how to address the P0301 code in my Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool completely before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, anti-seize compound.
• Remove the ignition coil by unscrewing the retaining bolts and disconnecting the electrical connector.
• Use a spark plug socket to remove the old spark plug.
• Inspect the spark plug for damage and replace it with a new one, applying anti-seize compound to the threads.
• Torque the spark plug to the manufacturer’s specifications (typically around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter (for testing).
• Check the ignition coil with a multimeter for proper resistance values; replace if faulty.
• Install the new ignition coil by connecting the electrical connector and securing it with bolts.

4. Test Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaner.
• Disconnect the fuel injector connector and perform a resistance test.
• If the injector is faulty, replace it with a new one.
• Optionally, clean the fuel injector using a fuel injector cleaning kit.

5. Compression Testing

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1 and install the compression tester.
• Crank the engine and note the compression reading; it should be within manufacturer specifications (typically around 180-200 psi).
• If low, further investigation into the engine internals may be necessary.