why does my Toyota RAV4 Fourth Generation (2013-2018) check engine light come on when I accelerate

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery negative terminal for safety.

2. Address Diagnostic Trouble Codes (if applicable)

• Identify the DTCs retrieved from the OBD-II scanner and determine the specific area needing repair (e.g., P0171 for lean condition).
• Refer to a repair manual for specifics on addressing each code.

3. Inspect and Replace Faulty Components

A. Check Fuel System

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Start the engine and observe fuel pressure; it should meet manufacturer specifications (around 50-60 psi).
  3. If pressure is low, check the fuel pump or fuel filter for issues and replace as necessary.

B. Inspect Ignition System

• Tools Required: Socket set, torque wrench
• Sub-steps:
  1. Remove the ignition coil covers and inspect the spark plugs.
  2. Replace worn or damaged spark plugs with OEM parts, ensuring proper torque (typically 13-16 lb-ft).
  3. If ignition coils are faulty, replace them as needed.

C. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner
• Sub-steps:
  1. Disconnect the MAF sensor connector and remove the sensor from the air intake.
  2. Clean the sensor with MAF cleaner and allow it to dry completely.
  3. Reinstall the MAF sensor and reconnect the wiring.

4. Reconnect Battery and Test

• Reconnect the battery terminal.
• Start the engine and allow it to idle for a few minutes.
• Test drive the vehicle to ensure the check engine light does not reappear during acceleration.