Mine was a problem with the Upsolute chip. The jack off that did the chip here locally had no idea what he was doing. I sent it back to Renee at Upsolute and have had no problems since.

 

I have a GIAC

 

When I put in my EVO V-flow, I neglected to re-attach the wire to the MAF sensor.

Started car, ran fine, but got the ABS and PSM lights, but no cell. I shut it off, opened the lid, and discovered my omission. Reattached the wire, restarted it, both lights still on. I Drove it around the block. Ran fine. Shut it down for 5 minutes. Checked everything else again, found no other issues.

Restarted it, no lights or cells, ran perfect. I'm certainly no P expert, but the same lights, no cell, etc. seems to point to the MAF.

 

The dealer checked and I had blown off the turbo hose from the intercooler endtank.