How to replace idle air control valve?

2017 TOYOTA HIGHLANDER
96,000 MILES • 3.5L • V6 • 2WD • AUTOMATIC
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TONYLSF
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car isn't turning on, when car was on the idle when high passed 1 . battery is brand new. after checking code, I got error code P0505 idle control system P0174 system too lean bank 2 cleaned with carburetor with throttle cleaner and cleaned master flow with master flow cleaner. problem temporarily fixed, but issued retuned next day.
Nov 10, 2024 at 7:57 AM
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STRAILER
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There is no idle air control valve on this truck. There is a problem with the truck holding the idle speed, this is why you get this code and with the lean code it sounds like you have a vacuum leak.

Code P0505: Idle Control System Malfunction

Code P0174: System Too Lean (Bank 2)

Here is a guide to help you find the leak, use it when the engine is cold only:

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

Here is the lean mixture guide to help understand that problem as well:

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

Please go over these guides and get back to us.
Nov 10, 2024 at 9:17 AM