my Toyota Corolla E210 (2019-2024) is stalling while driving, what should I check?

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery to ensure safety while working on electrical components.

2. Check Fuel System

• Tools Required: Fuel pressure gauge, wrench set.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition on (do not start the engine) to check the fuel pressure reading. It should be within the specified range (consult the service manual for exact values).
• If pressure is low, inspect and replace the fuel pump if necessary.
• Inspect fuel filter for clogs and replace if needed.

3. Inspect Ignition System

• Tools Required: Socket set, torque wrench.
• Remove the ignition coils and inspect for cracks or damage.
• Replace any faulty ignition coils.
• Remove spark plugs and inspect for wear, fouling, or improper gap. Replace them if necessary, ensuring they are gapped to specification.
• Reinstall ignition components with proper torque specifications.

4. Test Throttle Position Sensor (TPS)

• Tools Required: Multimeter.
• Locate the TPS on the throttle body.
• Disconnect the electrical connector and use a multimeter to test the resistance across the terminals as per the service manual specifications.
• If out of range, replace the TPS and reconnect.

5. Reassemble and Reconnect

• Reconnect all components and electrical connections.
• Reconnect the battery.
• Start the vehicle and allow it to idle for a few minutes to check for any irregularities.