why does my check engine light keep coming on in my Toyota Camry

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery's negative terminal to prevent any electrical short.

2. Replace Faulty Components

2.1. Spark Plug Replacement

• Remove the ignition coil covers using a socket set.
• Disconnect the ignition coils and remove them.
• Unscrew the old spark plugs using a spark plug socket.
• Gap the new spark plugs according to manufacturer specifications and install them.
• Reinstall ignition coils and covers.

2.2. Inspect and Replace Gas Cap

• Remove the existing gas cap.
• Inspect for damage or wear on the rubber seal.
• If damaged, replace with a new gas cap that meets OEM specifications.

2.3. Fix Air Intake Leaks

• Visually inspect the air intake hoses and connections.
• Replace any damaged hoses or clamps.
• Use a smoke test if necessary to identify hidden leaks.

3. Check and Repair Fuel System

• Connect a fuel pressure gauge to the fuel rail.
• Compare the reading against manufacturer specifications.
• If pressure is low, check the fuel pump and filter for blockages or failure.