My Audi A3TDI has these codes popping up P0420, P2BA6, P0401,P0299
What do these codes mean??

For me, the 2011 Audi A3 sports wagon is just about perfect. It offers plenty of space while maintaining its parking-friendly footprint, comes with brag-worthy refinements, and above all, handles like an Audi.
Of course I stand only 5 and a half feet tall, live in a city, and drive alone more than 90 percent of the time. For someone like me, headroom – in this case measuring less than 40 inches – is just as irrelevant as shoulder room or rear passenger comfort. In a word, my take on driving perfection might not translate to those of you who play college basketball or have a family of five.
Perhaps this is one of the reasons why commercial success has largely eluded the A3, which made its U.S. debut in 2005. Looking like a wagon but posing as a hatch, the little-changed 2011 Audi A3 remains a bit too confining for taller drivers and passengers. Even with its five-door “Sportback” design and a highly configurable 60/40-split-folding rear bench, the A3 is just not bulbous enough to yield the kind of room and cargo space today’s hatchback buyers want. The standard all-leather interior might also give you a moment of pause before hurling a rusty grill and fishing gear into the back of your Audi.
Yet if you're like me and city traffic is your great outdoors, you’ll be pleased to know that the 2011 A3 is a hub of everything luxury and hi-tech. Between the Premium and Premium Plus trim levels, you'll find features like Audi’s own 10-speaker MP3 audio with an SD card slot and auxiliary input, dual-zone automatic climate control, hands-free Bluetooth system for cell phones, daytime running xenon LEDs, 17-inch ten-spoke wheels with 225/45 all-season tires, and all things power. Like last year’s model, the new 2011 A3 is also peppered with small exterior add-ons from Audi’s high-performance S line.
So far we have learned that perfection is relative. However, there is nothing ambiguous about the kind of driving experience only a German machine can inspire. This doesn’t mean that the new A3 stands to cast out its few class rivals, let alone its own brethren from the S division. Nevertheless, the themes and sounds are all familiar, delivered by a turbocharged 2.0-liter four-cylinder engine capable of 200 hp and 207 lb-ft of torque. When matched to the automatic six-speed S tronic gearbox, it gets the A3 from 0-60 mph in 6.9 seconds; it takes 7.1 seconds with the quick-shifting six-speed manual.
Like other Audis, the A3 is available with Quattro all-wheel drive. It also offers a 140-hp, 2.0-liter clean-diesel engine, which it shares with the Volkswagen Jetta TDI. Though less peppy than the gas version, this engine is a remarkable study in fuel efficiency without the hybrid upgrade - it's rated by the EPA at an astounding 30/42 mpg! The gas version’s economy figures are downright disappointing by comparison, achieving only 21/30 mpg with a manual gearbox and 22/28 mpg with the S tronic.
It’s also worth noting that the A3 has seen no significant updates since the car shed its V6 engine for 2010. Besides slightly altering the side mirrors, rounding off the gear shifter, and playing with the hue of instrument dials, Audi has left the new 2011 A3 with little in the way of novelty.
The verdict? After more than five years on our side of the pond, the Audi A3 continues to outclass its competition with a perfect blend of vigor, comfort, and style. This tradition is very much alive in the 2011 model. At the same time, this brisk Euro wagon remains too pricey and perhaps too diminutive for a family hauler. So while the diesel version is definitely worth a look, most car buyers in this segment will likely find that the 2011 Audi A3 is just enough sport, but not enough car.
What do these codes mean??
There are so many independent car dealers selling late model cars with branded titles and unibody damage and the Guru compares those as great prices versus a new vehicle dealership that certifies their pre owned and are forbidden from purchasing the aforementioned vehicles. I don't feel this website is fair in judgement.
