how to fix a P0303 misfire code in Honda CR-V Sixth Generation (2023-present)

Solution

1. Preparation

• Gather tools and parts needed.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool.
• Remove the engine cover if necessary.
• Use a socket to carefully remove the spark plug from cylinder 3.
• Inspect the spark plug for wear or deposits; replace if necessary.
• Gap the new spark plug according to manufacturer specifications.
• Install the new spark plug, tightening it to the manufacturer's specified torque.

3. Check and Replace Ignition Coil

• Tools Required: Socket set.
• Remove the ignition coil from cylinder 3 by unscrewing the mounting bolts.
• Inspect the coil for cracks or damage.
• Replace with a new ignition coil if damaged.
• Reinstall the ignition coil, ensuring it is seated properly and secure.

4. Inspect and Replace Fuel Injector

• Tools Required: Fuel line disconnect tool, socket set.
• Disconnect the fuel line from the injector.
• Remove the fuel injector from cylinder 3 by unscrewing its mounting.
• Inspect the injector for clogs or damage; clean or replace as necessary.
• Reinstall the fuel injector, reconnect the fuel line, and ensure there are no leaks.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 3.
• Insert the compression tester into the spark plug hole and crank the engine.
• Compare the reading to the manufacturer’s specifications; if low, further investigation may be required.