how to fix P0302 code on Toyota Camry XV40 (2007-2011)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety during repairs.
• Gather the following tools: OBD-II scanner, multimeter, socket set, torque wrench, compression tester, and possibly a fuel injector cleaner.

2. Inspect and Replace Spark Plug

• Remove the ignition coil for cylinder 2 by unscrewing any bolts and disconnecting the electrical connector.
• Remove the spark plug for cylinder 2 using a spark plug socket.
• Inspect the spark plug for signs of wear or fouling. If damaged, replace it with a new spark plug that meets specifications.
• Reinstall the spark plug and torque it to the manufacturer's specifications (typically around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Test and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil using a multimeter. Measure the primary and secondary resistance according to specifications.
• If the coil is faulty, replace it with a new ignition coil designed for the Toyota Camry XV40.
• Reinstall the new ignition coil and ensure it is securely fastened.

4. Inspect and Clean Fuel Injector

• If the ignition system is functioning properly, check the fuel injector for cylinder 2.
• Disconnect the fuel injector connector and remove the injector from the rail.
• Clean the injector using a fuel injector cleaner or consider replacing it if it is clogged or malfunctioning.
• Reinstall the injector and reconnect the electrical connector.

5. Perform Compression Test

• If misfire persists, perform a compression test on cylinder 2.
• Remove the spark plug and install the compression tester.
• Crank the engine and record the compression reading. It should be within the manufacturer's specifications (typically around 180 psi).
• If compression is low, further investigation into valves, piston rings, or head gasket may be needed.