Home › Land Rover › 2020 › Discovery Sport Base › Repair and Diagnosis (Single Page) › Quick Lookups › Common Specs & Procedures › Diagnostic Trouble Code Index DTC: TELEMATIC Control Module (TCU) - Discovery Sport/L550 › Diagnostic Trouble Code Index - DTC: TELEMATIC Control Module (TCU) (G2153768) › Description And Operation › TELEMATIC Control Module (TCU) › DTC U201A-51: Control Module Main Calibration Data - Not programmed › Possible Causes