on my 2000 I disconnect the positive battery cable and press down the brake pedal for 30 seconds and that will reset it
Disconnect the battery and wait about five minutes.
This can be done with a scan tool or by unhooking the battery for a minute.
If the battery was dead or disconnected all trouble codes will be erased.
Either use a scan tool or unhook the battery for a minute.
Check the codes with an OBD2 scan tool.
Plug in a scan tool.
Error codes on a 1997 Mercury Villager can be found by connecting an OBDII code reader to the diagnostic port. The service manual has a full list of error codes and their causes.
Perhaps there are no codes set to read.
Not without a specialized scan tool.
Try disconnecting the + battery cable for 5 minutes.
Try disconnecting the battery for 20 minutes then reconnect.
No, you can't clear codes on any vehicle by disconnecting the battery. Thet are stored in the ECM and are still there when you re-connect the battery.