how to fix P0301 code in Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool if it has been running.

2. Inspect and Replace Spark Plugs

• Remove the ignition coil cover if present.
• Unplug the ignition coil connector from cylinder 1.
• Remove the ignition coil using a socket set.
• Extract the spark plug using a spark plug socket.
• Inspect the spark plug for wear, carbon buildup, or damage; replace if necessary.
• Install a new spark plug with a gap set to manufacturer specifications (typically around 0.043 inches).
• Reinstall the ignition coil and reconnect the connector.

3. Test and Replace Ignition Coil

• Use an ignition coil tester to check the function of the ignition coil for cylinder 1.
• If the ignition coil fails the test, replace it with a new one.
• Reassemble any removed components.

4. Inspect and Replace Fuel Injector if Necessary

• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel rail if needed (check service manual for specific instructions).
• Inspect the fuel injector for clogs or damage.
• Use a noid light to test for proper electrical signal to the fuel injector.
• Replace the fuel injector if it fails the test or shows signs of failure.
• Reconnect the fuel rail and injectors.

5. Final Assembly and Battery Reconnection

• Reassemble any components that were removed during the inspection and repair process.
• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.