Yaris has high idle

[boyse7en]

I bought my daughter a 2005 Toyota Yaris 1.3VVTi as her first car.
Drives very nicely but has a very high idle when it is warmed up.

Cold start idle is about 1000rpm, which sounds right, and i would expect this to drop to 700-800rpm once the engine is warmed up but instead the idle rises to around 1400rpm.

I gave the car a light service - oil, filter, air filter, spark plugs - but it hasn't made any difference.

Googling doesn't seem to throw up much help - most issues seem to be with low idle and stalling, which is the opposite of what i have got!

[GreenV8S]

A stuck iacv could cause symptoms like that. I don't know that car, but on some cars it's common for them to get coked up and need cleaning occasionally.

[Belle427]

Check for vac leaks too, perished hoses etc.

[boyse7en]

Bit of investigation last night and i think it is the idle control valve is either stuck or kaput.
Going to give it a clean and see if that works.

Thought I'd look up how much a replacement would be, and I'm having an absolute nightmare trying to find the part for sale!
I have the Toyota part number (22270-23020) and the OE manufacturer part number (Denso 136800-1702) and still can't find the part on any of the usual sites - ebay, ECP, GSF etc. It looks like I would have to buy one off of Aliexpress, which doesn't seem right. There must be thousands of these 1.3 Yaris in existence, they're not a rare car!

[stevieturbo]

So you haven't tried Toyota ?

[Belle427]

I would only fit genuine or a proven equivalent for parts like this.
Most aftermarket stuff is junk.

[Privatepile]

I had the same problem with a similar aged Civic. I was able to remove the valve and clean it with carb cleaner. Totally fixed

[GiantEnemyCrab]

But of a clean and scrub in brake cleaner / carb cleaner and will all good

[MakaveliX]

Sometimes the ECU can increase idle rpm in order to assist the alternator to charge the battery when they are wearing down. Have you checked the battery voltages ?