hi,the engine management light has come on on my03 wrx so i have had it put on the comp at a local garage and the print out said RUNNING LEAN (bank 1).a friend said that bank 1 is the first silinder on the right as you look at the engine from the front of the car and said there might be a sensor gone!

does anyone know if this could be the problom and if so wots the sensor called?

cheers.......

 

bank 1 is drivers side

 

bttt

 

By Running lean do you mean a "misfire" which triggers the CEL light.

Posting the OBD II error code that the garage found would be helpful

Shaun

 

its not misfiring as far as i can tell.....

the fault code is.......... P0171 System Too Lean(bank 1)

cheers.

 

is it still on standard exhaust?

 

3in cat back milltek and got a 3in downpipe but not fitted yet due to the fault,as far as i no the rest is standard.

cheers

 

bttt

 

Unusual CEL... for a newage 03 WRX IMHO

I'd try and "borrow" a known working MAF and try that first .........only because The Lambda sensor and the fuel pump fail less often (just )



Tricky one


Shaun

 

when i first has the car put on the computer it came up with two faults.......

MASS AIR FLOW and SYSTEM TOO LEAN(BANK 1)

the garage said fit a new MAF because its causing one of the faults but could be cauing both.........

fitted a brand new MAF about a week ago the light stayed off for about 3hrs and then came back on!

when back to the garage an the SYSTEM TOO LEAN(BANK1) fault is still there

cheers for ur help...

 

bttt

 

bttt

 

bttt

 

whats the a/f correction reading?

 

sorry mate but whats a a/f correction reading?

cheers harri.

 

I dont want to sound offensive but do you have a cheap induction kit on it by any chance?

I had exactly the same problem on my bugeye, I changed the MAF sensor and but the original filter housing on and it was fine again

Andy

 

yeah it came with a cheapy induction kit on it,ive just fitted a new MAF so il try putting the stardard air box back on.that wont turn the light out tho wil it il av to av the ECU reset wont i?

thanks very much for ur help.......

 

possibly will have to reset but on the other hand a 5 min drive might put it right.

Now that you've said that I'm positive its the induction kit, you should have no probs after. If you want an induction kit I have found the Perrin one works fine without any CEL issues.

Let me know how it goes

Andy