how to fix P0302 misfire code in Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench, ratchet, gap gauge.
• Remove the ignition coil from cylinder 2 by unbolting it and disconnecting the electrical connector.
• Remove the old spark plug using a spark plug socket and ratchet.
• Inspect the spark plug for wear or fouling; clean the area around the spark plug hole.
• Install a new spark plug, ensuring it is gapped to the manufacturer's specification (typically around 0.043 inches for many Toyota engines).
• Torque the spark plug to the manufacturer's specification (usually around 13 lb-ft).

3. Replace Ignition Coil (if necessary)

• Tools Required: Ratchet, socket set.
• If the ignition coil appears damaged or faulty, remove it by unbolting and disconnecting it from the wiring harness.
• Install the new ignition coil onto the spark plug, securing it with bolts and reconnecting the electrical connector.

4. Test Fuel Injector (if required)

• If the injector was found to be faulty during diagnostics, replace it.
• Tools Required: Fuel injector removal tool, socket set.
• Relieve fuel pressure from the fuel system by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel injector connector and remove the fuel rail if necessary.
• Replace the faulty fuel injector and reassemble the fuel rail, ensuring proper sealing.