C5 will not go into SD mode
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Staging Lane
Joined: Mar 2005
Posts: 85
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C5 will not go into SD mode I have a 99 C5 and when I unplug the MAS and set the MAS frequency fail to "0" I do not get a check engine light. The scanner will read 0.32 #/min of flow at all times. What am I doing wrong?
Originally Posted by trophystock
I have a 99 C5 and when I unplug the MAS and set the MAS frequency fail to "0" I do not get a check engine light. The scanner will read 0.32 #/min of flow at all times. What am I doing wrong?
In VCM Editor in the DTC display make sure you have your MAF DTC's (maf HI and Lo freqencies) set to report an error on 1'st error.
If you disable the MAF DTC's in the editor, you will not set them even if you set your maf fail to 0.
As long as your MAF DTC is set correctly to error on the 1'st error, you can set your MAF fail to 0 and don't even need to unplug it.
- Keith, HP Tuners
If you disable the MAF DTC's in the editor, you will not set them even if you set your maf fail to 0.
As long as your MAF DTC is set correctly to error on the 1'st error, you can set your MAF fail to 0 and don't even need to unplug it.
- Keith, HP Tuners
Originally Posted by trophystock
I assume I should see a check engine light right after I start the car up?
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I have found on a few cars that setting the fail to 0 doesn't work all the time. My best bet is what Keith suggested to a degree, unplug the MAF, keep everything else the same, except set the DTC to error on 1st attempt for codes P0101, P0102, P0103.
