I have a 2010 Cadillac CTS that has has an issue with stabilitrac error which causes the engine power to be cut. Have have the ECU changed as well as wheel sensor. It goes away and comes back again. This have been going on for 7 years. This winter it occurred many time but I was so fustrated with our dealer I just kept a OBD2 tool to rest codes and continue on. Recently I got a notice that a known MAF senson may cause similar symptons and to go to gm dealer to have them fix this. The dealer did not find any error codes so indicated nothing was wrong and would not change the MAF senson and charged me $130 for testing ? ??? . I however have a scan of the MAF sensor ouput and it seems to produce spike every 8 to 10 seconds where it goes from average of 4.2 to 6.6 and then to 2.8 g/s so basically it's not a steady line but spiking between 8 to 2.5 g/ s. And you have feel this in the car as vibrations/shudder. Is this normal?
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