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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool if it has been running.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool.
• Remove the ignition coil cover if applicable.
• Disconnect the ignition coil connector and remove the ignition coil.
• Unscrew the spark plug using a socket wrench.
• Inspect the spark plug for wear; replace with a new spark plug if necessary.
• Ensure the new spark plug is gapped to manufacturer's specifications (typically 0.043 inches for most Toyota engines).
• Install the new spark plug and torque it to the specified value (usually around 13 lb-ft).
• Reinstall the ignition coil and connector.

3. Test Ignition Coil

• Tools Required: Multimeter.
• Use a multimeter to check the primary and secondary resistance of the ignition coil according to specifications.
• If the coil is out of range, replace it with a new ignition coil.

4. Test Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaning kit.
• Connect the fuel pressure gauge to the fuel rail to ensure adequate fuel pressure.
• If pressure is low, inspect the fuel pump and filter.
• If pressure is adequate, use the injector cleaning kit to clean and test injector performance.

5. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner.
• Use a smoke machine to check for leaks in the intake manifold and surrounding areas.
• If using carburetor cleaner, spray around suspected leak areas and listen for RPM changes.
• Repair any leaks found by replacing gaskets or hoses.