8V Precision Gauge Installation Guide
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Troubleshooting
If the gauge is stuck, try replugging the OBD or flicking the switch on/off on the OBD extender cable — whichever is more convenient.
Make sure no external devices such as phones are connected to OBD_WIFI or similar nearby networks.
If the gauge still shows 0.0 or appears frozen, try driving the vehicle for a short period. The gauge should reconnect and readapt automatically.
If the gauge remains on after turning the car off, this is completely normal.
The unit enters a timed sleep cycle and powers down automatically after approximately 20 minutes.
It will not drain your battery.