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

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.

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Average mileage: 114,397 (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
42 people reported this problem
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problem details
2001 Toyota Highlander - 3.0L V6 98,500 mi,
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.
2003 Toyota Highlander - 3.0L V6 71,000 mi,
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.
2002 Toyota Highlander - 3.0L V6 151,000 mi,
every time a tech looks at the air filter, the hose in back disconnects
2001 Toyota Highlander - 3.0L V6 250,000 mi,
Every time someone checks the air filter this hose comes off.
2002 Toyota Highlander - 3.0L V6 115,453 mi,
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..
2003 Toyota Highlander - 3.0L V6 140,795 mi,
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.
2003 Toyota Highlander - 2.4L 4 Cylinder 95,500 mi,
oil change place knocked hose off air filter housing...check engine light went off a few weeks after I fixed it.
2003 Toyota Highlander - 3.0L V6 190,000 mi,
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
2002 Toyota Highlander - 3.0L V6 17,000 mi,
SAME PROBLEM. FOUND OUT DEALER DID NOT PROPERLY REINSTALL FILTER HOUSING AFTER EXAMING AIR FILTER
Almost every time I go in for an oil change, a hose is knocked loose, the check engine light comes on, and I have to go back to have them re-attach the hose and reset the check engine light.
2003 Toyota Highlander - 3.0L V6 80,000 mi,
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.
2003 Toyota Highlander - 3.0L V6 100,000 mi,
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.
2002 Toyota Highlander - 3.0L V6 180,000 mi,
same thing happened to me.
Main freg light to turn off
2003 Toyota Highlander - 3.0L V6 45,000 mi,
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.
2001 Toyota Highlander - 2.4L 4 Cylinder 72,500 mi,
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.
2002 Toyota Highlander - 3.0L V6 114,000 mi,
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.
2002 Toyota Highlander - 2.4L 4 Cylinder
After oil change, the check engine light came on. Hose was not connected.