1st_runner
New member
I've got an 04' SR5 4x4 V6 and my O2 sensor is bad. Does anybody know if it's easy to change the O2 sensor or is it better to have the shop do it?
Lee
Lee
Anybody know about O2 sensors on 4th gens?
- Thread starter 1st_runner
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greasefingers
New member
It is probably the most unreliable sensor on any vehicle. I also believe the cost is covered since it is an emissions issue.
racefan_67
New member
the most difficult thing about this project is paying for the o2 sensor if it's not covered under warranty anymore...ridiculous what they charge for one....I ended up doing mine on a Saturday morning in about 30 minutes start to finish. It's worth having someone with the engine scanner set up to tell you exactly which one of the four that is no good anymore and then crawl underneath your truck with a socket set and a flathead screwdriver...(to unhook the snap wire connection)....ratchet out the old one and then carefully install the new one trying not to cross thread anything....it's almost like putting in a spark plug....good luck.
Mr. Lambdebois
New member
They are easy to change.
There is a special socket that has a slit down the side so you can put it on the ho2s and the wire does not get in the way.
Can you tell me what the DTC was? There is an acronym that will tell you exactly which 02 sensor is setting the code. (examples s1,s2, s1b2,s1b1, s2b2, s2b1 depending on the ehaust setup. S stands for sensor and b stands for bank. Sensor one is closest to the manifolds while sensor 2 will be after the cat. Bank one is always the drivers side and bank 2 is the passenger side of the exhaust. Hope this helps.
I could explain closed loop and open loop operation of the heated oxygen sensors and how they work as an input in a predictive system but I would probably just confuse you.
There is a special socket that has a slit down the side so you can put it on the ho2s and the wire does not get in the way.
Can you tell me what the DTC was? There is an acronym that will tell you exactly which 02 sensor is setting the code. (examples s1,s2, s1b2,s1b1, s2b2, s2b1 depending on the ehaust setup. S stands for sensor and b stands for bank. Sensor one is closest to the manifolds while sensor 2 will be after the cat. Bank one is always the drivers side and bank 2 is the passenger side of the exhaust. Hope this helps.
I could explain closed loop and open loop operation of the heated oxygen sensors and how they work as an input in a predictive system but I would probably just confuse you.
