Car shakes when accelerates
While driving on the interstate, suddenly my car started to shake while accelerating and the check engine light started blinking. Any suggestions? Could it be my catalytic converter?

The all-new second-generation Hyundai Azera kicks off for 2012 as the final installment in a 2-year renovation of Hyundai's volume leaders. Aside from the obvious and award-worthy style change, the 2012 Azera also gains a new engine, new interior materials and more safety considerations and features than the average driver would expect out of a car in its price range—but that's just what Hyundai does.
The Azera may not be the show-stopping top-seller its twin is in Korea, but there's good reason—the Grandeur, as it is known over there, flies off lots so fast Hyundai can barely keep up with demand. Koreans love their Grandeur so much Hyundai had to produce every 2011 Azera in the fall of 2009 to make room for the 2012. It's no surprise then for Hyundai to make sure the Azera remains a well-kept secret, and for 2012 Hyundai plopped a pot of gold at the end of the rainbow for those bold enough to seek out the new Azera.
Hyundai is aiming high, very high, comparing the Azera to the Buick LaCrosse and Acura TL, not to mention throwing a bit of a challenge at BMW and Benz with an optional power rear sunshade and unique rear side glass sunshades. Hyundai stretched the Azera to fit more front head- and legroom than any sedan in its segment and then loaded it up in the company's usual wow-inspiring form, raising the bar with segment-first features like the manual side shades, standard navigation with rear-view camera and 90 days of the Blue Link infotainment system on the house, which features voice-command cellular texting, location-sensitive search, turn-by-turn navigation and an automatic monthly report on the health of your Azera.
Other standard inclusions for 2012 include leather upholstery, heated front and rear seats, Bluetooth connectivity, powered front seats with driver's memory, proximity key access and ignition, LED lights for brakes and turns, dual-zone climate control with rear vents, a 7-speaker stereo for everything but WMA playback and 18-inch alloy wheels. The Technology Package adds a panoramic sunroof, 19-inch alloys, xenon headlights, front and rear parking sensors, a power-adjustable steering wheel, front-seat cushion extenders, a 12-speaker Infiniti sound system with HD radio and those awesome sunshades.
The Azera's Lambda 3.3-liter V6 gained direct injection for 2012, putting out at least 30 hp more than the previous version, so it's now dubbed the Lambda 2. Good for 293 hp compared to the 2011's 260 and 255 lb-ft of torque instead of the previous 233, Hyundai boasts that the combination of this engine with its 6-speed automatic with manual shifters gives the Azera a best-in-class 23 mpg combined, or 20 mpg city/29 highway.
Safety and comfort come together for the 2012 Azera, which features Vehicle Stability Control to keep the car balanced in extreme situations or even when the driver is just a little under-experienced in wet conditions. Nine airbags will soften any blow, while a smart braking system adjusts itself to the current conditions and car load. To be sure, Hyundai left no stone undisturbed for the Azera's grand entrance to 2012, and if the early reports are true, feel free to let your hopes soar with the hype. Hyundai has delivered a gem.
While driving on the interstate, suddenly my car started to shake while accelerating and the check engine light started blinking. Any suggestions? Could it be my catalytic converter?
Air Conditioning
Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Driver knee airbags · Passenger airbag deactivation: occupant sensing deactivation · Rear side airbags · Rear side curtain airbags
Audio System
Antenna Type: element · Auxiliary audio input: jack · Single disc in-Dash CD · MP3 player: CD MP3 Playback · HD radio · Satellite Radio: SiriusXM · Total Number of Speakers: 6 · 450 watts
Brakes
ABS: 4-wheel · Front brake diameter: 12.6 · Front brakes: ventilated disc · Rear brake diameter: 11.2 · Rear brakes: disc
Comfort Features
Armrests: rear center with cupholders · Center console trim: simulated alloy · Dash trim: simulated wood · Door trim: simulated wood · Floor Material: carpet · Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Assist handle: front · Center console: front console with storage · Cupholders: rear · Dimming rearview mirror: auto-dimming · Multi-function remote: proximity entry system · One-touch windows: 2 · Power outlet(s): 3 total · Power steering: speed-proportional · Power windows: lockout button · Reading lights: front · Steering wheel: tilt and telescopic · Steering wheel mounted controls: phone · Storage: front seatback · Universal garage door opener: Homelink · Vanity mirrors: dual illuminating
Driver Seat
Adjustable lumbar support: power · Power adjustments: 10
Exterior Features
Body side moldings: body-color with chrome accents · Door handle color: body-color with chrome accents · Exhaust: dual exhaust tips · Exhaust tip color: chrome · Front bumper color: chrome accents · Grille color: chrome · Mirror color: body-color · Rear bumper color: body-color · Window trim: chrome
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 3
In Car Entertainment
Infotainment: Blue Link · Infotainment screen size: 7 in.
Instrumentation
Fuel economy display: MPG · Warnings and reminders: low oil level
Lights
Headlights: auto delay off · Tail and brake lights: LED
Mirrors
Exterior mirrors: integrated turn signals
Passenger Seat
Power adjustments: 8
Rear Seats
Type: 60-40 split bench
Safety
Camera system: rearview · Child seat anchors: LATCH system · Crumple zones: front · Impact absorbing seats: dual front · Rearview monitor: in dash
Seatbelts
Front seatbelts: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front · Seatbelt warning sensor: driver and passenger · Second row seatbelts: 3-point
Seats
Driver seat power adjustments: reclining · Front seat type: bucket · Rear headrests: adjustable · Rear seat folding: split · Upholstery: leather
Spare Tire
Mount Location: inside · Size: temporary
Spare Wheel
Rim type: aluminum alloy
Steering
Steering ratio: 14.5
Suspension
Front Arm Type: lower control arms · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Stabilizer Bar: diameter 24 mm · Front Suspension Classification: independent · Front Suspension Type: MacPherson struts · Rear Shock Type: gas shock absorbers · Rear Spring Type: coil springs · Rear Stabilizer Bar: diameter 17 mm · Rear Suspension Classification: independent · Rear Suspension Type: multi-link
Telematics
Driver assistance app: roadside assistance · Navigation system: touch screen display · Phone: voice activated · Phone wireless data link: Bluetooth · Smart device app compatibility: MyHyundai with Blue Link · Smart device app function: lock operation
Tires
Type: all season
Tires and Rims
Wheel type: aluminum alloy
Windows
Front wipers: variable intermittent