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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 1 by unbolting it and gently pulling it out.
• Use a spark plug socket to unscrew and remove the old spark plug.
• Inspect the cylinder head for debris and clean if necessary.
• Install the new spark plug, hand-tighten, then use a torque wrench to tighten it to the manufacturer’s specification (usually around 13 lb-ft).
• Reinstall the ignition coil.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set
• If the ignition coil shows signs of damage or wear, remove the bolts securing the coil and disconnect the wiring harness.
• Install the new ignition coil in reverse order of removal, ensuring it is seated properly.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector removal tool, O-ring lubricant
• Disconnect the fuel line and electrical connector from the fuel injector.
• Remove the fuel injector and inspect for clogs. Clean with an appropriate solvent or replace it if necessary.
• Lubricate the O-rings of the new injector with engine oil, then install it back into position.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0301 code and any other stored codes.