AEM X Series Gauge not showing anything anymore. It has power and used to work perfectly other than an issue of when i would tune my headlights on it would turn off. But it would read and work as it was intended. Now it is blank but shows light when i press the mode or sel button. My car won’t stay on for more than a second since this happened. Any help would be appreciated i’m at a stand still right now. I just replaced the o2 sensor and no change.

 

My first guess is that the gauge isn't sending a reading to the ECU so (assuming the tune has some sort of O2 protection) the ECU is killing the car. A datalog would probably confirm that.

You might try unplugging the O2 sensor from the gauge which would cause the gauge to default to 14.7 and should at least get the car running. This would likely cause any O2 corrections to freak out though, so it's not ideal in the long term.

Where do you have power/ground sourced from? If it's been glitchy with your headlights then I'd be suspicious of the power source.

 

i’ll try to run it without the gauge plugged in later tonight.

The power source is the main 12v from under the steering column, and the ground is on a bolt on the back of the head of the engine

which i need to run through all the wiring and see if there’s any issues with that