Note: This is no longer required with an off-road tune for " />

How to Reset Adblue in 2011+ VAG ECUs

Note: This is no longer required with an off-road tune for

  1. Before resetting Adblue:
    1. The ECU must be stock. Tuned ECU software may also be OK if it does not deactivate adblue yet (e.g. plain Stage 1 or Stage 2).
    2. Don't read the ECU yet.
    3. Don't change any mechanical part in the car yet.
  2. Here's the Adblue/SCR reset procedure video: https://youtu.be/FKBjQ7Ozu20
  3. Here's the Adblue/SCR reset verification video: https://youtu.be/8Km71drfqd8 
  4. Perform exhaust delete. 
  5. Remove Adblue injector (leave wiring and hose).
  6. Remove NOx sensor. For 2012-2014 Passats, follow instructions below:
    1. Under plastic shield, remove two nuts holding sensor and disconnect from harness. 
    2. Tuck exhaust flapper harness up under the plastic shield.
    3. Secure the plastic shield.
  7. Install new exhaust kit.
  8. Do not start the vehicle.
  9. Install the tune.
  10. The Adblue tank should always remain 75-100% fuel. 

Below are screen shots of Adblue/SCR reset successes and failures in a 2012 VW Passat TDI:

 

Below is a screen shot of a properly reset Adblue/SCR in a 2015 Audi Q5 3.0L TDI:

This may also be helpeful:
https://forums.ross-tech.com/showthread.php?3000-2012-2014-NAR-Passat%28A32%29-TDI-CKRA-%96-AdBlue-Level-Reset-Procedure


The instructions below are from another dealer who performed a 2012 VW Passat TDI EDC17C54 adblue reset:

How to Reset Adblue

  • Engine off key on
  • Adblue Tank "FULLY" Topped off
  • Engine 01
  • Basic settings 04
  • Resetting of SCR Tank Level Detection
  • "Go"
  • You will see "Finished Correctly | End System OK"
  • "Stop"
  • "Done Go Back"
  • Basic settings 04
  • Reset SCR Lock
  • "Go"
  • You will see "Finished Correctly | End System OK"
  • "Stop"
  • "Done Go Back"

How to Verify Adblue is reset

  • Open Engine -> Adv. Meas. Blocks in VCDS

UDS Block 448 = Reducing agent fill level
UDS Block 453 = Reducing agent tank fill level indicator raw
UDS Block 467 = Sensor for reducing agent fill level; fill level
UDS Block 505 = Status of reducing agent warning - Bit 0
UDS Block 514 = Status of reduction agent level

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