P1818 — Transmission 4-Wheel Drive Mode Select Open Circuit

What it means

P1818 is an OBD-II diagnostic trouble code: Transmission 4-Wheel Drive Mode Select Open Circuit.

Typical fix

Confirm the code with an OBD-II scanner, then inspect the component or circuit named above. Consult a vehicle-specific service manual for the full diagnostic and repair procedure.

Sources

https://github.com/mytrile/obd-trouble-codes