how to fix P0301 code in Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench
• Remove the ignition coil from cylinder 1 by unscrewing bolts and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for carbon buildup or damage; replace if necessary.
• Torque the new spark plug to the manufacturer’s specification (typically around 13-16 lb-ft).
• Reinstall the ignition coil and connect the electrical connector.

3. Test and Replace Ignition Coil (if necessary)

• Tools Required: Multimeter
• Use a multimeter to test the resistance of the ignition coil; refer to specifications for your model.
• If the resistance is outside of the specified range, replace the ignition coil.
• To replace, remove the old coil and install the new one, ensuring proper connection.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner kit
• If the injector is suspected to be clogged, remove it from the engine.
• Clean the injector using the fuel injector cleaning kit according to the manufacturer's instructions.
• Reinstall the injector ensuring proper sealing and connection.

5. Perform Compression Test

• Tools Required: Compression tester
• Remove spark plugs from all cylinders for accurate testing.
• Insert the compression tester into the cylinder 1 spark plug hole and crank the engine.
• Record the compression reading; it should meet manufacturer specifications (typically around 180-220 psi).
• If low, consider further inspection for valve or head gasket issues.