how to fix P0301 code in Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Remove the ignition coil by unscrewing any retaining bolts and disconnecting the electrical connector.
• Use a spark plug socket to remove the old spark plug from cylinder 1.
• Inspect the spark plug socket for debris.
• Install a new spark plug, ensuring it is gapped according to manufacturer specifications (typically 0.043 inches for Toyota).
• Reinstall the ignition coil and connect the electrical connector.

3. Inspect or Replace Ignition Coil

• If the ignition coil shows signs of damage, replace it with a new one.
• Ensure the new coil is seated properly and bolt it in place.

4. Check Fuel Injector

• If the injector is suspected to be clogged, remove it by disconnecting its electrical connector and unscrewing it from the rail.
• Clean the injector using a specialized fuel injector cleaner or replace it if necessary.
• Reinstall the injector, ensuring it is securely attached.

5. Compression Test

• If compression is low, perform a wet compression test to determine if the piston rings or valves are faulty.
• Repair any internal engine issues found during this test.