catalytic converter & oxygen sensor ?

[glen_ep Addicted PP Member Find all posts View Profile Close glen_ep]

I've been trying to confirm whether my 2001 model came with either of these, and have come to the conclusion that it did not. Below is the information I've found regarding Australian models. Happy to hear from other 95 owners and what they've found on their vehicle.

Clues from online forums:
- They're classified as light commercials, as such did not require a cat prior to 2000. From 2000 all vehicles required cats. *STRANGE - mine is 2001 but doesn't seem to have one.
- The stock exhaust system has 1 muffler and 2 resonators. The first resonator is immediately after the Y junction - where one would usually expect a cat.

Clues from shops:
- Called an exhaust shop, they looked up the model and couldn't see anything in their system about a cat or o2 sensor. Suggested some vehicles did not come with a cat due to light chimerical vehicle standards.
- Called Toyota parts, Penrith, they looked up the diagram for my VIN and couldn't see anything in their system about a cat.
- Called Toyota parts, Chatswood, they looked up the diagram for my VIN and confirmed it does not have an Oxygen Sensor, and said there doesn't seem to be a cat.

Clues form online sources:
- Prado 120 series diagram clearly shows O2 sensor (full part number) and catalytic convertor:
http://www.toyodiy.com/parts/p_G_200...PEKQ_8401.html
http://www.toyodiy.com/parts/p_G_200...PEKQ_1702.html
- Prado 90 series diagram shows O2 sensor as not applicable (without specific part number) and no mention of catalytic convertor:
http://www.toyodiy.com/parts/p_G_200...PNKQ_8401.html
http://www.toyodiy.com/parts/p_G_200...PNKQ_1702.html

Image of my exhaust system along side some aftermarket ones (Pacemaker):



Now, assuming this vehicle doesn't have an O2 sensor, but assuming the computer is prepared for it, I wonder if installing one could provide better fuel economy?

[Leethal Advanced Member Find all posts View Profile Close Leethal]

Glen,

As I understand it you are correct that the 90 series was not required to have a cat fitted as they were/are classed as "commercial" from memory due to having a separate chassis.

I would be amazed if the engine ecu would recognise any signal imputs from an O2 sensor. If the ecu was capable of reading an O2 sensor signal it would have a constant Fault Code when it was not receiving an O2 sensor signal.
If it did it would definitely be worth fitting one.

Lee

[Steve M Addicted PP Member Find all posts View Profile Close Steve M]

Mine didn't have either of them Glenn on my petrol 90, how ever my 120 V6 has both oxygen sensor either side and also a cat either side. I don't think it would be worth the hassle of trying to put one in. I had one put into the 90 when they did the gas system but the LPG ran off its own computer... It didn't effect the petrol but, so cant comment but I certainly wasn't getting any better running gas with the sensor compared to other prados running LPG without the sensor...Just a bit of bullshit sales crap I was told I reckon hen I had it converted to LPG, pain in the arse personally. Wouldn't have it again.....my 90 was a 96 mode;l though, and my mates was a 2001 and he didn't have either of them...Cheers Steve

[glen_ep Addicted PP Member Find all posts View Profile Close glen_ep]

Thanks for the input guys

[Steevo Member Find all posts View Profile Close Steevo]

Mine is a 2000 model so mine would not have one, yes?. I'm about to put a new system on as just had service done and mech reckons exhaust is blocked, when getting quotes they ask has it got a cat and my reply, buggered if I know!. How do you tell whether that first muffler is a cat or muffler?