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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the engine is cool and disconnect the negative battery terminal to avoid electrical shock.

2. Replace Spark Plug and Ignition Coil

1. Remove Engine Cover: If applicable, remove the engine cover using a socket set.
2. Access Spark Plug: Remove the ignition coil by unscrewing the retaining bolts and disconnecting the electrical connector.
3. Remove Spark Plug: Use a spark plug socket and ratchet to carefully remove the spark plug from cylinder 3.
4. Install New Spark Plug: Apply anti-seize lubricant to the threads of the new spark plug, then install it hand-tight followed by a torque of 13 lb-ft (17.5 Nm).
5. Install New Ignition Coil: Attach the new ignition coil in place, reconnect the electrical connector, and secure it with bolts.

3. Check and Replace Fuel Injector (if necessary)

1. Remove Fuel Rail: Disconnect the fuel line and electrical connectors from the fuel rail, then remove the rail from the engine.
2. Replace Injector: Pull out the old fuel injector and replace it with a new one. Ensure O-rings are lubricated and seated properly.
3. Reinstall Fuel Rail: Reattach the fuel rail, ensuring all connections are secure.

4. Reconnect Battery and Clear Codes

1. Reconnect Battery: Reattach the negative battery terminal.
2. Clear Codes: Use the OBD-II scanner to clear the P0303 code from the ECU.