Air Conditioning
Active charcoal air filtration · Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Rear side airbags · Front side curtain airbags
Audio System
Antenna Type: diversity · Auxiliary audio input: jack · Single disc in-Dash CD · MP3 player: CD MP3 Playback · AM/FM radio · Satellite Radio: SiriusXM · 1 subwoofer · Total Number of Speakers: 9 · 140 watts
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.3 · Front brakes: ventilated disc · Rear brake diameter: 11.1 · Rear brakes: disc
Comfort Features
Armrests: rear center folding with storage · Center console trim: wood · Dash trim: wood · Door sill trim: aluminum · Door trim: simulated alloy · Floor Mat Material: carpet · Floor Mats: front · Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Assist handle: rear · Center console: front console with storage · Cupholders: front · Multi-function remote: trunk release · One-touch windows: 4 · Power outlet(s): front and rear · Power steering: speed-proportional · Reading lights: front · Steering wheel: tilt and telescopic · Steering wheel mounted controls: cruise controls · Storage: cargo tie-down anchors and hooks · Vanity mirrors: dual
Driver Seat
Adjustable lumbar support: power · Manual adjustments: 6
Drivetrain
Axle ratio: 3.09
Engine
Alternator: 140 amps
Exterior Features
Exhaust: dual exhaust tips · Exhaust tip color: alloy · Front bumper color: body-color · License plate bracket: front · Rear bumper color: body-color · Rear spoiler: roofline spoiler · Rear spoiler color: body-color · Rear trunk/liftgate: liftgate
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 3
Instrumentation
Warnings and reminders: low fuel level
Lights
Headlights: Halogen · Tail and brake lights: LED
Mirrors
Exterior mirrors: power
Passenger Seat
Adjustable lumbar support: manual · Manual Adjustments: 6
Rear Seats
Type: 60-40 split bench
Roof
Moonroof: dual · Roof rails: black
Safety
Child seat anchors: LATCH system · Impact sensor: post-collision safety system
Seatbelts
Front seatbelts: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front · Second row seatbelts: 3-point
Seats
Driver seat manual adjustments: reclining · Front seat type: bucket · Heated: front seats · Passenger seat manual adjustments: height · Rear headrests: adjustable · Rear seat folding: split · Upholstery: leather
Spare Tire
Mount Location: inside · Size: temporary
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 16.2
Suspension
Front Arm Type: lower control arms · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: MacPherson struts · Rear Shock Type: gas shock absorbers · Rear Spring Type: coil springs · Rear Suspension Classification: independent · Rear Suspension Type: multi-link · Stabilizer bar(s): rear
Telematics
Phone wireless data link: Bluetooth
Tires
Diameter: 18 · Type: all season
Tires and Rims
Wheel type: aluminum alloy · Wheels: alloy
Wheels
Wheel spokes: 15
Windows
Front wipers: variable intermittent · Liftgate window: fixed · Power windows: with safety reverse · Rear wiper: with washer
Air Conditioning
Active charcoal air filtration · Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Rear side airbags · Front side curtain airbags
Audio System
Antenna Type: diversity · Auxiliary audio input: jack · Single disc in-Dash CD · MP3 player: CD MP3 Playback · Premium Brand: Bose · AM/FM radio · Remote CD changer location: in glove compartment · Satellite Radio: SiriusXM · 1 subwoofer · Total Number of Speakers: 10 · 195 watts
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.3 · Front brakes: ventilated disc · Rear brake diameter: 11.1 · Rear brakes: disc
Comfort Features
Armrests: front center · Center console trim: simulated alloy · Dash trim: simulated alloy · Door sill trim: aluminum · Door trim: simulated alloy · Floor Mat Material: carpet · Floor Mats: front · Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Assist handle: rear · Center console: front console with storage · Cupholders: rear · Dimming rearview mirror: auto-dimming · Multi-function remote: trunk release · One-touch windows: 4 · Power outlet(s): front and rear · Power steering: speed-proportional · Reading lights: front · Steering wheel: tilt and telescopic · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: dual illuminating
Driver Seat
Adjustable lumbar support: power · Power adjustments: 8
Drivetrain
Axle ratio: 3.14
Engine
Alternator: 140 amps
Exterior Features
Exhaust: dual exhaust tips · Exhaust tip color: alloy · Front bumper color: body-color · Grille color: black · License plate bracket: front · Rear bumper color: body-color · Rear spoiler: roofline spoiler · Rear spoiler color: body-color · Rear trunk/liftgate: liftgate
