how to fix the P0301 code on my Toyota RAV4 XA50 (2019-2024)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Use the spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for wear; if damaged, replace it with a new one.
• Torque the new spark plug to manufacturer specifications (typically around 13-15 lb-ft).
• Reinstall the engine cover if removed.

3. Check and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Disconnect the electrical connector from the ignition coil in cylinder 1.
• Remove the mounting bolts for the ignition coil using the socket set.
• Replace the ignition coil with a new one and secure it with the bolts, torquing them to manufacturer specifications.
• Reconnect the electrical connector.

4. Test Fuel Injector

• Tools Required: Fuel injector cleaner, multimeter (optional).
• Disconnect the fuel injector connector in cylinder 1.
• If needed, perform a resistance test on the injector using a multimeter; compare results with specifications.
• Clean the fuel injector using a fuel injector cleaner. If cleaning does not resolve the issue, replace the injector with a new one.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1 again.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the compression reading; compare with specifications (typically around 180 psi).
• If the reading is low, further investigation into engine internals may be needed.