Help with 0664 code?
What should I do about a p0664 code? it says it is the manifold valve actuator. I have a 06 s type 3.0

The S-Type sedans are Jaguar's mid-priced ofering, falling in between the entry level X-Type and the flagship XJ sedans. Both the X-Type and S-Type Jaguar sedans are differentiated from the flagship XJ by their foundations. The two lower level sedans are Ford-based, while the XJ remains pure Jaguar. The S-Type is built atop Ford's former Lincoln LS platform, and shares many structural and mechanical similarities.
For 2006, the V-8 engine has been tweaked for slightly more power and a more advanced braking system has also been added. Bluetooth and satellite radio are added to the options roster.
The S-Type sedan has a unique and distinguished grille design, reminiscent of the Jaguar's classic designs. The S borrows many styling elements from the Jaguar Mark II sedan built in the 1960s.
The two model S-Type lineup begins with 3.0 liter V-6 version, which generates 235 horsepower. It comes equipped with leather, walnut trim, a moon roof, dual zone climate control, 17-inch wheels, and full power accessories.
A 4.2 liter V8-powered version is also available. This V-8, found in all the higher priced models, now produces 300 horsepower and 310 pound-feet of torque. This model receives sound system upgrade, xenon headlights, a navigation system, and an electric rear sun shade.
A six speed automatic transmission sends power to the rear wheels on both models.
What should I do about a p0664 code? it says it is the manifold valve actuator. I have a 06 s type 3.0
2006 jaguar s type v6 3.0. Was driving fine with no issues or warnings. Went into a store, came out, started the car and car just started running rough. Then got the performance restriction on the dash. Tried briefly to get it home but it wouldn't go over 10 mph. Stopped at a light and saw almost a steam like smoke coming from under the car. Immediately pulled over and got it towed. Had the car Scanned and only code that came up was p0300, which could possibly be anything minor to major. Things done (some needed anyway). Plugs Coils IMT o-rings Fuel filter Problem not solved. Car starts but runs very rough to the point once you let off the gas, car stalls. Will start right up again. Suggestions????
Air Conditioning
Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags · Rear side curtain airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel · Front brakes: ventilated disc · Rear brakes: ventilated disc
Comfort Features
Center console trim: wood · Dash trim: leather · Door trim: alloy · Floor Mat Material: carpet · Floor Mats: front · Shift knob trim: wood · Steering wheel trim: leather
Convenience Features
Adjustable pedals: power · Center console: front console with storage · Easy entry: power driver seat · Memorized settings: driver seat · Multi-function remote: keyless entry · Reading lights: front · Steering wheel: tilt and telescopic · Steering wheel mounted controls: cruise controls · Storage: seatback
Driver Seat
Adjustable lumbar support: power · Power adjustments: 8
Exterior Features
Grille color: chrome
Headrests
Front headrests: adjustable · Number of front headrests: 2
Instrumentation
Warnings and reminders: low fuel level
Lights
Exterior entry lights: security approach lamps · Headlights: Auto on/off
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Passenger Seat
Power adjustments: 6
Rear Seats
Type: split-bench
Roof
Moonroof: one-touch open/close
Safety
Active head restraints: driver · Parking sensors: front and rear
Seatbelts
Rear center seatbelt: 3-point
Seats
Driver seat power adjustments: reclining · Front seat type: sport bucket · Passenger seat power adjustments: height · Rear headrests: adjustable · Rear seat folding: split · Upholstery: leather
Spare Tire
Mount Location: inside
Suspension
Front Suspension Classification: independent · Front Suspension Type: double wishbones · Rear Suspension Classification: independent · Rear Suspension Type: double wishbone · Stabilizer bar(s): front
Telematics
Phone wireless data link: Bluetooth
Tires and Rims
Wheels: alloy
Windows
Front wipers: rain sensing
Air Conditioning
Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags · Rear side curtain airbags
Audio System
CD changer: 6 · Single disc in-Dash CD · Premium Brand: Alpine · AM/FM radio · Remote CD changer location: in cargo area · 1 subwoofer
Brakes
ABS: 4-wheel · Front brakes: ventilated disc · Rear brakes: ventilated disc
Comfort Features
Center console trim: wood · Dash trim: wood · Door trim: wood · Floor Mat Material: carpet · Floor Mats: front · Shift knob trim: wood · Steering wheel trim: wood
Convenience Features
Adjustable pedals: power · Center console: front console with storage · Dimming rearview mirror: auto-dimming · Easy entry: power driver seat · Memorized settings: driver seat · Multi-function remote: keyless entry · Overhead console: overhead console with storage · Reading lights: front · Steering wheel: tilt and telescopic · Steering wheel mounted controls: audio · Storage: door pockets · Sunshade: power rear window
Driver Seat
Adjustable lumbar support: power · Power adjustments: 10
Exterior Features
Grille color: chrome
Headrests
Front headrests: adjustable · Number of front headrests: 2
Instrumentation
Warnings and reminders: low fuel level
Lights
Exterior entry lights: security approach lamps · Headlights: Xenon
Mirrors
Exterior mirrors: heated
Passenger Seat
Power adjustments: 8
Rear Seats
Type: split-bench
Roof
Moonroof: one-touch open/close
Safety
Active head restraints: driver · Parking sensors: rear
Seatbelts
Rear center seatbelt: 3-point
Seats
Driver seat power adjustments: reclining · Front seat type: sport bucket · Passenger seat power adjustments: reclining · Rear headrests: adjustable · Rear seat folding: split · Upholstery: leather
Spare Tire
Mount Location: inside
Suspension
Front Suspension Classification: independent · Front Suspension Type: double wishbones · Rear Suspension Classification: independent · Rear Suspension Type: double wishbone · Stabilizer bar(s): front
Telematics
Phone wireless data link: Bluetooth
Tires and Rims
Wheels: alloy
Windows
Front wipers: rain sensing