How do I troubleshoot the code p1518 on a 2003 Cadillac Escalade?

Question

On the dashboard the message "Engine power reduced" shows. I have already replaced the throttle actuator and I still get the problem.

Answer 1

P1518 Throttle actuator control module performance

This is usually caused by poor mating contact with the TAC motor. try a electrical cleaner and ensure the connection do not separate easy