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 3
Instrumentation
Warnings and reminders: maintenance reminder
Lights
Headlights: HID · Tail and brake lights: LED
Mirrors
Exterior mirrors: heated
Passenger Seat
Adjustable lumbar support: manual · Manual Adjustments: 6
Rear Seats
Type: 60-40 split bench
Roof
Moonroof: power glass · Roof rails: black
Safety
Child seat anchors: LATCH system · Impact sensor: post-collision safety system · Parking sensors: rear
Seatbelts
Front seatbelts: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front · Second row seatbelts: 3-point
Seats
Driver seat power adjustments: height · Front seat type: bucket · Heated: front seats · Passenger seat manual adjustments: height · Rear headrests: adjustable · Rear seat folding: split · Upholstery: leather
Spare Tire
Mount Location: inside · Size: temporary
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 16.2
Suspension
Front Arm Type: lower control arms · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: MacPherson struts · Rear Shock Type: gas shock absorbers · Rear Spring Type: coil springs · Rear Suspension Classification: independent · Rear Suspension Type: multi-link · Stabilizer bar(s): rear
Tires
Diameter: 18 · Type: all season
Tires and Rims
Wheel type: aluminum alloy · Wheels: alloy
Wheels
Wheel spokes: 15
Windows
Front wipers: rain sensing · Liftgate window: fixed · Power windows: with safety reverse · Rear wiper: with washer
Air Conditioning
Active charcoal air filtration · Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags · Front side curtain airbags
Audio System
Antenna Type: diversity · Auxiliary audio input: jack · Single disc in-Dash CD · MP3 player: CD MP3 Playback · AM/FM radio · Satellite Radio: SiriusXM · 1 subwoofer · Total Number of Speakers: 9 · 140 watts
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.3 · Front brakes: ventilated disc · Rear brake diameter: 11.1 · Rear brakes: disc
Comfort Features
Armrests: front center · Center console trim: simulated alloy · Dash trim: simulated alloy · Door sill trim: aluminum · Door trim: simulated alloy · Floor Mat Material: carpet · Floor Mats: front · Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Assist handle: rear · Center console: front console with storage · Cupholders: rear · Multi-function remote: keyless entry · One-touch windows: 4 · Power outlet(s): front and rear · Power steering: speed-proportional · Reading lights: front · Steering wheel: tilt and telescopic · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: dual
Driver Seat
Adjustable lumbar support: manual · Manual adjustments: 6
Drivetrain
Axle ratio: 3.04
Engine
Alternator: 140 amps
Exterior Features
Exhaust tip color: alloy · Front bumper color: body-color · License plate bracket: front · Rear bumper color: body-color · Rear spoiler: roofline spoiler · Rear spoiler color: body-color · Rear trunk/liftgate: liftgate
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 3
Instrumentation
Warnings and reminders: maintenance reminder
Lights
Headlights: Halogen · Tail and brake lights: LED
Mirrors
Exterior mirrors: heated
Passenger Seat
Adjustable lumbar support: manual · Manual Adjustments: 6
Rear Seats
Type: 60-40 split bench
Roof
Moonroof: power glass · Roof rails: silver
Safety
Child seat anchors: LATCH system · Impact sensor: post-collision safety system
Seatbelts
Front seatbelts: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front · Second row seatbelts: 3-point
Seats
Driver seat manual adjustments: height · Front seat type: bucket · Heated: front seats · Passenger seat manual adjustments: height · Rear headrests: adjustable · Rear seat folding: split · Upholstery: leather
Spare Tire
Mount Location: inside · Size: temporary
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 16.2
Suspension
Front Arm Type: lower control arms · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: MacPherson struts · Rear Shock Type: gas shock absorbers · Rear Spring Type: coil springs · Rear Suspension Classification: independent · Rear Suspension Type: multi-link · Stabilizer bar(s): rear
Telematics
Phone wireless data link: Bluetooth
Tires
Diameter: 18 · Type: all season
Tires and Rims
Wheel type: aluminum alloy · Wheels: alloy
Wheels
Wheel spokes: 15
Windows
Front wipers: variable intermittent · Liftgate window: fixed · Power windows: with safety reverse · Rear wiper: with washer
Air Conditioning
Active charcoal air filtration · Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Rear side airbags · Front side curtain airbags
