Black_beast

Recently been having cel come on,, code 32 oxygen sensor., changed lamba still comes on,,

Now this will on come on say motorway driving in 5th gear,,

On country roads everyday driving light again will only come on when in 5th Normaly when going up a hill or again at speed,,

I can guarantee on my Normaly route to work at top this hill boom the light is on when in 5th just driving along.,

Iv gone up in 4th gear no problem no light driving down motorway keep it in 4th at speed no light,, I'm puzzled to what is causing this

Car is v4 jdm with uk lump in and was set up few months back

Car will sometimes start to idle slightly rough

Having doubts if it's maybe maf,, but not throwing up code

ossett2k2

iTrader: (9)

I think there are 2 sensors on the exhaust,one in the downpipe and one in the mid section. There definatly is 2 sensors on my v3 jdm

Gambit

iTrader: (6)

I used to get that on my99 uk turbo, exact same thing, its just the sensor overheating as you are labouring in 5th up the hill. That was on std cat and std ecu

Strangely it never occured when i fitted the prodrive ecu & a sport cat.

ossett2k2

iTrader: (9)

I'm not sure which code throws up but this pic I have found show 2 oxygen sensors

Black_beast

I changed one in downpipe on top, car is decat and don't think Iv ever seen sensor underneath

ossett2k2

iTrader: (9)

Ah will have been removed if decat I suppose. Mine still has both cats so has both sensors. Hoping to decat mine in the future so will be interesting to find out if I would just bin the mid pipe sensor?

Gambit

iTrader: (6)

Thats a newage in that pic.

Classic only has 1 sensor in the downpipe. It location varies. Its at the top of downpipe from my98-00 and towards bottom on earlier. And even if it was a decat the sensor remains fitted

Black_beast

So only have one lamba on the downpipe then?

Gambit

iTrader: (6)

Yes

ossett2k2

iTrader: (9)

Mine is a 97 wrx and had a big sensor in front pipe and small sensor in mid pipe. It definatly has 2 sensors tho. I will have to do some more reading

ossett2k2

iTrader: (9)

What I thought is that the front oxygen sensor it the one that is used for afr adjustments and the rear/mid sensor monitors o2 levels?

madscoob

iTrader: (3)

front sensor in uppipe or down pipe is 02sensor the one further back is the egt sensor

ossett2k2

iTrader: (9)

Cheers
That clears it up nicely

Black_beast

Cheers I put the engine in few months ago and cant remember any sensor on manifold or up pipe tho

madscoob

iTrader: (3)

i had the same problem as you 60-80mph in 5th allways uphill. it's the begining of the end for the 02 sensor it's on ot's way out, there is a good video on you tube as to how to test them using a vice blow torch and a multi meter

Black_beast

Just put new Bosch 02sensor in tho

ossett2k2

iTrader: (9)

Have you done an ecu reset with the black and green plugs? This will clear any fault codes. I'm not saying this will work but worth a try.

Black_beast

Yeah tryed that,, as soon as u start driving for little run it throws it straight up,, don't even have be in 5th or on boost or at speed

madscoob

iTrader: (3)

is it the multi fitment version ? the one with a black plug which you have to wire up yourself

ossett2k2

iTrader: (9)

Just a thought but if the car is now decat and hasn't had a remap then maybe on low load driving like 5th gear cruising there maybe over fuleling causing a rich mixture and throwing a error code?
I'm going to buy a wideband lambda and afr gauge before I start mapping mine because they are far more accurate than the standard narrow band ones