how to solve P0301 misfire code in Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery before beginning work to prevent electrical shorts.

2. Inspect Ignition Components

• Tools Required: Socket set, torque wrench, ignition coil puller.
• Remove the engine cover if applicable.
• Disconnect the wiring harness from the ignition coil in cylinder 1.
• Remove the ignition coil using a socket set.
• Inspect the ignition coil for cracks or damage; replace if necessary.
• Remove the spark plug from cylinder 1 using the appropriate spark plug socket.
• Inspect the spark plug for wear or fouling; replace if necessary with a spark plug that meets OEM specifications.
• Reinstall the ignition coil and reconnect the wiring harness.

3. Check Fuel Delivery

• Tools Required: Fuel pressure gauge, injector cleaner.
• Disconnect the fuel line from the fuel injector for cylinder 1.
• Attach the fuel pressure gauge to the fuel line and turn the ignition on without starting the engine to check the fuel pressure.
• Ensure the fuel pressure meets manufacturer specifications; replace the fuel pump if it is low.
• If fuel pressure is adequate, remove the fuel injector for cylinder 1 using the appropriate tool.
• Clean the injector using an injector cleaner or replace it if it is clogged or damaged.

4. Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 1 if not already removed.
• Insert the compression gauge into the spark plug hole.
• Crank the engine several times and record the compression reading.
• Compare the reading to manufacturer specifications; if low, further investigation is required (e.g., valve seals, piston rings).

5. Reassemble and Reconnect

• Reinstall the spark plug and ignition coil.
• Reconnect any disconnected components and the battery.
• Start the engine and allow it to reach operating temperature.