Report: Oxygen Sensor May Fail
Toyota Sienna Problem
Average Mileage: 89,203 mi (13,000 mi - 177,000 mi)
Visitor, 2001 Toyota Sienna, 130,000 mi
Initial problem was indicated by "Check Engine" light. Follow-up with a OBD-II code reader (a $40 must-have item for a DIY repairman) pin-pointed a faulty Air/Fuel sensor on rear exhaust manifold. Replaced with a new sensor (about $160) from local parts store. Access to the sensor is cramped and limited, but certainly do-able. Cleared codes, replaced sensor, drove for 100 miles, passed state emissions inspection, no issues after 2 months.
Visitor, 2001 Toyota Sienna, 65,000 mi
Check engine light came on at about 25000 miles. Toyota dealership found thatboth O2 sensors were bad . I had them replace them at about $600. At 50,000 miles the O2 sensors went bad again. This time I did not bother replacing them as the gas mileage not noticeably affected. But, I need to stare at the check engine light every day.
Visitor, 2002 Toyota Sienna, 99,000 mi
toyota highlander also has bad oxygen sensors took it to toyota they replaced front and back 02 sensors at 1,200. now they tell me another sensor is bad because my heat stopped working and that will cost me 800,00 more dollars.to toyota is not worth having.
Visitor, 2007 Toyota Sienna, 65,000 mi
Oxygen Sensor is bad.
Visitor, 2003 Toyota Sienna, 88,260 mi
Engine light came on
Visitor, 2008 Toyota Sienna, 13,000 mi
Very upset. Oxygen and fuel sensors bad on Toyota Sienna that only has 13,000 miles on it and has been impeccably maintained. Not a Toyota fan if I am going to have to pay for this.
Visitor, 2002 Toyota Sienna, 35,000 mi
The Oxygen sensor at the back of the engine was replaced to stop the engine light.
Not sure about mileage.
Had to have 2 sensors replaced within a couple of years. Mechanic suggested clicking gas cap at least 7 times when tightening. Have had no problems since...fingers crossed.
Visitor, 2003 Toyota Sienna, 177,000 mi
O2 sensor backside of firewall
Visitor, 2003 Toyota Sienna, 62,988 mi
The engine light is always on.