Question about 2003 Toyota Tacoma
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Posted on Jan 02, 2017
SOURCE: Upstream O2 sensor location?
That is the first sensor closest to the engine. The downstream sensor is the one behind the converter.
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Posted on Aug 31, 2008
i find most o2 problems aren't o2 problems they are fuel delivery problems like partly plugged fuel filters or temp sensors or dirty air filters the worst ones are bad catalytic converters that is always last resort
Posted on Mar 12, 2010
An O2 sensor code is a tricky one. It could mean SEVERAL different things, and I know how bad it sucks to hear this, but your best bet is to take it in and have a diagnostic ran on it at either a dealer or a good mechanic shop with a computer they can hook up to it. I had an "O2" code come up a while back on another car I used to have, and literally spent weeks and hundreds of dollars trying to fix it, and never did. Finally out of desperation took it in, paid the $90, and they found the problem and fixed it in like 30 minutes. Something I would have never even thought of was causing it (can't remember off the top of my head). After that I stopped wating time and money on check engine lights. One comes on in my car, I take it to have it ran for free at and auto parts store just to make sure it's not a loose gas cap or something, just to get an idea of what I'm looking at, then go and make an appointment to have to hooked up to a diagnostic computer to track down the problem. Good luck, and hope this helps save you some time and money.
Posted on Apr 05, 2010
According to the service literature I read, the 2003 Montero Sport with the 3.0 or 3.5 L engine does not have O2 sensors listed even in the maintenance schedule. The 2.4 L engine has it on the exhaust manifold though.
However, the following lists the par, though for before or after the catalytic converter:
I think that $250 to $300 is reasonable if the Oxygen sensors are stuck in there with rust and the threads are preserved by the technician. Oxygen Sensor replacement can be tricky.
Good luck on this repair.
REMOVAL & INSTALLATION
Wait at least 90 seconds after the negative
battery cable is disconnected to prevent possible deployment of the air bag.
M10 mounting bolts 36 ft. lbs. (49 Nm). starting from the middle and working
3.0L and 3.5L Engines
flatness and/or damage.
3.0L engines and 22 ft. lbs. (29 Nm) on 3.5L engines.
Posted on Oct 07, 2010
Testimonial: "Thanks, it gave me some assurances the work was reasonable. I am pretty handy, this would have been new territory. Others made it sound VERY simple."
SOURCE: where is 2003 avalon o2
Hi, the sensor is on the front exhaust manifold. Here is a picture of the sensor you need to replace.....
You should be able to replace it yourself.
Posted on May 31, 2011
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