how to fix P0302 misfire code on my Toyota Camry XV50 (2012-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Ensure the engine is cool before starting work.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector from cylinder 2.
• Remove the ignition coil by unscrewing the bolts and pulling it out.
• Unscrew the spark plug using the spark plug socket.
• Inspect the old spark plug for signs of wear or fouling.
• Install the new spark plug, ensuring it is torqued to the manufacturer’s specification (typically around 13 ft-lbs).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• If the spark plug replacement does not resolve the issue, proceed to check the ignition coil.
• Tools Required: Ratchet, socket set.
• Remove the ignition coil from cylinder 2 as previously described.
• Test the ignition coil with a multimeter to check for resistance (consult manufacturer's specifications).
• If faulty, replace the ignition coil with a new one.
• Reinstall the ignition coil and reconnect the connector.

4. Clean or Replace Fuel Injector

• If misfire persists, inspect the fuel injector for cylinder 2.
• Tools Required: Fuel injector removal tool (if necessary), cleaning solvent.
• Remove the fuel injector connector and any retaining clips.
• Extract the fuel injector from its rail.
• Clean the injector using a cleaning solvent or replace it with a new unit.
• Reinstall the injector and reconnect the electrical connector.

5. Compression Test

• If issues persist, perform a compression test on cylinder 2.
• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 2.
• Insert the compression gauge into the spark plug hole.
• Crank the engine a few times to get a reading.
• Compare the reading to the manufacturer's specifications. If low, further investigation is required for potential internal engine issues.