how to fix P0301 code on my Toyota Camry XV50 (2012-2017)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, noid light.
• Ensure the vehicle is parked on a level surface, and the engine is cool before starting repairs.

2. Replace Spark Plug

• Sub-steps:
  1. Disconnect the negative battery terminal to prevent electrical shorts.
  2. Remove the ignition coil from cylinder 1 by unbolting it and disconnecting the electrical connector.
  3. Remove the spark plug using a socket wrench. Inspect the spark plug for wear and carbon deposits.
  4. Install a new spark plug, ensuring it is gapped according to manufacturer specifications (typically between 0.043 inches for most Toyota engines).
  5. Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil is damaged or faulty (as determined during inspection), remove it from the engine.
  2. Install the new ignition coil, ensuring it is seated properly on the spark plug.
  3. Reconnect the electrical connector and secure it with bolts.

4. Check and Replace Fuel Injector (if necessary)

• Sub-steps:
  1. If the fuel injector is found to be faulty during diagnostics, remove the fuel rail from the engine.
  2. Carefully detach the fuel injector from the rail.
  3. Install the new fuel injector, ensuring it is properly seated and secured.
  4. Reinstall the fuel rail and reconnect any hoses or connectors.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0301 code from the vehicle’s computer system.