[Feral]

The computer cannot store codes with any aftermarket chip installed, Ive tried it with 3 different style chips and purposely faulted the car by disconnecting the DPFE sensor... each time the chips were installed it wouldn't throw a check engine, I removed the chip's and they threw codes immediately..

I also diagnosed a fellow FC.net members car and he was chipped which didn't throw a code and error'd out my reader(at first I thought his OBDII was dead and I asked if he modified the ECU or had a chip and he said oh yeah it has a diablo chip), less then a day later after pulling the chip the car threw the code I was looking for..