alvinaudi

I got fault code 17545 Fuel trim:Bank 1 (Add): System too rich, P1137-002 Lower limit exceeded!
Mine is 02 A4 2.0 cvt and I got this a few months ago. Everytime when I cleared this with VC it keep comming back around a few hundreds km! I did tried to go thru the Basic Setting Block 002,030,031,034,036,037,043,046 as well as the Readiness. ALL info are within spec! The only not so normal is the Block 032 which gave -7% and -5.6% and I think the -7% is a bit low. Is the fault come from this -7% when this go further down?? I really need some inputs from well experienced Audi Owners to help me out with this. Thank you so much and hoped to here your helpful replies soon.

x1rider

mine was due to a faulty MAF sensor (over-oiled air filter screwed up my MAF sensor). After replacing the MAF sensor, it never came back.

alvinaudi

May I ask is the MAF sensor give bad reading thru VC or just oilly look when you replace it? Mine give normal reading by VC and no fault code about the MAF sensor whatsoever! By the way if this sensor die, will this generate a fault code when I scan with VC?? One more question, will the N80 valve related to this? Thanks for the help...

x1rider

and the car was in limp mode.

alvinaudi

Thanks for the help and I better start to look for a new one....