how to fix Honda Pilot Third Generation (2016-present) that keeps throwing P0301 code?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

Tools Required:

• OBD-II scanner
• Multimeter
• Compression tester
• Socket set
• Torque wrench

2. Replace Spark Plug

1. Locate cylinder 1 spark plug (usually the front left on a V6 engine).
2. Remove the ignition coil by unscrewing the retaining bolts and disconnecting the electrical connector.
3. Use a spark plug socket to remove the spark plug from cylinder 1.
4. Inspect the old spark plug; replace it with a new spark plug if it shows signs of wear or fouling.
5. Torque the new spark plug to manufacturer specifications (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

1. Check the ignition coil resistance using a multimeter; refer to the repair manual for the correct resistance values.
2. If the ignition coil is faulty, remove it and replace it with a new one.
3. Reconnect the ignition coil and securely fasten it in place.

4. Fuel Injector Cleaning/Replacement

1. If the injector is suspected to be clogged, try cleaning it with a fuel injector cleaning kit.
2. If cleaning does not resolve the issue, remove the fuel injector from cylinder 1.
3. Replace the injector with a new one if it is found to be faulty or clogged beyond cleaning.

5. Compression Test

1. Remove the spark plug from cylinder 1.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine and record the compression reading. It should be within the manufacturer’s specifications (typically around 180-200 PSI for most Honda engines).
4. If the compression is low, further investigation into engine internals may be necessary.