2012 Audi Q7 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2012 Audi Q7

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2012 Audi Q7 Problems

Check Engine Light Due to Knock Sensor Fault

The Check Engine Light may illuminate with a knock sensor code stored. Our technicians tell us a revised knock sensor and bracket should be installed, along with heat shielding material to protect the new sensor, to correct this condition.

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. 

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2012 Audi Q7 Recalls

Fuel Pump Flange Cracks And Leaks Fuel

The fuel pump may crack at the flange resulting in a fuel leak. Dealers will clean the fuel pump flange and install a butyl rubber band to protect the pump free of charge to resolve the concern.

Potential Fuel Leak

The fuel rail is a tube that carries fuel to the fuel injectors. The fuel rail may leak, increasing the risk of a fire. Dealers will replace the affected fuel rail and corresponding seals to correct this concern.

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