Audi A3 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Audi A3

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Audi A3 Problems

No Start after Refueling and Popping Noise from Trunk

Popping sounds from the rear of the vehicle may be heard moments after starting the engine, or when slowing to a stop. This noise is from the leak detection pump filling the fuel tank with air, and releasing to retest the system when it finds a fault. The sequence of faults identifying this issue are as follows:

  • Succession of loud pops from rear of vehicle
  • Pops go away, and fuel economy decreases 
  • Check engine light illuminates
  • OBD trouble code P2404 and/or P0441 is stored
  • Engine will not start after refueling (must crank for over 30 seconds)
  • Vibration when slowing to a stop

The cause is a valve which is mounted on the front of the intake manifold, commonly called the N80 valve, or EVAP system purge valve. The valve is designed to open under specific circumstances, but a worn valve will remain open at all times, preventing the pressurization of the fuel tank. 

Correction of the issue is to replace the N80 valve with the latest revision. 

Decreased Power and Fuel Economy from Carbon Buildup

The 2006 - 2017 Audi A3 2.0FSI, 2.0TFSI, and 3.2FSI direct injection engines are subject to carbon buildup in the intake system which can cause power loss, OBD codes and a check engine light, and a rough idle. In normal engines, the engine is cleaned by the gasoline flowing through the injectors and into the intake system, however, the A3 uses direct injection so gasoline does not flow through common carbon buildup areas. 

Possible trouble codes include: P0300P0301P0302P0303P0304, P0305, P0306.

The solution is to remove the intake manifold and professionally clean the intake manifold, intake ports on the cylinder head, and the intake valves. This may need to be done in as few as 20,000 miles. 

Loss of Power Due to Torn Rubber Valve

The Audi A3 2.0T FSI and Audi A3 2.0TFSI engine looses power if the turbocharging system has a leak. The most common turbo boost leak is a torn rubber diaphragm on the diverter valve, which is intended to open only if pressure gets too high. Common symptoms are increased turbo noise when letting off of the gas pedal, power loss, and engine code P0234.

If there is a turbocharging system leak, the system will need to be inspected, and the defective seals and/or valve will require replacement. 

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Audi A3 Questions

coil failure (1 answer)

how to test colis

can i drive car with the catalytic converter failing and causing to lose power (2 answers)

how long can i drive this for. I'm five hours from carman if i need to trade it in. or should i fix it for 1000.00

Cost to replace engine with used one with 85,000 miles is $ 5,100.00 seemed high for used. Is that a fair price? (1 answer)

The timing belt broke sending the Pistons thru the engine. It was inspected by the extended warranty company we have and they agreed it had to be replaced. They pay 3,500 leaving us to cover the rest so can someone help us know if 5,100 is a fair deal? Thank u.

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Audi A3 Recalls

Fuel Leaks Into And Out From Evaporative Emissions System

Fuel may leak from the fuel tank into the evaporative emissions charcoal canister filter element, and then externally. Dealers will replace the suction pump inside the fuel tank free of charge to resolve the concern.

Side Marker Lights Do Not Illuminate With Parking Lights Or Headlights On

The side marker lights may not illuminate when the headlights or parking lights are on. Dealers will upload revised software to the vehicle to correct the concern free of charge.

Driver's Frontal Air Bag Inflator Ruptures And Sprays Metal Fragments

The driver's frontal air bag inflator may deploy the air bag with excessive pressure, resulting in the inflator rupturing and causing metal debris to be sprayed onto vehicle occupants. Dealers will replace the driver's frontal air bag inflator free of charge to resolve the concern.

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Audi A3 Reviews

My commuter car, great in the winter, decent mileage. I have recently run into the 110k maintenance and the check engine light is coming on and having trouble diagnosing it. 1500 in and still comes on.
Fantastic car, the best looking hatchback out there. Body style is not for everyone, but very functional. The transmission, as many have noted, can be jerky when starting, or during heavy traffic, but boy can it move when opened up. The sport mode holds high RPMs and engages neutral for cornering, quite a thrill on highways. Fantastic lighting package, the dynamic HID's with foglight combo ...
Love the performance and total package, but the warning lights just keep coming and cost $$$. Also had major problems with transmission early on and the car has never been right.

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