Audio System
Antenna Type: diversity · Auxiliary audio input: jack · Single disc in-Dash CD · MP3 player: CD MP3 Playback · AM/FM radio · Satellite Radio: SiriusXM · 1 subwoofer · Total Number of Speakers: 9 · 140 watts
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.3 · Front brakes: ventilated disc · Rear brake diameter: 11.1 · Rear brakes: disc
Comfort Features
Armrests: rear center folding with storage · Center console trim: simulated alloy · Dash trim: wood · Door sill trim: aluminum · Door trim: simulated alloy · Floor Mat Material: carpet · Floor Mats: front · Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Assist handle: rear · Center console: front console with storage · Cupholders: front · Multi-function remote: trunk release · One-touch windows: 4 · Power outlet(s): front and rear · Power steering: speed-proportional · Steering wheel: tilt and telescopic · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: dual
Driver Seat
Adjustable lumbar support: power · Manual adjustments: 6
Drivetrain
4WD Type: full time · Axle ratio: 3.14 · Limited slip differential: center
Engine
Alternator: 140 amps
Exterior Features
Exhaust: dual exhaust tips · Exhaust tip color: alloy · Front bumper color: body-color · License plate bracket: front · Rear bumper color: body-color · Rear spoiler: roofline spoiler · Rear spoiler color: body-color · Rear trunk/liftgate: liftgate
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 3
Instrumentation
Warnings and reminders: maintenance reminder
Lights
Headlights: Halogen · Tail and brake lights: LED
Mirrors
Exterior mirrors: heated
Passenger Seat
Manual Adjustments: 6
Rear Seats
Type: 60-40 split bench
Roof
Moonroof: power glass · Roof rails: black
Safety
Child seat anchors: LATCH system · Impact sensor: post-collision safety system
Seatbelts
Front seatbelts: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front and rear · Second row seatbelts: 3-point
Seats
Driver seat manual adjustments: height · Front seat type: sport · Heated: front seats · Passenger seat manual adjustments: height · Rear headrests: adjustable · Rear seat folding: split · Upholstery: leather
Spare Tire
Mount Location: inside · Size: temporary
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 16.2
Suspension
Front Arm Type: lower control arms · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: MacPherson struts · Rear Shock Type: gas shock absorbers · Rear Spring Type: coil springs · Rear Suspension Classification: independent · Rear Suspension Type: multi-link · Stabilizer bar(s): rear
Telematics
Phone wireless data link: Bluetooth
Tires
Diameter: 18 · Type: summer performance
Tires and Rims
Wheel type: aluminum alloy · Wheels: alloy
Wheels
Wheel spokes: 10
Windows
Front wipers: variable intermittent · Liftgate window: fixed · Power windows: with safety reverse · Rear wiper: with washer
Air Conditioning
Active charcoal air filtration · Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags · Front side curtain airbags
Audio System
Antenna Type: diversity · Auxiliary audio input: jack · Single disc in-Dash CD · MP3 player: CD MP3 Playback · Premium Brand: Bose · AM/FM radio · Remote CD changer location: in glove compartment · Satellite Radio: SiriusXM · 1 subwoofer · Total Number of Speakers: 9 · 140 watts
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.3 · Front brakes: ventilated disc · Rear brake diameter: 11.1 · Rear brakes: disc
Comfort Features
Armrests: rear center with cupholders · Center console trim: simulated alloy · Dash trim: simulated alloy · Door sill trim: aluminum · Door trim: wood · Floor Mat Material: carpet · Floor Mats: front and rear · Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Assist handle: rear · Center console: front console with storage · Cupholders: rear · Dimming rearview mirror: auto-dimming · Multi-function remote: trunk release · One-touch windows: 4 · Power outlet(s): front and rear · Power steering: speed-proportional · Reading lights: front · Steering wheel: tilt and telescopic · Steering wheel mounted controls: phone · Storage: front seatback · Vanity mirrors: dual illuminating
Driver Seat
Adjustable lumbar support: power · Power adjustments: 8
Drivetrain
Axle ratio: 3.04
Engine
Alternator: 140 amps
Exterior Features
Exhaust tip color: alloy · Front bumper color: body-color · Grille color: black · License plate bracket: front · Rear bumper color: body-color · Rear spoiler: roofline spoiler · Rear spoiler color: body-color · Rear trunk/liftgate: liftgate
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 3
Instrumentation
