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

Solution

1. Preparation

• Gather all 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

• Tools Required: Socket set, torque wrench, spark plug socket, gapping tool.
• Remove the ignition coil cover if applicable.
• Disconnect the ignition coil connector and remove the ignition coil from cylinder 1.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear; if damaged or fouled, replace it.
• Ensure the new spark plug is properly gapped according to manufacturer specifications.
• Install the new spark plug and torque it to the recommended value (typically around 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

• If the spark plug is fine, check the ignition coil for continuity and resistance using a multimeter.
• If faulty, replace the ignition coil.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Fuel Injector Testing

• If the ignition components are functioning, check the fuel injector for cylinder 1.
• Disconnect the fuel injector connector and use a noid light to test for signal.
• If no signal is detected, inspect the wiring and connectors.
• If the fuel injector is faulty, remove and replace it with a new unit.

5. Reassemble and Reconnect

• Once all components are checked or replaced, reassemble any removed parts.
• Reconnect the negative battery terminal.
• Clear the P0301 code using the OBD-II scanner.