Ensure gauge has a 1TS sticker on the back of the gauge for the sensor to read correctly:
7 Color Series: GS-T706, GS-C706, GS-W706, GS-T707, GS-C707, GS-W707, GS-T712, GS-C712, GS-W712, GS-T722, GS-C722, GS-W722
10 Color Digital Series: GS-TCD06, GS-TCD07, GS-TCD12, GS-TCD-DT, GS-TCD-TP
Elite Series: GS-ET06, GS-EWT06, GS-ET07, GS-EWT07, GS-ET12, GS-EWT12
Tinted Series: GS-T06, GS-T07, GS-T12
3in1 Series: GS-3G-01, GS-3G-02, GS-3G-05, GS-3G-07