Home >> Land Rover >> 2017 >> Discovery SE >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Diagnostic Trouble Code Index DTC: Transfer Case Control Module (TCCM) -- Discovery/L462 >> Diagnostic Trouble Code Index DTC: Transfer Case Control Module (TCCM) >> Description And Operation >> DTC P18A5-03: Motion/Position Sensor "A" Signal Circuit - FM (Frequency Modulated)/PWM (Pulse Width Modulated) failures >> Possible Causes