1. insufficient power: etc battery will automatically discharge. if the car is parked in a place without light for a long time, the battery can't be charged and the electronic tag can't be started.

2. The electronic tag falls off: ETC has anti-disassembly function. If the electronic tag falls off during driving, it will be locked and needs to be reactivated before it can continue to be used;

3. Too fast: If the car travels too fast, the equipment will not be able to read the ETC information when passing through the ETC channel;

4. insufficient account balance: if the bank card account balance bound by ETC is insufficient, or the credit card is not repaid, ETC deduction will be unsuccessful, which will affect the use.

The methods to deal with the inability of etc to sense are as follows:

1. Do not drive too fast through the ETC lane;

2. Check whether the etc equipment is loose or detached by itself, which causes the tamper-proof switch to pop up, and all data need to be reset;

3. charge etc equipment;

4. Check whether it is the etc card of the vehicle.

the installation method of etc is as follows:

1. check whether the etc card and obu are damaged, press the anti-disassembly button of obu, the red light will light up briefly, and the words please insert the card will be displayed on the oled screen, indicating that the equipment is normal;

2. Clean the front windshield, keep the glass surface dry, tear off the obu adhesive protective film, stick it to the installation position, and press it by hand for 2 to 3 minutes;

3. Put the etc card with the front facing the driver and the back facing the front glass, and insert the chip into the device.