AUSTRALIAN X-TRAIL FORUM :: Engine Mechanical :: O2 Sensor removal

Australian X-Trail Forum Engine Mechanical
O2 Sensor removal

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maxgmoore Profile
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X-TRAIL LEGEND

Date Registered: 11-2012
Location: Broome
TOTAL POSTS: 547

Re: O2 Sensor removal

Just changed the O2 sensor. Gee its a mission to get the spanner in there to undo it. Took me ages to figer out the right angle to do so. Just did the ECU reset and cleaned the MAF sensor too so lets hope the fuel economy gets better.

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Cheers
maxgmoore X-2776 (c)
My Ride
2003 Series 1 T30 Ti

18/Aug/2013, 6:59 pm

dmsantam Profile
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X-TRAIL NEWBIE

Date Registered: 10-2008
TOTAL POSTS: 8

Re: O2 Sensor removal

i changed my O2 sensor just over a year ago. got a bosch one from repco. bosch makes the stock nissan xtrail ones apparently. symptom was poor fuel mileage suddenly. it's usually the one closest to the engine that goes first.

you can't tell if the existing one is stuffed. i think these things give off a voltage when they don't detect oxygen (requesting more fuel from the ecu) and 0V when they do detect oxygen (less fuel for the ecu). so they constantly flip between 0V and +V in normal operation.

when you install it, follow the instructions with the wiring. it was pretty straight forward. You should have some anti-seize on the threads too. when you first start it up, the antiseize will smoke, so don't worry too much when you see smoke rising up! emoticon

over a year later, and mine is still working fine.

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2007 T30 Ti-L over 100K kms on the clock

2/Sep/2013, 3:34 pm

XTRAILBLAZER Profile
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Date Registered: 05-2015
Location: Rio de Janeiro
TOTAL POSTS: 42

Re: O2 Sensor removal

Hi Fellow Xy Fans,

Could anyone please enlighten me about what the O2 (letter "o" or zero ?) sensor is for ?
I presume it's nothing to do with the chemical expression for oxygen. Would be grateful.

Cheers,
BRIAN

28/Aug/2015, 4:46 am

dlpeek Profile
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X-TRAIL HOLIC

Date Registered: 12-2010
Location: Macquarie Fields SYDNEY
TOTAL POSTS: 1027

Re: O2 Sensor removal

Not being that mechanical minded I googled an answer.

Response:
The O2 sensor is mounted in the exhaust manifold to monitor how much unburned oxygen is in the exhaust as the exhaust exits the engine. Monitoring oxygen levels in the exhaust is a way of gauging the fuel mixture. It tells the computer if the fuel mixture is burning rich (less oxygen) or lean (more oxygen).

cheers

Last edited by dlpeek, 28/Aug/2015, 6:52 am

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Dave Peek
X-1756 (c)
2010 T31 ST-L (S2) CVT Precision Grey.
Tow Bar, bash plates, PEDDERS lift, YOKO GEO 15 AT/S tyres.

28/Aug/2015, 6:52 am