Where do you find the ocv code P1656 on a 2002 Toyota corolla?

The OCV code P1656 on a 2002 Toyota Corolla is stored in the vehicle's electronic control unit (ECU). To access the ECU, you will need a diagnostic scanner. Once you have connected the scanner to the vehicle's diagnostic port, you can retrieve the trouble codes stored in the ECU. The P1656 code will be listed among the codes retrieved by the scanner.