Billet

iTrader: (60)

Hi all, I have a 2005 STI and recently my EML kept coming on and when i had it checked it, the code was for the lambda sensor, bank 1 sensor 1, which looking at other threads, i assume is the front one.

I have had the code cleared and it comes back on within 5 seconds, so it's goosed.

My question was can i fit a rear lambda to the front or are they different?

Also, how would a faulty lambda affect the car, i read somewhere that it puts the car back on a base map, is this true?

Thanks

Myles

iTrader: (40)

Right, this is the way I understand it. I get the code bank 1 too rich, which equates to the front lambda. The output from this sensor affects how the fuelling is done under say 2.5k revs, and could cause the car to be stuttery at low revs, perhaps try to cut out (after ruling MAF out) and in my case, run rich. Above the 2.5 or so k revs, the map does the fuelling.
The front and back sensors are different and cannot be interchanged. Also, cutting corners with a cheap lambda sensor is no good eithger so I have been advices.

If you have a multimeter, you can check if the sensor is U/S by following the instructions in the following link.

http://www.scoobymods.com/showthread...ent-12146.html

PS Your map is safe, although if you reset your ECU, it will reset all the 'learnt' parameters that the ECU builds up over the miles to draw a picture of fuel type, 'driving style', and all the other little details it requires to accurately fuel the car and have it driving most efficiently.

Baz82

Wiring should be different for both lambda's.

Here's a link to a new genuine one

http://www.importcarparts.co.uk/part...gen=&searchKey=

Denso one

http://www.importcarparts.co.uk/part...gen=&searchKey=

Symtoms would be bad fuel economy

Billet

iTrader: (60)

Thanks for that lads.
I had a spare rear one but they're different, so it's useless.
I'll be buying a bosch one which are very well priced and are very well made too.

I've read one of split pin's old post where he told someone to disconnect the lambda plug immediately after an ECU reset and take it for a drive to see if it was smoother. Is this ok for a newage too as he recommended it to a classic owner?

Black Widow

iTrader: (2)

Here you go.

http://www.worldcarparts.co.uk/tabid...S/Default.aspx

Billet

iTrader: (60)

Cheers mark

Midlife......

iTrader: (2)

The DENSO ECU doesn't like non OEM front Lambda's as they act as a pseudo wideband jobby....

Shaun

DonNedly

iTrader: (10)

i definitely recommend getting one from world car parts. They are oem and will work.

It is fine to run with front lambda disconnected for a while if you need to as it will use the fuel map. You just won't get very good mileage. However if the sesnor is faulty the fueling could be all over the place but it is only used for warm idle and cruising.

Billet

iTrader: (60)

Ok, cool.

Thanks to everyone who posted.