Air Fuel adaptation error on Peake tool

S62M5 · 24th November 2007, 18:24

I get AF - Air fuel adaptation on CYl 5-8 when checked with peake tool, is this related to a fautly MAF sensor?

thanks in advance for your input

mottati · 24th November 2007, 20:30

it can be. Have you already cleared it and has it returned? You could also try swapping mafs right to left and see if the code follows it. one last thing is to try the mafs test as outlined by member DavidS (i think that's in the faqs)

verhagke · 26th November 2007, 19:16

good advice. Also, it may end up being a pre-cat oxygen sensor which requires replacement.

S62M5 · 26th November 2007, 21:01

Quote:

Originally Posted by verhagke

good advice. Also, it may end up being a pre-cat oxygen sensor which requires replacement.

i do actually get the pre cat oxygen sensor error too. i guess i should change it first and try and see if this error comes back again. the oxygen sensor error has come back a few times now.

S62M5 · 26th November 2007, 21:04

the oxygen sensor would be
REGULATING LAMBDA PROBE 11781742050

correct???

UkraineE39 · 25th August 2009, 04:30

S62M5 , did you fix the problem? what did it end up costing you? Thanks in advance , also was it code AE and code 90 on the peake tool?

S62M5 · 25th August 2009, 05:36

Quote:

Originally Posted by UkraineE39

S62M5 , did you fix the problem? what did it end up costing you? Thanks in advance , also was it code AE and code 90 on the peake tool?

in my case it was the pre cat O2 sensor, i replaced it with a brand new one. that took care of it. cheers

UkraineE39 · 25th August 2009, 17:26

were you getting codes AE and 90 on your peake tool, s62?

wilsodh · 25th August 2009, 17:38

Quote:

Originally Posted by UkraineE39

were you getting codes AE and 90 on your peake tool, s62?

There's a report somewhere that 'fuel control' codes can be triggered by a tired pre-cat sensor. I'm guessing that 'fuel control' can refer to both direct delivery of fuel (injector/fuel pump), as well as a confused ECU due to a lazy pre-cat sensor.

Dave

S62M5 · 25th August 2009, 17:39

Quote:

Originally Posted by UkraineE39

were you getting codes AE and 90 on your peake tool, s62?

i dont remember the code since it was 2 yrs ago, but the code description was "AF - Air fuel adaptation on CYl 5-8".