Why would a cold idle speed be 1500rpm when it's hot outside? on 2000 Toyota 4Runner

It's a 90 degrees out every day. The light came on and the code read- rich mixture problem. There isn't any gas smell from the air filter. I bought a new gas cap. May have to get new o2 sensors. The intake housing coupling (the accordion one)cracked and was repaired with black silicone.

Asked by for the 2000 Toyota 4Runner
what are your eng codes?
air/fuel mix system rich (bank 1)
probable cause:
1.injector or fuel pressure regulator leakage
2.faulty MAF/VAF sensor
3.ECT faulty
4.Faulty H02S/AF sensor
I just had valve cover gaskets and ignition coils installed. Thank You for your help.
reurn and ask if they could have left something unplugged or connected wrong
Qualified Local Toyota Shops
Qualified Toyota Shops For This Repair
921 N Parker St
Technical Ability
Tools & Equipment
Customer Service
Customer Amenities
(714) 486-0367