Recently I threw a P0443 code for the purge valve circuit. Indicating that the P.V. circuit was open. I replaced the valve after checking connections. Light still on. Put Dielectric grease on all connections, P.V. and PCM connectors plus a new gas cap. Cleared codes and ran Trip 1 and Trip 2 with scanner passed. Left shop drove home (ran great) 16 miles. Got home and shut it down. Restarted and the light came on. I'm hoping not the PCM which is my last choice. Canister and vacuum lines are good. Any suggestions?

Dave Hoffman
99 Durango SLT 5.9, 4WD, N.P. 231, R46e

 

check the wires at purge valve to see if there is power on control wire and check for ground..also dialectric grease is non conductive and from exsperiance can cause issues with connecter pins

 

All connections are good, power and ground. Going to do a smoke test in the coming week to see if any vacuum leaks. PCM is the last option due to cost.