any good chip will be fine, the most important thing is the tuner who writes the chip should give you all the base settings ie fuel pressure, so you can check all is correct ,before you go hunting for sensor faults

though ,ect, and map sensor are favorites, ect just fails and reads cold all the time ,and the map sensor normaly gets wet and goes tits making the ecu think the engine is under load ,dumping loads more fuel in, aswell as poorly set up cars ,ie habing the fuel pressure wound up etc etc also cause major problems,

its worth getting a pro to set them up properly ,the car will perform better, drive better, and be soooo much better on fuel, not to mention having massuve impact on engine life