my Toyota Camry XV50 (2012-2017) is showing P0300 code what does it mean

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect Ignition Components

• Remove the ignition coil(s) from the affected cylinders.
• Inspect the spark plugs for wear or damage; replace if necessary.
• Check the ignition coils for proper resistance using a multimeter; replace any that are faulty.

3. Check Fuel System

• Use a fuel pressure gauge to measure fuel pressure at the rail; compare to manufacturer specifications.
• Inspect fuel injectors for blockages or leaks. Clean or replace as needed.

4. Inspect Vacuum Lines

• Visually inspect all vacuum hoses for cracks, breaks, or disconnections.
• Replace any damaged vacuum lines to ensure proper engine performance.

5. Compression Test

• Remove spark plugs and connect a compression tester to each cylinder.
• Crank the engine and record compression readings for each cylinder; compare to manufacturer specifications.
• Address any cylinders with low compression due to mechanical issues.