my Toyota Corolla E140 (2006-2013) has a check engine light for P0750, how to fix it?

Learn how to diagnose and fix P0750 transmission shift solenoid issue in Toyota Corolla E140. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Replace the Shift Solenoid

• Tools Required:
  • Socket set
  • Torque wrench
  • Multimeter
  • Screwdriver set
• Procedure:
  1. Raise the vehicle using a jack and secure it with jack stands.
  2. Remove the transmission pan by unscrewing the bolts with a socket wrench. Allow the old transmission fluid to drain into a suitable container.
  3. Locate the shift solenoid (typically found within the valve body or attached to the transmission).
  4. Disconnect the electrical connector from the solenoid.
  5. Remove the solenoid by unscrewing any retaining bolts.
  6. Install the new shift solenoid by reversing the removal steps, ensuring it is securely fastened.
  7. Reinstall the transmission pan with a new gasket, tightening the bolts to the manufacturer’s torque specifications (consult the service manual for exact torque values).
  8. Refill the transmission with the appropriate type and amount of fluid as specified in the owner's manual.

3. Reconnect Battery and Test

1. Reconnect the negative battery terminal.
2. Start the engine and let it idle for a few minutes.
3. Check for any leaks from the transmission pan and ensure smooth shifting through all gears.