P1640 HYUNDAI - Main Relay Malfunction
- Faulty Main Relay
- Main Relay harness is open or shorted
- Main Relay circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
Need more help?
Do you need more help with the P1640 Hyundai code? Ask a question to our users or find an automotive repair shop near you to help fix the OBDII code