ive just spent the last 2 hours reading past posts about this and im needing some confirmation before i spend days fault finding.

 

90% of the time after a good blast the Ecu returns all clear, but on occasion while driving along i get the heavy fueling smell and before ive gone to check Ecu codes i know its registered a 33 and evry time im right. So i reset Ecu and for a few days its fine until it registers another 33. If i where to check the sensor is switching with a multimeter or Ecu light it will be doing as its only happening on occasion?

 

My only option is to change it out for a known working one or new?

 

What actually brings up the code 33? is the Ecu likely to be reading a sensor which is on its way out..

 

cheers

 

James

Code 33 does indicate a faulty o2 sensor, sounds like yours is on its way out. My drivers side o2 sensor went faulty the other day (using datascan I could see it was dead and also recorded a code), then a few days later checked again and it was working - datascan told me I had started the car 17 times since without that fault.

So yes only option is to swap them out for new ones, but 1st just check the connections to the loom and make sure they are clean and secure.

 

Mr F of MJP on here does pattern replacement o2 sensors for £42 with the correct plug....

 

http://www.300zx.co.uk/forums/showthread.php?t=140292

 

He will also source you the genuine ones if you want, but they are a lot more. Don't go 2nd hand.

 

FYI code 33 is indicating a faulty LH sensor, code 53 is for RH sensor.

Edited September 2, 201015 yr by turbocraigy

Thanks for that buddy, that helps alot!! i will replace with a new one asap..

 

james:thumbup: