how to fix P0301 code in Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting any work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if necessary.
• Locate the spark plug for cylinder 1 (refer to the vehicle's service manual for specific location).
• Use the spark plug socket to remove the old spark plug.
• Inspect the old spark plug for signs of fouling or wear.
• Install the new spark plug, ensuring it is gapped correctly according to specifications (typically 0.043 inches for RAV4).
• Torque the spark plug to the manufacturer's specifications (usually around 13 lb-ft).

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Disconnect the wiring harness from the ignition coil on cylinder 1.
• Remove the bolts securing the ignition coil and lift it out.
• Install the new ignition coil and secure it with bolts, torquing to manufacturer specifications (usually around 80 lb-in).
• Reconnect the wiring harness.

4. Inspect Fuel Injector

• Tools Required: Fuel injector removal tool (if necessary)
• Disconnect the fuel line and electrical connector from the injector.
• Remove the fuel injector from the fuel rail.
• Inspect the injector for clogs and clean it if necessary or replace it if defective.
• Reinstall the injector and reconnect the fuel line and electrical connector.

5. Reassemble and Clear Codes

• Reinstall any engine covers removed during the process.
• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the trouble codes.