how to fix the P0302 misfire code on my Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before beginning work.

2. Replace Spark Plug

1. Remove the engine cover if applicable.
2. Locate the spark plug for cylinder 2.
3. Use a socket and ratchet to loosen and remove the spark plug.
4. Inspect the old spark plug for wear; replace with a new spark plug that meets OEM specifications (e.g., NGK or Denso).
5. Torque the new spark plug to the manufacturer's specified value (typically around 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

1. Disconnect the wiring harness from the ignition coil on cylinder 2.
2. Remove the ignition coil using a socket and ratchet.
3. Inspect the coil for damage; replace it with a new one if necessary.
4. Reinstall the new ignition coil, ensuring proper seating and connection of the wiring harness.

4. Check and Replace Fuel Injector

1. Disconnect the fuel injector connector for cylinder 2.
2. Remove the fuel rail (if necessary) to access the injector.
3. Inspect the fuel injector for blockages or damage; replace if needed.
4. Reinstall the fuel injector and reconnect the fuel rail and connector.

5. Perform Compression Test

1. Remove the spark plug from cylinder 2.
2. Insert a compression gauge into the spark plug hole.
3. Crank the engine and record the compression reading.
4. Compare the reading to the manufacturer's specifications; if low, further investigation into engine internals may be required.