how to fix P0302 misfire code in Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool and disconnect the battery to prevent electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench
• Remove the engine cover if applicable.
• Remove the spark plug boot from the ignition coil.
• Use a spark plug socket to remove the spark plug from cylinder 2.
• Inspect the old spark plug for signs of wear (e.g., deposits, wear pattern).
• Install a new spark plug with a gap set to manufacturer specifications (typically 0.043 inches).
• Torque the spark plug to the specified value (usually around 13 lb-ft).
• Reattach the ignition coil and ensure the boot is seated properly.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set
• Remove the screws or bolts holding the ignition coil in place.
• Disconnect the electrical connector from the ignition coil.
• Install the new ignition coil by reversing the removal process, ensuring it is securely fastened.
• Reconnect the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector removal tool (if necessary)
• Disconnect the fuel line and electrical connector from the fuel injector.
• Remove the fuel injector from the rail, checking for any debris.
• If cleaning, use injector cleaner and compressed air. If replacing, install the new injector ensuring O-rings are lubricated.
• Reattach the fuel line and electrical connector securely.

5. Reassemble and Test

• Reconnect the battery.
• Start the engine and allow it to reach operating temperature.
• Clear the fault codes using the OBD-II scanner and monitor for any reoccurrence of the P0302 code.