Im pretty sure my o2 sensor is on its way out. Although im still getting 600ks of highway driving and around 350ks for "city" driving. It used to be about 100ks more on both parts and the car seems less responsive and powerfull.
Are these signs of a bad o2?
Also my cat gets quite hot. Is this caused by a bad o2.
What's a o2 sensor worth and are there different types, like there is with thermostats.
One more. Can a bad o2 cause pinging?
Seems my car only pings at night now. Weird.

Thanks.

o2 sensors are about $40 - $120 depending on what brand

http://cgi.ebay.com.au/OXYGEN-SENSOR-O2 ... 20aed9bf4f

http://cgi.ebay.com.au/OXYGEN-OXY-O2-SE ... 45ecccbb8c

Sweet thanks guys.
My cars got 188xxx on her and no record in the log book of a new o2 sensor so I assume it hasn't been done. I've heard if the engine is well looked after (babied) they can last the life of the engine. But since im a p plater spirited driving is in my blood haha.
Have to get 60bucks then. Wich sucks cos id have the money but a oversized truck in the fast lane going 80 decided to go offroad and shower my windscreen in rocks. F**k.

Still sounds excessive. Had s**t economy on my AU XR6 bout 350-400 km when i got it. Did full service inc fuel filter, new pump ($90), new oxy sensor ($80), plugs ($116), leads ($80), subaru top end cleaner ($16), cleaned injectors ($180) all just for piece of mind. Now get 500-550km easy with a bit of a boot full now and then. Definately worth it. Round 650 if only on the freeway

A dodgy O2 sensor will show up on your computer fault codes.

Could it be a difference between the eb and ef-el.
I also have a noisy as injector.
Where is the code light on these cars.
Do these ones have a led code light?
Or do you need a diagnostics?
My mate in his efxr6 gets about the same as me.

where do you guys change gears? Like. What's normal driving. I might be driving harder then I think.
I change at 2500-3000 usually. Too high.?