Ford
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    4x4 Low Switch Circuit Conditions
Cause:
    Key on or engine running and the PCM detected the 4x4 switch signal did not go low with switch on

Mazda
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    4x4 low range switch - switch error
Cause:
    Wiring, switch