I just bought a 2003 audi a4 quattro 3.0. The low fuel symbol flashes even after I filled up the tank. Also the outside door is not locked...is there a button to lock/unlock the fuel access door? Thx

One of the simplest ways to do this is to lock all the doors manually if you can, stand outside the car with your key in hand. Insert the key into the driver door key slot and turn it to Lock, Lock, Unlock, Unlock. That should tell the vehicle that it is supposed to turn off the anti theft. This can happen whenever the battery dies or looses power for whatever reason. It also happens frequently when someone locks their keys in their car and a towman or locksmith opens their door for them. Those professionals should have done the reset as part of their process though.

If it is cold enough the mechanism could be frozen. If not the actuator is gone and will need to be replaced.

InInside the drivers door in the back of the storage compartment is the switch to open the fuel door.

Hello,

I think, I don´t understand your question ;)

The fuel tank is locked automatically when you lock the car. The cover has it´s own locking module conneced to the central locking. If it does not lock, the module should be checked for damage.

Fuses: Fuse arrangement in fuse panel, behind instrument cluster, left
Fuse Arrangement In Fuse Panel

1 - Heated washer jets 5A 2 - Turn signals 10A 3 - Headlight washer (relay), illumination for glove
compartment, climate control, Automatic Transmission, instrument cluster 5A 4 - License plate light 5A 5 - Instrument cluster, seat heating, test connection
for cruise control, bulb monitor for auto-check display, Automatic Transmission display, switch
lighting, mirror switches and actuators, airbag
warning light, outside temperature indicator,
climate control 10A 6 - Central locking system 5A 7 - Anti-lock brake system (ABS) 10A 8 - Vacant 9 - Mirror heating 10A 10 - Vacant 11 - Cruise control (Automatic Transmission) 5A 12 - On board diagnostic system 10A 13 - Brake lights 10A 14 - Interior lights, reading lights, anti-theft alarm system, vanity mirror 10A 15 - Instrument cluster, power windows, climate control, automatic transmission 10A 16 - Anti-lock brake system (ABS), Anti-Slip Regulation (ASR) 5A 17 - Heated door locks 10A 18 - High-beam, right 10A 19 - High-beam, left 10A 20 - Low-beam, right 15A 21 - Low-beam, left 15A 22 - Side marker and tail light, right 5A 23 - Side marker and tail light, left 5A 24 - Wiper and washer system 25A 25 - Blower for heating, climate control 30A 26 - Rear window defogger, mirror heating 30A 27 - Rear window wiper 15A 28 - Fuel Pump 15A 29 - Engine timing 30A 30 - Sun roof 20A 31 - Tail lights, cruise control, automatic transmission 15A 32 - Engine timing 20A 33 - Cigarette lighter 15A 34 - Engine timing 15A 35 - Trailer recptacle 30A 36 - Fog lights 15A 37 - Radio 20A 38 - Luggage compartment light, central locking system 15A 39 - Emergency flasher system 15A 40 - Horn 25A 41 - Anti-lock brake system (ABS) 25A 42 - Vacant 43 - Vacant

hey phil, chances are this is the fuel level sending unit. from what i remember of audi's this should take care of it.

More than likely the fuel pump. This may sound stupid but take something and give your gas tank a bit of a thump. What year is the car?

audi a4 2003 has warning light on that looks like a triangle within an arrow inside it what is it mean?

You have a fuel gauge sending unit problem, the gauge is not the problem, the sending unit is in the gas tank, u must remove the gas tank to replace it.

It's either a faulty tank sensor or a faulty fuel indicator light. Get the fuel indicator light checked first.