DTC P2544-86: Torque Management Request Input Signal A - Signal invalid: Action
- Using the manufacturer approved diagnostic system check and install latest relevant level of software to the transmission control module
- Using JLR approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new transmission control module. Using JLR approved diagnostic equipment, perform routine - Learn VIN (0x0404) - and - Reset Adaption Values (0x4013) -