my Honda Civic 10th Generation (2016-2021) keeps throwing a P0302 code, what does that mean?

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, compression tester, fuel injector cleaner, and cleaning supplies.
• Safety: Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Remove the ignition coil and spark plug for cylinder 2 using a socket set.
• Inspect the spark plug for signs of wear or fouling; replace if necessary.
• Reinstall the new or cleaned spark plug and torque to manufacturer specifications (typically 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

• Remove the ignition coil for cylinder 2.
• Inspect for cracks or damage; replace if faulty.
• Install the new ignition coil and torque to manufacturer specifications (typically 7-9 lb-ft).

4. Check and Clean Fuel Injector

• Remove the fuel injector for cylinder 2.
• Inspect for clogs or leaks; use a fuel injector cleaner to flush if needed.
• Reinstall the injector ensuring proper seating and secure connections.

5. Compression Test

• Attach the compression tester to cylinder 2.
• Crank the engine and record the compression reading; it should be within manufacturer specifications (typically 180-200 psi).
• If low, further investigation into engine internals may be necessary.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0302 code from the ECU.
• Start the engine and perform a test drive to ensure the issue is resolved.