how to address P0301 code in my Toyota Camry XV50 (2012-2017)?

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before working on it.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, gap gauge
• Remove the ignition coil by unscrewing the retaining bolts and disconnecting the connector.
• Unscrew the old spark plug using a spark plug socket.
• Inspect the old spark plug for signs of wear or fouling.
• Install a new spark plug, ensuring the correct gap is set (typically 0.044 inches for the Camry).
• Torque the spark plug to the manufacturer's specification (approximately 13 lb-ft).
• Reinstall the ignition coil.

3. Test and Replace Ignition Coil (if necessary)

• Tools Required: Multimeter
• Check the resistance of the ignition coil using a multimeter; compare readings to specifications in the repair manual.
• If the coil is faulty, remove it and install a new ignition coil, ensuring all connections are secure.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, noid light (optional)
• Disconnect the fuel injector connector and check for proper voltage with a multimeter.
• If there is no voltage, inspect wiring and connections.
• Use a fuel injector cleaning kit to clean the injector, or replace it if it’s clogged or malfunctioning.

5. Verify Compression

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1 and install the compression tester.
• Crank the engine and record the compression reading; it should be within the manufacturer's specified range (typically 180-220 PSI).
• If compression is low, further investigation into the cylinder's health is needed.