Lambda Sensor Confusion, Cant Figure Out Which To Buy

[csaba]

Hi everyone

as a last cry out i write here, trying to find out which denso sensors to buy for my car

even http://www.denso-am.co.uk/e-catalogue/

gives me wrong infos and even more confuses me about my engine

car is avensis 2.0 vvt-i avensis first registered 30.05.2003 which should be the 1AZ-FSE

i need all four sensor according to the system diagnostic

fuel consumption is high

revs is low, stalling, shaking

what would you recommend me?

Thank you

[csaba]

anyone please....

[Konrad C]

Welcome Csaba.

Can I assume you have the mk2 shape that went from 2003 to 2008, and what gearbox - manual or auto?

I looked at your post a few days back, but not having experienced the engine personally, left it to others to answer. I do a little digging.

Using Euro car parts as an example ( you can try the sister company Carparts4less), they supply the sensors at reasonable price.

http://www.eurocarparts.com/lambda-sensor

Some more information

http://www.japan-parts.eu/toyota/eu/2003/avensis/azt250r-aemghw/3_273550_019_223W/electrical/8401_switch-relay-computer/1

http://www.denso-am.co.uk/media/102388/dels14-0001.pdf

I notice that the Denso catalogue and Eurocarparts catalogue show quite a few part numbers for the pre-cat sensors. The post cats are the same.

If the diagnostic is showing issues with all the O2 sensors, I wonder is the cats are working properly. The sensors can be tested by resistance and an oscilloscope, but this need somebody who knows how to do this. The resistance check is a bit easier.

I also wonder if all the cats are working properly? Maybe an emissions check help.

Konrad