what should I do if my Toyota Camry Seventh Generation (2012-2017) has a P0301 misfire code

Solution

1. Preparation

• Gather all required tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, gap gauge.
• Remove the ignition coil from cylinder 1.
  • Unplug the electrical connector and unbolt the coil.
• Remove the spark plug using a spark plug socket.
• Inspect the old spark plug for wear and ensure the new spark plug is gapped according to specifications.
• Install the new 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. Inspect and Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
• If the ignition coil is damaged, remove it as described above.
• Install a new ignition coil, ensuring it is seated correctly and the connector is secure.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector puller (if needed), cleaning solvent.
• If the injector is clogged, attempt to clean it with a fuel injector cleaning solution.
• If cleaning does not work, replace the injector by disconnecting the electrical connector and fuel lines (ensure to relieve fuel pressure beforehand) and install the new injector.

5. Final Assembly

• Reconnect the battery terminal.
• Start the engine and let it run for a few minutes to check for proper operation.