how to fix the P0302 misfire code on my Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal for safety.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil cover if applicable.
• Disconnect the ignition coil connector and remove the ignition coil from cylinder 2.
• Remove the spark plug using a spark plug socket.
• Inspect the old spark plug for wear, carbon buildup, or damage.
• Install a new spark plug, ensuring it is gapped correctly according to manufacturer specifications.
• Torque the spark plug to the manufacturer's specification (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• If the spark plug appears normal, check the ignition coil.
• Tools Required: Socket set.
• Remove the ignition coil from cylinder 2.
• Inspect the ignition coil for cracks or damage.
• Install a new ignition coil if necessary.
• Reconnect the ignition coil connector.

4. Check Fuel Injector

• Tools Required: Noid light or fuel pressure gauge.
• Disconnect the fuel injector connector for cylinder 2.
• Use a noid light to check for signal; if there is no signal, inspect wiring and connectors.
• If the injector is faulty, remove it using a fuel injector removal tool.
• Install a new fuel injector and reconnect the electrical connector.

5. Address Vacuum Leaks

• Inspect hoses and gaskets for signs of wear or damage near cylinder 2.
• Replace any damaged vacuum hoses or gaskets to ensure proper sealing.