P1837 — Transmission Transfer Case Differential Lock-Up Solenoid Circuit Failure

What it means

P1837 is an OBD-II diagnostic trouble code: Transmission Transfer Case Differential Lock-Up Solenoid Circuit Failure.

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