2005 Toyota Avalon, about 100K miles on it. I am

Some of them are.please read this:

Recent 2017 Camry Recalls

• AIR BAGS:KNEE BOLSTERRecall for 2017 Toyota Camry
  • Recall AnnouncedDECEMBER 16 2016
  • NHTSA Reference#16V906000
  • Number Affected12
  Summary: Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain model year 2016 Avalon, and 2017 Camry vehicles manufactured August 3, 2016, to September 12, 2016. The front passenger knee air bag module may have been attached to the lower instrument panel with incorrect fasteners.
  Consequence: If the air bag was installed with incorrect fasteners, the fasteners may become loose over time, affecting the air bag deployment and increasing the risk of injury.
  Fix: Toyota will notify owners, and dealers will inspect the fasteners, and if necessary, replace the instrument panel brace and body bracket and reattach the air bag assembly, free of charge. The recall is expected to begin in December 2016. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's number for this recall is G05.
  For detailed information & supporting documents, see the official NHTSA page concerning recall #16V906000 »
  

Summary: Toyota is recalling certain model year 2004 avalon vehicles; 2004 and 2005Camry, Camry Solara, highlander, and sienna vehicles, 2006 highlander hybrid; 2004and 2005 Lexus ES330 and RX330; and 2006 Lexus rx400H vehicles manufactured from June 1, 2004 through March 31, 2005, equipped with the 1mz-fe or 3mz-fe ...7 days ago

2004 Toyota Camry Recalls ' CarComplaints.com

https://www.carcomplaints.com/Toyota/Camry/2004/recalls/..
Recall on camry 2004 Le Google Search

it should not be slipping that soon 6 years old and 15k miles. take it to a dealer and see if there is a recall on that transmission, or if it has a 10yr/100k miles drivetrain warranty.

Make sure that is not a light from the shift button options on the transmission check your owners manual about how to use the transmission. I would go to autozone and read the codes and find if they are trans codes that year of car is famous for the computer that shifts the transmission failing there is a recall that toyota has to replace that for free up to 100k after 100k your on your own

There is a current recall by Toyota for defective ECM's, check with your local dealer. It doesn't matter if you are not the original owner.

I recommend having the battery and charging system checked out. Car fax is great but it will never beat a good technician.

I just had the same problem with my 2001 avalon. AutoZone told me it was code Po171 and the car was running lean. You don't have to take it to the shop right away but don't wait too long. Took it and the mechanic had to clear out the mass air flow on top of the air bonx (sp?). I guess if this vent gets clogged it can strain the engine? Hope this helps!

Either that, or check to make sure the ground wire to the heating element isn't corroded or broken.

I would start with dropping the oil pan to check pick-up tube to oil pump could be cloge.Good luck.

Go to AutoZone and ask them to scan the ECU for codes since you have a check light on. They'll do it for free (a dealer usually gets an hour's labor to do this), and they'll give you a listing of the code and its definition. Post those up and then we can diagnose.