basically you have zeroed out the readliness check and thats it. You'll have to zero out also error classes. BUT if this DTC forces ecu into soft limp then you're out of luck, because zeroeing out error class doesn't remove it's effects only DTC itselft

That's because 7CD1 and 7CD0 are map addresses for me3.8.2 (clemens file), they will be in a different address on m5.9.2.

Try this addresses, 77C5 and 77C4. I "think" this are the addresses that correspond to the 7CD1 and 7CD0.

77C5 (5.9.2) has a value of 01 = 7CD1 (3.8.2) has 00.
77C4 (5.9.2) and 7CD0 (3.8.2) both have 01 values.

**** Please use this addresses with caution, I haven't tried them, mainly because my CEL light is unplugged lol ****


In my AEB (557P and 557N) unplugging both o2 sensors would only zero out fuel trims, no change to fuel or ignition timing. So no soft limp.

77c4 is a 23 already and  77c5 is a 00

my file is a 8d0907558m


i also have a 8d0907557p but everytime i try to write it gives me security access denied any idea?

the 557p file i have is the same as the 558m file at these locations 77c4 is a 23 already and  77c5 is a 00

i honestly couldnt tell you i dont think i went past 110mph in it lol

Immobilizer?

Did you try flashing it off the car. (ie. plugged directly to the MPPS and an external 12v source). If that doesn't work, either your ecu is busted or your MPPS is old or doesn't work right.

Mine writes just fine using MPPS v12 via obd.

Currently using a 557N ECU with a 557P file written on it. So far so good @30psi/8000rpm.