Some 2009-2011 Lincoln MKZ vehicles built on or before 3-4-2011 may exhibit a leaking or stuck underhood evaporative emission purge valve. This fault will turn on the MIL and set DTC P144A, P2196, P2198 and/or P1A0C.
Remove the evaporative emission canister. Inspect the canister for liquid fuel by turning the canister over and watching for signs of liquid fuel exiting the canister.
If fuel is present, replace the canister and purge valve.
Purge valve……P/N 9U5Z-9C915-H (except hybrid)
Purge valve…....P/N 9U5Z-915-BE (hybrid)