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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Locate the spark plug for cylinder 1.
3. Use a spark plug socket to remove the old spark plug.
4. Inspect the spark plug for signs of wear (e.g., carbon deposits, cracks).
5. If damaged, install a new spark plug with the correct gap (typically 0.043 inches for Toyota).
6. Torque the new spark plug to the manufacturer's specification (usually around 13 lb-ft).

3. Inspect and Replace Ignition Coil

1. Locate the ignition coil for cylinder 1.
2. Disconnect the electrical connector from the ignition coil.
3. Remove the ignition coil mounting bolts using a socket set.
4. Pull the ignition coil out of the cylinder head.
5. Inspect the coil for cracks or burning. If defective, install a new ignition coil.
6. Reinstall the ignition coil and torque the mounting bolts to specification (typically 7 lb-ft).

4. Inspect and Replace Fuel Injector

1. Locate the fuel injector for cylinder 1.
2. Disconnect the electrical connector and fuel line (use caution as fuel may spill).
3. Remove the retaining clips and take out the fuel injector.
4. Inspect the injector for clogs or damage. Replace if necessary with a new injector.
5. Reinstall the fuel injector, ensuring proper seating, and reconnect the electrical connector and fuel line.

5. Reassemble and Test

1. Reattach any components removed during the inspection.
2. Reconnect the negative battery terminal.
3. Start the engine and check for any unusual noises or check engine light.