[ky0u]

Hi all,

I hooked my diagnostic/scan tool to my car and was looking at all the options that appeared under Coding. I had a question regarding power class. Mine lists Low, Mid, High as options.

i did a bunch of searches through e90post as well as several other bmw forums, but while it has been driven into my skull that this is only changeable within 10 hours, I could not find any explanation as to what the options here actually meant, just pages and posts about unmatched values in the dme can throw errors (2fa4?).

My Power Class is currently set to low. I'm if this is correct or if the value had been set this way for some reason.

(Just to clarify, this is NOT the speed limiter setting)

[rjahl]

Originally Posted by ky0u

Hi all,

I hooked my diagnostic/scan tool to my car and was looking at all the options that appeared under Coding. I had a question regarding power class. Mine lists Low, Mid, High as options.

i did a bunch of searches through e90post as well as several other bmw forums, but while it has been driven into my skull that this is only changeable within 10 hours, I could not find any explanation as to what the options here actually meant, just pages and posts about unmatched values in the dme can throw errors (2fa4?).

My Power Class is currently set to low. I'm if this is correct or if the value had been set this way for some reason.

(Just to clarify, this is NOT the speed limiter setting)

Its just one of the methods BMW uses to insure that you flash the correct calibration file into your DME. Your car has a powerclass stamp written into the CAS and the DME reads that against the powerclass stamp stored in the calibration file, If they don't match you get the error.

It's just a ID stamp, one byte value. It actually has no control over the power produced by a particular calibration file or tune.

[ky0u]

Originally Posted by rjahl

Its just one of the methods BMW uses to insure that you flash the correct calibration file into your DME. Your car has a powerclass stamp written into the CAS and the DME reads that against the powerclass stamp stored in the calibration file, If they don't match you get the error.

It's just a ID stamp, one byte value. It actually has no control over the power produced by a particular calibration file or tune.

Got it, thanks! That clears up my main concern, wasn't sure if the value also imposed some sort of restriction

[Levanime]

power class is written in dme, cas and flash

all three should match