In nearly all cases, the P3 V3 Gauge will not be affected by modifications or a re-flashed ECU. The function of our P3 Analog Gauge is not affected by any tunes or modifications in any way. “Piggy-back” style tunes that intercept sensors, can make the boost readings in the ECU appear lower than the actual value because the tune is “lying” to the ECU. In these cases our Analog boost sensor can be easily added to your P3 V3 Gauge to keep an accurate boost reading.