how to fix P0301 code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, vacuum gauge.
• Gather necessary parts based on diagnostic findings.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Replace Spark Plug

• Step 1: Disconnect the negative battery terminal to ensure safety.
• Step 2: Remove the engine cover if applicable (use a socket set).
• Step 3: Disconnect the ignition coil connector and remove the ignition coil from cylinder 1.
• Step 4: Remove the old spark plug using a spark plug socket. Inspect for wear or fouling.
• Step 5: Install the new spark plug with a torque specification of 13 lb-ft (17 Nm).
• Step 6: Reinstall the ignition coil and connector.

3. Check/Replace Fuel Injector

• Step 1: Check the fuel injector resistance with a multimeter (specification: 12-16 ohms).
• Step 2: If faulty, remove the fuel injector by disconnecting the electrical connector and loosening the fuel rail bolts.
• Step 3: Replace with a new fuel injector, ensuring proper alignment and sealing.
• Step 4: Reconnect the fuel injector connector and reassemble the fuel rail.

4. Compression Test

• Step 1: Remove the spark plug from cylinder 1.
• Step 2: Insert the compression tester into the spark plug hole.
• Step 3: Crank the engine for a few seconds and record the reading (specification: approx. 180 psi).
• Step 4: If the compression is low, inspect for potential internal engine issues.

5. Clear Codes and Test Drive

• Step 1: Reconnect the negative battery terminal.
• Step 2: Use the OBD-II scanner to clear the P0301 code.
• Step 3: Test drive the vehicle to monitor for any reoccurrence of the check engine light and ensure normal operation.