That code refers to a malfunction in the Exhaust Valve Control mechanism, and it can be the result of sludge build-up in the engine. What can you tell us about her maintenance schedule, in terms of both odometer mileage and elapsed time?
The elapsed time factor can be very important, because cars that get mostly local short-trip usage, and which therefore accumulate miles slowly, are prone to sludging if the oil isn’t changed at least every 6 months–preferably every 4 months.