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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool.
• Disconnect the negative battery cable to avoid electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the engine cover if necessary.
• Using the socket set, remove the spark plug from cylinder 1.
• Inspect the old spark plug for signs of wear or fouling.
• Install the new spark plug by hand to avoid cross-threading, then torque to manufacturer's specification (typically about 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter (for testing).
• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the ignition coil using the socket set.
• Use a multimeter to check for proper resistance (typically between 0.5 and 1.5 ohms).
• If faulty, replace with a new ignition coil and reconnect the electrical connector.

4. Check Fuel Injector

• Tools Required: Fuel injector cleaning kit (if cleaning is necessary).
• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel injector and inspect for clogs or damage.
• If clogged, use a fuel injector cleaning kit to clean it; otherwise, replace with a new injector.
• Reinstall the fuel injector and reconnect the connector.

5. Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 1 again.
• Insert the compression gauge into the spark plug hole.
• Crank the engine several times and record the compression reading.
• Compare the reading with manufacturer specifications (typically around 180 psi).
• If the compression is low, further investigation into engine internals may be needed.