how to fix P0301 code in Toyota RAV4 XA40 (2013-2018)

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

• Remove the spark plug from cylinder 1 using a socket wrench.
• Inspect the spark plug for carbon buildup, wear, or damage. Replace if necessary.
• Install a new spark plug (specifications: NGK ILZKR7B11 or equivalent).
• Torque to manufacturer specification (typically 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the ignition coil connector.
• Remove the ignition coil from cylinder 1 using a socket wrench.
• Inspect the ignition coil for cracks or damage. Replace if needed.
• Install the new ignition coil and reconnect the electrical connector.

4. Test and Replace Fuel Injector (if necessary)

• Use a multimeter to test the resistance of the fuel injector.
• If out of specification, remove the fuel injector from cylinder 1.
• Clean the injector or replace it with a new one as required.
• Reinstall the injector, ensuring it is seated properly in the fuel rail.

5. Perform Compression Test (if misfire persists)

• Remove all spark plugs to allow for easier cranking.
• Insert a compression gauge into cylinder 1 and crank the engine.
• Compare the reading to manufacturer specifications (typically around 180 psi).
• If compression is low, further investigation into valve or piston issues may be necessary.

6. Final Steps

• Reconnect the negative battery terminal.
• Start the engine and observe for any misfires or warning lights.