Audi Allroad Air Suspension Conversion ECU Soft Codes and Recoding

Are you experiencing a check engine light, suspension leveling light, or stored soft codes in your ECU after installing an Audi Allroad air suspension to conventional coil spring conversion? The below information is a brief overview of how to resolve dashboard instrument cluster warning light issues.

Subject: Audi Allroad Air Suspension Conversion - ECU Recoding

Application: Audi Allroad C5 Chassis, 2000-2005

Part Number: MGR2001-A (2.7T), MGR2001-B (4.2L), MGR2001-C (2.5TDI)

Disclaimer: Please read the following information BEFORE attempting any mechanical service on your Audi Allroad. BLAUfergnugen! Inc. recommends that an Audi Factory Trained ASE Certified Technician service and install your parts to ensure proper procedures and safety. This will prevent improper installation which may lead to possible vehicle damage. Always read the factory service manual safety instructions and guidelines. Always wear safety glasses and other safety items when performing the following work.

Due to changes in the suspension control unit in the 2005 model year, some 2005 Allroads may not allow for the dashboard suspension warning light and check engine light to be turned off after the installation of this kit. This issue appears to be associated only with the 2005 Model year.

To turn off the check engine light and leveling light, you will need to recode the ECU (Engine Control Module). By recoding the ECU the ECU will no longer recognize the pneumatic air suspension system.

To recode the Audi Allroad ECU proceed as follows:

Tools Needed - Ross-Tech Diagnostic Software

1. Plug Ross-Tech PC into Audi Allroad OBD com-port.

2. Cycle the ignition key to the accessory position.

3. Access Ross-Tech software from a PC desktop.

4. Select-control module.

5. (01-Engine) control module (Allow several seconds to pass and allow the Ross-Tech to communicate with the engine control module).

6. (07-Coding) engine recode module

7. (Software Coding) change the last digit from 5 to 2 and save the software coding by clicking (DO IT!) (Allow several seconds to pass and allow the Ross-Tech to communicate with the engine control module).

8. Cycle the ignition key to the off position.

9. If necessary remove all stored codes from control modules. Cycle the ignition key to the accessory position, re-access the vehicle's control modules, and remove all stored codes from the control modules. Cycle the ignition key to the off position when done.

10. Unplug OBD com-port from the vehicle.

11. After all stored codes have been removed from the control modules start the vehicle to confirm there is no check engine light and leveling light.