O2 sensor or transmission?

Asked by Mar 01, 2017 at 09:06 PM about the 2004 Toyota Sienna 4 Dr LE AWD Passenger Van

Question type: Maintenance & Repair

I recently purchased this vehicle and was
told it needed a o2 sensor on the catalytic
converter. But I can't get the van to go over
50 mph on the interstate and it seems like
it's more than just a sensor needed. Any help
is appreciated!

3 Answers

111,105

http://www.obdii.com/articles/Understanding_Oxygen_Sensors.htm l

1 of 1 people found this helpful.
71,025

What trouble code(s) do you have. One symptom of a clogged catalytic converter is loss of power. This is because the exhaust system is restricted. HTH. -Jim

111,105

Normally if you had a bad sensor you woukd get a check engine light...but I have seen cars with bad o2 sensor not able to get up to speed

1 of 1 people found this helpful.

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