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

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1.
  • Tools required: Socket set, ratchet.
• Remove the spark plug from cylinder 1 using a spark plug socket.
• Inspect the spark plug for signs of wear, carbon buildup, or damage.
• Replace the spark plug if necessary with a new one that meets OEM specifications. Torque the spark plug to 13 lb-ft (17.5 Nm).

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, inspect the ignition coil.
• Unplug the ignition coil connector and remove the coil from the cylinder head.
• Replace with a new ignition coil if there is any sign of damage or malfunction.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Check Fuel Injector

• If the ignition components are functioning properly, check the fuel injector for cylinder 1.
• Disconnect the fuel injector connector and use a noid light to verify the injector is receiving a signal.
• If necessary, replace the fuel injector with a new one and ensure it's properly seated.

5. Verify Compression

• If misfire persists, perform a compression test on cylinder 1.
• If compression is below specifications (typically around 180 psi), further diagnosis of the internal engine components may be necessary.