I have a 2000 Dodge Durango with a 5.9 motor. I had a fault code of 1941, coolent relay trouble. I replaced the relay, temperature sensor, and electric fan. This left the PCM as the only thing to replace. So I get a company that sells PCM's and they get me a replacement. Now the new PCM fixed my first problem, but I now get a 1494 code, Leak Detection Pump (LDP) fault. My truck doesn't have a LDP pump in the emission system. Now the PCM is flashed with the vin number , for a 2000 durango, but my truck was build in 12/99, Does my truck have the 1999 emission system without the LDP?? Help!