2002 Audi A6 Common Problems, Issues, Recalls, and Reliability

• 2002 Audi A6 Digital Display on Instrument Cluster May Fail

  The digital display portion of the instrument cluster may fail. Our technicians tell us the entire instrument cluster will need to be replaced to correct this concern.

• 2002 Audi A6 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.

• 2002 Audi A6 Premature Wear in Multi-Link Suspension Components May Cause Noise

  Premature wear in various multi-link suspension components can cause noises that are difficult to diagnose. Worn suspension parts can also cause uneven tire wear and create steering alignment problems.

• 2002 Audi A6 Flasher Relay Failure Can Cause Erratic Turn Signal Operation

  Erratic turn signal operation can be a result of a failing turn signal flasher relay which will require replacement.

• 2002 Audi A6 Oil leaks from camshaft drive pulleys and variable valve timing hydraulics

  Oil leaks from the camshaft drive pulleys and variable valve timing hydraulics are common. If the variable valve timing hydraulics is leaking, the Check Engine Light may illuminate from inaccurate valve timing.

• 2002 Audi A6 Check Engine Light Due to Faulty Torque Converter

  A problem with the torque converter can cause the Check Engine Light to illuminate.

• 2002 Audi A6 ABS Light Due to ABS Control Module Failure

  The anti-lock brake system (ABS) control module may fail causing the ABS light to illuminate. Failed modules should be replaced to restore ABS operation.

• 2002 Audi A6 Rainwater May Accumulate in Plenum Tray Due to Clogged Drains

  Clogged drains can allow rainwater to accumulate in the plenum tray (at the base of the windshield). The water may leak into the vehicle's interior, brake booster, or electrical components, which can lead to major problems. Our technicians recommend keeping the tray clear of leaves, pine needles, and other debris.

• 2002 Audi A6 Inspect CV Boots and Joints at Each Service

  Our technicians recommend having the constant velocity (CV) boots and CV joints inspected at each service. Servicing torn CV boots early can prevent the need to replace the CV half shaft or CV joint.

• 2002 Audi A6 Water From Clogged Sun Roof Drains May Damage Control Modules

  Clogged sunroof drains can allow water to enter the interior and accumulate under the carpet where various control modules are mounted. Over time, the accumulated moisture can damage the control modules.

• 2002 Audi A6 Maintain Fuel Quality to Avoid Misfires and CEL Illumination

  Fuel quality must be maintained to avoid engine misfire problems; the misfires may cause the Check Engine Light to illuminate.

2002 Audi A6 Questions and Answers

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2002 Audi A6 Maintenance and Repair

• Causes of 2002 Audi A6 Engine Vibration
• How To Use a 2002 Audi A6 Battery Charger
• 2002 Audi A6 Exhaust Smell Understanding Where The Problem Lies
• How To Tell If You Have a 2002 Audi A6 Faulty Hydraulic Lifter
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• 2002 Audi A6 Exhaust Manifold Leak Repair Cost: Average Prices To Expect
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