Jeep Repair: diagnostics code p1494, powertrain control module, coolant temperature

Question
i have a jeep liberty sport and the check engine lite is on. i hade a check on it and it came up with code p1494. can you tell me what this code stands for.  thanks

Answer
P1494-LEAK DETECTION PUMP SW OR MECHANICAL FAULT
When Monitored and Set Condition:
P1494-LEAK DETECTION PUMP SW OR MECHANICAL FAULT
When Monitored: Immediately after a cold start, with battery/ambient temperature
between 40 deg. F and 90 deg. F and coolant temperature within 10 deg. F of battery/
ambient.
Set Condition: The state of the switch does not change when the solenoid is energized.
POSSIBLE CAUSES
VEHICLE HISTORY AND SERVICE BULLETIN INVESTIGATION
LDP SWITCH SENSE CIRCUIT SHORTED TO GROUND
WIRING HARNESS INTERMITTENT
LDP VACUUM SUPPLY
FAULTY LEAK DETECTION PUMP
LDP SWITCH SENSE CIRCUIT OPEN
POWERTRAIN CONTROL MODULE