Disabling AdBlue with VCDS (Vcds Adblue Deaktivieren) is a complex process that requires a deep understanding of your vehicle’s engine control unit (ECU). This guide outlines the AdBlue reset procedures for various Volkswagen and Audi TDI engines using VCDS diagnostic software. Warning: Tampering with emissions systems is illegal in many jurisdictions and can void your vehicle’s warranty. This information is for educational purposes only.
AdBlue Reset Procedures with VCDS
This guide covers AdBlue reset procedures for different engine types, including 2.0L TDI and 3.0L V6 TDI engines.
2.0L TDI Engines (2012-2014 NAR Passat – A32 TDI/CKRA)
Pre-requisites:
- Engine warmed up (above 80°C) and idling.
- Transmission in Park or Neutral.
- Emergency brake engaged.
- Doors and hood closed.
- Driver’s seatbelt fastened (some models).
- Avoid pressing any pedals until instructed.
Reset Procedure:
- Clear all fault codes using VCDS.
- Select [01 – Engine].
- Select [Basic Settings – 04].
- Choose [Resetting of learned values of average quantity adaptation] and press [Go!]. Wait for completion and press [Stop].
- Choose [Reset learned values quant. meter. unit and press. contr. Valve] and press [Go!]. Wait for completion and press [Stop].
- Select [Check of SCR efficiency] and press [Go!].
- Depress the brake pedal, then the accelerator. The ECU should control engine speed.
- This test can take over 30 minutes. Upon successful completion, “System Okay” should display. The AdBlue warning and mileage countdown should reset. Verify no fault codes remain.
Example of an AdBlue warning light.
2.0L TDI Generation 3 (EA288 – CRUA and CVCA) – UDS Protocol
Pre-requisites:
- Key on, engine off.
Reset Procedure:
- Select [01 – Engine].
- Select [Basic Settings – 04].
- Select IDE04567 – Resetting of SCR tank level detection, press [Go!], and wait for “Finished Correctly”. Then press [Stop].
- Select IDE04730 – Reset SCR lock, press [Go!], and wait for “Finished Correctly”. Then press [Stop].
3.0L V6 TDI Engines – CATA Generation 1 (CAN/Non-UDS)
- Set Adaption Channel 80 to 001 to reset the level.
3.0L V6 TDI Engines – CNRB Generation 2 (UDS Protocol)
Pre-requisites:
- Key on, engine off.
Reset Procedure:
Follow the same steps as the 2.0L TDI Generation 3 (EA288) UDS protocol outlined above.
Conclusion
These procedures offer potential solutions for resetting AdBlue levels using VCDS. However, always consult official documentation and seek professional advice before attempting any modifications to your vehicle’s emissions system. Remember that manipulating emissions systems can have legal ramifications and potentially damage your vehicle. This information is intended for educational purposes only and should not be interpreted as an encouragement to violate any laws or regulations.
