how to fix P0302 code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Remove the engine cover (if applicable).
• Use a socket wrench to remove the spark plug from cylinder 2.
• Inspect the old spark plug for signs of wear or fouling.
• Install a new spark plug, ensuring it is gapped correctly (typically 0.044 inches for Honda).
• Torque the spark plug to the manufacturer’s specification (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil in cylinder 2.
• Remove the mounting bolts and take off the ignition coil.
• Test the ignition coil with a multimeter to ensure it is within specifications.
• If faulty, replace it with a new ignition coil and secure it in place.

4. Clean or Replace Fuel Injector

• Remove the fuel rail (if necessary) to access the fuel injector in cylinder 2.
• Disconnect the fuel injector's electrical connector and fuel line (be cautious of fuel spillage).
• Use a fuel injector cleaner to clean the injector, or replace it if it is found to be defective.
• Reassemble the fuel rail and reconnect all lines.

5. Perform Compression Test

• Remove the spark plug from cylinder 2 and install the compression tester.
• Crank the engine several times and record the compression reading.
• Compare the reading to the manufacturer’s specifications (typically around 180-200 psi).
• If the compression is low, further investigation into engine internals may be required.