2002 Audi A4 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2002 Audi A4

2002 Audi A4 Problems

Engine Misfire Due to Failed Ignition Coil, Spark Plug, or Ignition Wire

An ignition coil or spark plug may fail unexpectedly resulting in an engine misfire and possible illumination of the Check Engine Light. Vehicles equipped with spark plug wires may also develop a misfire caused by a failed spark plug wire.

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. 

ABS Light Due to 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.

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2002 Audi A4 Questions

will the 2012 2.0L cvt transmission fit and work on a 02 1.8t engine?? (1 answer)

Do anyone know where to repair a transmission controlling module of a 2002 Audi. (1 answer)

My 2002 Audi A4 "PRNDS" started flashing and remained in a stop whenever i come to a complete stop after travelling for a little miles and i got to know that the problem is with the TCM.

Can I buy a timing chain cylinoid (1 answer)

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2002 Audi A4 Reviews

Rated
based on 3 customer reviews
i bought my A4 less then 2 years ago and haven't had to many problems - except a new timing belt at 60,000 a new coolent system and sensors - water tank - and fuel pump - also had some electrical problems a random wire was running from a 10amp fuse to a 15amp fuse - really???? It accelerates on its on.. and it is very exspensive to fix.. i love the car - but will probably never buy one again..
This car has been nothing but a nightmare. First the cooling system broke and it required a new temp sensor and thermostat ($500). Then two weeks later, the check engine light appears and the car now needs a new catalytic converter ($1000). I only purchased the vehicle 4 months ago. It's a fun car to drive but all of the expensive repairs take all the fun out of the experience.
Love the 02 A4. The best part is the control and balance, I can comfortably take sharp curves on the freeway at 70 mph. Maintenance is expensive, the only downside. Highly recommend this car!

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