1. A method of controlling the operation of an internal combustion engine having at least one cylinder, each cylinder having
an associated intake valve and an associated exhaust valve, the method comprising:
directing skip fire operation of the engine;
determining whether an exhaust valve actuation failure has occurred in which the exhaust valve associated with a selected
cylinder fails to open properly during a selected working cycle during the skip fire operation of the engine; and
when it is determined that an exhaust valve actuation failure has occurred, deactivating the intake valve associated with
the selected cylinder during a subsequent working cycle in which the intake valve would otherwise have been actuated in response
to the detection of the exhaust valve actuation failure.