Question

I have the engine code P1509 on my Chevrolet, what is the best solution?

Answer 1

Hi there

This code points to a problem with high idle speed and the iac not responding. This can be caused by a faulty IAC valve, but watch out for other possible causes for high idle. If you have a vacuum leak it can cause high idle and will make this code appear.

P1509 CHEVROLET - Idle Speed High Idle Air Control System Not Responding
Read more: https://www.autocodes.com/p1509_chevrolet.html