my Toyota Corolla E210 (2019-2024) has a check engine light and poor acceleration

Solution

1. Preparation

• Gather tools and parts.
• Safety gear: gloves and safety glasses.
• Disconnect the battery to prevent electrical shorts.

2. Addressing the Check Engine Light

1. Clear Error Codes:

   • Connect the OBD-II scanner and clear any stored trouble codes.
   • Reconnect the battery.

2. Replace Faulty Components:

   • If any codes indicate specific failures (e.g., MAF sensor, fuel pump), replace those components.
   • Ensure to use OEM or high-quality aftermarket parts.

3. Throttle Body Cleaning

1. Remove Throttle Body:

   • Disconnect the intake duct and any electrical connectors.
   • Unbolt the throttle body from the intake manifold.

2. Clean Throttle Body:

   • Use throttle body cleaner and a soft cloth to clean the interior surfaces.
   • Ensure the throttle plate moves freely.

3. Reinstall Throttle Body:

   • Torque the throttle body bolts to the manufacturer’s specifications (usually around 89 in-lbs).
   • Reconnect all electrical connectors and intake duct.

4. Spark Plug Replacement

1. Remove Spark Plugs:

   • Use a socket wrench to remove the spark plugs from the cylinder head.

2. Inspect and Replace:

   • Inspect the spark plugs for wear; replace them if worn or fouled.
   • Use the correct gap specification as per the manufacturer’s specifications.

3. Reinstall Spark Plugs:

   • Install new spark plugs and torque them to the recommended specification (typically 13-15 ft-lbs).

5. Fuel System Inspection

1. Test Fuel Pressure:

   • Connect the fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position (do not start the engine) to check for pressure.
   • If pressure is below specs, consider replacing the fuel pump.

2. Inspect Fuel Filter:

   • If equipped, check and replace the fuel filter if it is clogged.