I finally crawled under it today, and there are three catalytic converters (two mini ones plus the normal one) and four O2 sensors, like this:



Gee thanks, Ma Mopar.

Does anyone else have non-California vehicles with California emissions? Are all 2001s like this? Can it be replaced with a normal one cat / two O2 sensor setup, or would the PCM get confused?

Also, I have two codes for one of the O2 sensors:

Is "Bank 1 Sensor 1" the pre-cat driver-side O2 sensor?

 

Yes, left bank pre-cat sensor. At least it should be an easy fix. Don't use Bosch though, lots of people have issues with them.

You have Northeast Emissions. Basically we, I'm in MA, use their stricter requirements. I think it is just ME, MA, NY, and VT that follow this.

Hope it helps.

 

Thanks. How long has this "northeast emissions" been in effect, and is it mandatory for new vehicles being sold in the states you mentioned (I can't find any useful information about it on Google)? Maine doesn't even have emissions testing (except in Portland); it is ridiculous that they signed onto this foolishness.

I decided to order both pre-cat O2 sensors (not Bosch; NTK) and replace them both at once:

• NTK Part # 23137 Left; Pre-Cat (Upstream)
• NTK Part # 23135 Right; Pre-Cat (Upstream)

I've heard that they are hard to remove because they rust in place.

 

This will give you a little more on the emissions stuff.

http://www.epa.gov/otaq/cert/ststatus.pdf

I meant more along the lines, you know what is wrong. Both codes for the same sensor. Yes, they can be a bit tough to remove. You might soak it for a bit with some PB blaster. They do make a socket for the sensors that'll help.

 

Thanks for the link. It looks like I got "lucky", in that my vehicle is in the "LDV/LDT Vehicle Class", and 2001 was the first year they required it (which is the same year as my truck), and only for that vehicle class at that time.

I should have looked for a 2000. Not only would I have avoided the absurd CA-type emissions, but I would have also avoided the electronic-shift 4WD (I much prefer a mechanical-shift transfer case).

Yes, that's true. I hope it solves my problem which I've described elsewhere, but I'll paste it here too:

I think I'd rather use a box wrench (preferably with a 6-point head) and cut the old O2 sensor wires for access. I'd rather hammer on something like that than on a ratchet with a deep-well socket (because it can transmit the force of the hammer inline instead of through an L-shape, plus there is no ratcheting mechanism to worry about damaging). I'll probably have to do some heating of the threads in the exhaust with a propane torch too.

 

lol canada is pretty good for emissions. as long as you got a cat and a muffler ur good to go! all i have have is a universal cat, 2 O2 sensors, and a muffler and i pass easily

 

Up until a few years ago, you could easily pass inspection here without a catalytic converter at all. Technically a vehicle had to have one if it was manufactured after a certain year, but there was no requirement for the inspection stations to look for one; nor even look underneath at all. They checked lights, wipers, parking brake, and front-end components (e.g. ball joints), and that was it.

As of '06 or '07, they have been required to actually put the vehicle on a lift and check underneath with a light. This is mainly to check brake lines and rust that would compromise structural integrity, but they would almost certainly notice a missing catalytic converter in the process.

However, if I replaced my setup with a normal two O2 sensors / one catalytic converter setup, no inspection station would care. The only thing that prevents me from doing so is that I think the truck's PCM would take its ball and go home.

 

Both my Dakota had the same set up. One was originally from CT the other MA.