Warnings and reminders: coolant temperature warning
Lights
Headlights: HID · Tail and brake lights: LED
Mirrors
Exterior mirrors: heated
Passenger Seat
Adjustable lumbar support: manual · Manual Adjustments: 6
Rear Seats
Type: 60-40 split bench
Roof
Moonroof: power glass · Roof rails: silver
Safety
Child seat anchors: LATCH system · Impact sensor: post-collision safety system · Parking sensors: rear
Seatbelts
Front seatbelts: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front · Second row seatbelts: 3-point
Seats
Driver seat power adjustments: height · Front seat type: sport · Heated: front seats · Passenger seat manual adjustments: height · Rear headrests: adjustable · Rear seat folding: split · Upholstery: leather
Spare Tire
Mount Location: inside · Size: temporary
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 16.2
Suspension
Front Arm Type: lower control arms · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: MacPherson struts · Rear Shock Type: gas shock absorbers · Rear Spring Type: coil springs · Rear Suspension Classification: independent · Rear Suspension Type: multi-link · Stabilizer bar(s): rear
Tires
Diameter: 18 · Type: summer performance
Tires and Rims
Wheel type: aluminum alloy · Wheels: alloy
Wheels
Wheel spokes: 10
Windows
Front wipers: variable intermittent · Liftgate window: fixed · Power windows: with safety reverse · Rear wiper: with washer
Air Conditioning
Active charcoal air filtration · Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags · Front side curtain airbags
Audio System
Antenna Type: diversity · Auxiliary audio input: jack · Single disc in-Dash CD · MP3 player: CD MP3 Playback · Premium Brand: Bose · AM/FM radio · Remote CD changer location: in glove compartment · Satellite Radio: SiriusXM · 1 subwoofer · Total Number of Speakers: 9 · 140 watts
Brakes
ABS: 4-wheel · Braking assist: hill start assist · Front brake diameter: 12.3 · Front brakes: ventilated disc · Rear brake diameter: 11.1 · Rear brakes: disc
Comfort Features
Armrests: rear center with cupholders · Center console trim: simulated alloy · Dash trim: wood · Door sill trim: aluminum · Door trim: wood · Floor Mat Material: carpet · Floor Mats: front and rear · Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Assist handle: rear · Center console: front console with storage · Cupholders: front · Dimming rearview mirror: auto-dimming · Multi-function remote: keyless entry · One-touch windows: 4 · Power outlet(s): front and rear · Power steering: speed-proportional · Reading lights: front · Steering wheel: tilt and telescopic · Steering wheel mounted controls: phone · Storage: front seatback · Vanity mirrors: dual illuminating
Driver Seat
Adjustable lumbar support: power · Power adjustments: 8
Drivetrain
4WD Type: full time · Axle ratio: 3.14 · Limited slip differential: center
Engine
Alternator: 140 amps
Exterior Features
Exhaust: dual exhaust tips · Exhaust tip color: alloy · Front bumper color: body-color · Grille color: black · License plate bracket: front · Rear bumper color: body-color · Rear spoiler: roofline spoiler · Rear spoiler color: body-color · Rear trunk/liftgate: liftgate
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 3
Instrumentation
Warnings and reminders: coolant temperature warning
Lights
Headlights: HID · Tail and brake lights: LED
Mirrors
Exterior mirrors: integrated turn signals
Passenger Seat
Manual Adjustments: 6
Rear Seats
Type: 60-40 split bench
Roof
Moonroof: power glass · Roof rails: silver
Safety
Child seat anchors: LATCH system · Impact sensor: post-collision safety system · Parking sensors: rear
Seatbelts
Front seatbelts: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front and rear · Second row seatbelts: 3-point
Seats
Driver seat power adjustments: height · Front seat type: sport · Heated: front seats · Passenger seat manual adjustments: height · Rear headrests: adjustable · Rear seat folding: split · Upholstery: leather
Spare Tire
Mount Location: inside · Size: temporary
Spare Wheel
Rim Type: steel
Steering
Steering ratio: 16.2
Suspension
Front Arm Type: lower control arms · Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: MacPherson struts · Rear Shock Type: gas shock absorbers · Rear Spring Type: coil springs · Rear Suspension Classification: independent · Rear Suspension Type: multi-link · Stabilizer bar(s): rear
Tires
Diameter: 18 · Type: summer performance
Tires and Rims
Wheel type: aluminum alloy · Wheels: alloy
Wheels
Wheel spokes: 15
Windows
Front wipers: variable intermittent · Liftgate window: fixed · Power windows: with safety reverse · Rear wiper: with washer