Jack Car Up To Do Sensor?

[pmacFTO]

I got my replacement Lambda sensor in the post today and was getting a mechanic m8 to do it but he's let me down - I know it just screws in one end and plugs in to the grey plug just at the drivers side of the car and I did do a few sensors on my previous FTOs so I think I'll try this one too!

The question is - do I do it from underneath the car, removing the plastic undertray I assume, or can it be done from above if you remove a few things?

The bracket on it had snapped and the cable was swinging loose but the place I got the replacement one (2nd hand subaru genuine part) from also has the bracket included Will I need to give the nut a spray with WD40 in the morning before I try to remove it in the afternoon?

Also - will the CEL light go off after a few starts and drives (i.e. self diagnostic) when I fit a working sensor or does it need cleared?

TIA for any help - I have Hypertech on standby to fit it on Saturday if I get stuck tho! These things are never as simple as I think they will be!

Edited August 21, 2008 by pmacFTO

[RS Grant]

Pretty sure you're gonna be better going from underneath as IIRC the lambda isn't at the top of the downpipe like it is on the Classics.

Cheers,

Grant

[scoobymark]

done mine recently and you are best to change the sensor from underneath, i did'nt jack the car up, i just turned the wheels to the right and got in that way.

it is a bit fiddly especially as the wire keeps turning when you are tightening the sensor, but fairly easy job.

I have a secs monitor which can reset my ecu, so i cleared the fault that way, not sure if it will automatically reset, unless you disconnect the battery for a wee while then that should reset the ecu.

mark

[pmacFTO]

cheers guys - I think the newage ECU has to be reset - can't just take the battery off like the "olden days" when cars were easier lol

[speech]

I think, and this is only a "think", that the CEL light should go off after 4 restarts once the fault condition has been rectified - ie you have replaced the faulty sensor with a working one - however the fault code will remain logged in the ecu as a historical fault and will remain there until it has been cleared by a diagnostic tool of some description.