Error code P0505

This codes is telling us the computer cannot control the engine idle which can be caused by a dirty throttle bore or a vacuum leak.

Here are two guide that will help us fix the problem:

https://www.2carpros.com/articles/throttle-actuator-service

and

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please let us know what happens.

Cheers

I believe the P0171 is because while running at idle I removed each injector electrical connection one at a time than replaced it before taking the next one off to see if one would sound different.

When cold the car hesitates badly when taking off. Once warm it runs good.

Thanks for any help.

I had this problem the throttle bore was gunked up bad. once I cleaned it the problem went away.