how to diagnose Honda Pilot Third Generation (2016-present) with P0301 code

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on the ignition and fuel systems.

2. Inspect and Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Locate cylinder 1 ignition coil and disconnect the electrical connector.
3. Remove the ignition coil using a socket.
4. Remove the spark plug using a spark plug socket.
5. Inspect the spark plug for wear, carbon buildup, or damage; replace if necessary.
6. Install a new spark plug, tightening it to the manufacturer's specified torque (typically around 13-15 ft-lbs).

3. Inspect and Replace Ignition Coil

1. If the spark plug is in good condition, visually inspect the ignition coil for cracks or carbon tracking.
2. Replace the ignition coil if it appears damaged.
3. Reinstall the ignition coil and reconnect the electrical connector.

4. Test Fuel Injector

1. Remove the fuel injector connector for cylinder 1.
2. Use a noid light to check for injector pulse. If no pulse is detected, check the wiring and ECM.
3. If pulse is present but no fuel is delivered, replace the fuel injector.

5. Compression Test

1. Remove the spark plug from cylinder 1.
2. Attach a compression gauge and crank the engine to obtain a reading.
3. Compare the compression reading to specifications; if low, further diagnostics on valve or piston issues may be required.

6. Reassemble and Reconnect Battery

• Reattach any components removed during the inspection and repair.
• Reconnect the battery and ensure all connections are secure.