Common dash warning lights in the Audi A4 B6 are check engine/EPC, abs, traction, srs airbag, DPF & service messages, but the full list of warning lights is shown below.
If you prefer a multi manufacturer OBD2 scan tool tool that works on this Audi A4 & other makes & models, we highly recommend this iCarsoft CR PRO +
Audi A4 B6 Check Engine Warning Light Meaning
The check engine warning lamp illuminates when the ignition is switched on & turns off when the engine starts.
If the engine lamp illuminates when the engine is running, a fault has been detected & you should get the fault diagnosed as soon as possible. Watch our video on why your Audi Check Engine Light Is Illuminated.
With the lamp illuminated, the vehicle may enter limp-home mode. Limp-home mode reduces vehicle performance to safeguard against any further damage to the vehicle.
Watch our video on the most likely reasons why your Audi Check Engine Light Light Is Illuminated
To diagnose/reset this check engine light, and remove the vehicle from Limp-home mode, we recommend the iCarsoft VAWS V1.0. With this tool, you can also view lots of live data like temperatures, pressures from all areas of the engine and transmssion system.
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 EPC Warning Light Meaning
The EPC warning lamp or Electronic Power Control illuminates when the ignition is switched on & turns off when the engine starts.
If the EPC light remains illuminated when the engine is running, it means there is a fault with this system and should be checked out. You may experience a loss of power. This system controls the throttle, accelerator pedal, cruise control and traction control systems.
Watch our video on the most likely reasons why your Audi EPC Light Is Illuminated
To diagnose an EPC warning light in your Audi, we recommend the iCarsoft VAWS V1.0.
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 SRS Airbag Warning Light Meaning
The airbag warning lamp illuminates, as a bulb check, when the vehicle's ignition is switched on & will turn off when the engine is started.
Watch our video on the most likely reasons why your Audi SRS Airbag Light Is Illuminated
If the lamp illuminates again while driving, there is a fault with the airbag system. You can diagnose & reset the airbag fault codes & warning light with the iCarsoft VAWS V1.0.
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 ABS Warning Light Meaning
The ABS warning lamp illuminates briefly, as a bulb check, when the vehicle's ignition is switched on & will turn off when the engine has started.
If the lamp remains on while driving there is a fault with the ABS system. Drive with care, avoiding heavy brake pedal application.
Watch our video on the most likely reasons why your Audi ABS Light Is Illuminated
You can diagnose faults in the ABS system with the iCarsoft VAWS V1.0.
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 Traction Control Warning Light Meaning
The Dynamic Stability Control (DSC) lamp flashes when the system is active.
If there is a fault with the system, it remains illuminated and the instrument panel displays a warning message.
To diagnose a fault in the DSC system, we recommend the iCarsoft VAWS V1.0.
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 EPB Electronic Parking Brake System Warning Light Meaning
The Electric Parking Brake (EPB) warning lamp illuminates if the EPB is correctly applied.
If the lamp illuminates during normal driving conditions, a fault has been detected. To find faults in this system, or calibrate the EPB electronic parking brake, open & close the calipers for brake bad removal/refitting we recommend the iCarsoft VAWS V3.0.
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 Brake Exclamation Warning Light Meaning
The brake warning lamp illuminates briefly, as a bulb check, when the vehicle's ignition is switched on.
If the lamp illuminates red while driving, suspect low brake fluid level or a fault with the ABS braking system.
To diagnose a fault in the braking system of your Audi, we recommend the iCarsoft VAWS V1.0.
The tool is in stock with same day dispatch and worldwide delivery.
Audi A4 B6 Oil Can Warning Light Meaning
If the low oil pressure warning lamp flashes or illuminates while driving, stop the vehicle as soon as safety permits. Switch off the engine immediately.
Check and top up the oil level, if necessary. Start the engine. If the lamp remains illuminated, switch the engine off immediately. You can diagnose this fault with the iCarsoft VAWS V1.0.
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 Glowplug Coil Warning Light Meaning
The glow plug lamp illuminates when the vehicle's ignition is switched on, to indicate that the glow plugs are active.
If the lamp remains on while driving there is a fault with the glowplug system. To diagnose this fault you can use the iCarsoft VAWS V1.0.
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 Cooling System Warning Light Meaning
The engine temperature warning lamp illuminates when the engine's temperature is too high.
The instrument panel also displays a warning message.
Stop the vehicle as soon as safety permits. You can check engine & transmission temperatures & diagnose faults with the iCarsoft VAWS V1.0.
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 Battery System Warning Light Meaning
The 12V battery charge warning lamp illuminates, as a bulb check, when the vehicle's ignition is switched on.
The lamp extinguishes when the engine is started.
If the lamp remains on or illuminates while driving, there is a fault with the battery charging system. The instrument panel displays a warning message.
Audi A4 B6 Oil Change and Inspection Due Reset Tool
There is a specific service schedule for your Audi A4 When the oil service or inspection needs to be carried out, you will see this message when starting the vehicle, and also turning off the vehicle.
To reset the Oil Service and inspection due message on your Audi A4, we recomend using the iCarsoft VAWS V3.0.
Watch our video of this tool completing the Oil Change and inspection due! dashboard reset
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 Electronic Throttle Calibration Tool
You can calibrate the Electronic Throttle system (ETC) on your Audi A4 by using the iCarsoft VAWS V3.0.
The tool is in stock with same day dispatch & worldwide delivery.
Audi A4 B6 Injector Coding Tool
You can code new injectors to your Audi A4 by using the iCarsoft VAWS V3.0.
The tool is in stock with same day dispatch & worldwide delivery.
If you require clarification that this tool can carry out this specific function on your vehicle, please email your vehicle VIN number and model year to enquiries@diagnostic-world.com
Audi A4 B6 Electronic Parking Brake EPB Tool
You can open & close the brake calipers, and calibrate the Electronic parking brake system (EPB) on your Audi A4 by using the iCarsoft VAWS V3.0.
The tool is in stock with same day dispatch & worldwide delivery.
If you require clarification that this tool can carry out this specific function on your vehicle, please email your vehicle VIN number and model year to enquiries@diagnostic-world.com
Audi A4 B6 Steering Angle Sensor Calibration Tool
You can calibrate the steering angle sensor system in your Audi A4 by using the iCarsoft VAWS V3.0.
The tool is in stock with same day dispatch & worldwide delivery.
1. Does that tool have the capability for the system/warning light you are trying to reset? So for example, lets say you have an ABS warning light on your dashbaord. You need to make sure you are buying a scan tool that has ABS capabilities and will actually allow you to communicate with the ABS system.
2. Assuming you do have the correct scan tool for the job, the next thing to look at is why the tool isnt turning off the warning light. When you attempt to reset the fault codes using the scan tool, it is communicating with the ECU, and asking the ECU to turn the light off.
If the light does not turn off, it means that the ECU has refused the request, and that it is not happy that the problem has been fixed. In other words the problem is still present, and if you think you have physically fixed the issue, you might need to go over everything again, checking connections, wiring etc.
It can be a misconception that these tools are a kind of magic pill, and that the tool can just reset a warning light without taking any action to fix the fault. This is not correct, in 99% of cases, you need to physically fix the fautl before the warning light in your Audi A4 can be turned off. The rare situations where the warning light will turn off without any physical fix is where a sporadic or intermittant fault has occured.
