s specifications, replace the ignition coil with a new one.
• Reinstall the ignition coil and reconnect the connector.

4. Check Fuel Injector

• Tools Required: Noid light or stethoscope.
• Connect a noid light to the fuel injector connector to check for signal.
• If no signal is detected, further inspect the wiring and ECM signal.
• If the injector is faulty, remove and replace it with a new one.

5. Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug and install the compression gauge in cylinder 1.
• Crank the engine and record the reading. Compare it to the manufacturer’s specifications.
• If the compression is low, further investigation into engine internals may be necessary.