Check Engine Light Due to Hose Off of Air Filter Housing on Toyota Highlander

Problem Description and Possible Solution

When changing the air filter, it is easy to knock off a hose on the air filter housing, which is part of the emission control system. If the vehicle is driven with this hose disconnected, the Check Engine Light will illuminate.

Problem Data
RepairPal Verified
Average mileage: 116,380 (17,000–250,000)
Engines affected: 2.4L 4 Cylinder, 3.0L V6, 3.3L V6
10 model years affected: 2001, 2002, 2003, 2004, more2005, 2006, 2007, 2008, 2009, 2010
48 people reported this problem
Viewing 1 - 20 of 21 comments
I changed the air filter and this happened to me. A neighbor is a Toyota mechanic and told me about it when I called him about the check engine light.
I really hate this issue!! It happens most oil changes, except at the dealer, and it's a big time waster to get it resolved. I need a picture of this so I can fix it myself. Advance Auto parts store is happy to run the diagnostic and reset the CE light for me.
oil change place knocked hose off air filter housing...check engine light went off a few weeks after I fixed it.
Check engine light & VSC light come on together every time my air filter is changed. Hose comes off. Put hose on and disconnect battery to get the check engine lights to go off.
I had serviced the car (which I have been for years) check the air cleaner, then the engine light came on few days later. I brought to my Toyota dealership to see what triggered the light, they found this same hose came disconnected from the air cleaner housing. I asked how much for the repair- they smiled and said "all set" no charge.Good people.
Got car serviced at local Jiffy Lube - where I was duped into a $75 engine flush. Next day the check engine light came on. Fortunately a mechanic friend was able to inspect the car before I spent a million dollars at the dealership and found that there were several loose and/or incorrectly attached hoses and connectors..
technicians repeatedly know hose loose during servicing. check hose each time it is serviced. check engine light will go off on its own in about 50 start/ stops
This problem has occurred numerous times. Even when getting oil changed a a Toyota dealership! It happens whenever there is an oil change and I don't explain the problem to the mechanic. This has probably happened over ten times over the last 7 years. It is a real bothersome issue in states where emissions require no check engine light be on when tested.
This happens nearly every time I get my oil changed. I have finally learned to mention it to the technician when I drop the car off, and they generally can reattach it before I pick up.
This problem has occurred twice. Once was after a regular oil change, and the second was after I replaced the air filter myself. The air filter mechanism is hard to seat.
Discovered the hose was not attached after my check engine light appeared. I had gotten the air filter replaced several days before from a different shop. I was able to continue driving for a couple days until I could bring it into the shop but noticed the car lacked power.
Same thing others describe. Filter change with 30 point checkup. Someone replaced the air filter with wrong version. Did not latch the cleaner housing down correctly, and hose was off the back. Weird, deep throaty/gutteral sound when accelerating. Now have to reset the LED and hope that's all that went wrong.