oange ss

iTrader: (50)

disonnected MAF for SD tuning but the SES light never came on, what does that mean ?

Red99TA

iTrader: (11)

I did the same thing but no light at first. After a start/stop cycle or two the light is now on. P0103 since I set the MAF fail freq. at zero.

TAQuickness

iTrader: (28)

the pcm waits for the MAF to fail x number of times before it trips the SES.

oange ss

iTrader: (50)

i drove around for about 1/2 an hour and it still didnt come on

LoWeLL216

iTrader: (1)

I'll bet it comes on the next time you start your car...

Red99TA

iTrader: (11)

I agree...shut her down then start it up and if there's still no SES then it will probably come on the 2nd time you shut it down then start it up again.

bshell

iTrader: (24)

PCM requires two consecutive failed ignition cycles before it will set the SES light.

SmokingWS6

iTrader: (1)

Its quicker, easier to set the MAF Fail Frequency to 0 and flash the pcm for SD tuning.

foff667

iTrader: (2)

yeah...i recommend setting it to 0 & unplugging the maf.

HumpinSS

iTrader: (1)

Also if you view your DTC's you may see 101-103 pending. That means the maf has failed and the car is in SD mode the light just hasnt come on yet

oange ss

iTrader: (50)

no codes in history, all readiness tests complete

foff667

iTrader: (2)

turn off the ses codes? meaning did you unmark the check box or set to 3 via hptuners if thats the software your using? im not sure exactly how efilive enables the ses...sounds like you messed that up or something.

Ragtop 99

iTrader: (7)

Why not leave it plugged in? Couldn't you can measure MAF airflow vs. Dynamic airflow and get a jump on dialing in the MAF while working on your VE table?

JRick212

iTrader: (6)

in order to dial in the VE properly you need to make sure that the engine is running completely off the VE table without the MAF interfering.

once you have the VE dialed in then you can reconnect the MAF and adjust maf

SmokingWS6

iTrader: (1)

Yep

Fail frequency has always worked for me. If its not I suspect the code has been turned off in your pcm file.

foff667

iTrader: (2)

Not saying you can't...I've heard of a few instances where for whatever reason the car didnt instantly drop into SD mode...the extra 12-15 seconds to get out of your car, pop your hood, unplug the maf and drop the hood isnt that much extra work to make sure its in SD as far as im concerned.

Ragtop 99

iTrader: (7)

I used the fail frequency = 0. I don't turn off the SES light so that I see that the error occurred.

jub jub

Some C5's incorporate the IAT sensor and MAF in the same connector so it isn't that easy.

soundengineer

iTrader: (16)

one major problem with doing it this way...
until your VE is dialed in perfect...then its not going to be accurate...
plain and simple... it used the VE to get its #'s for accuracy...
only way to correctly and accurately get the MAF is to use a wideband and use AFR error % to get it right