The owner of a VW Tiguan with a 2.0 TDI DFHA engine contacted us. The car had been reprogrammed by a third-party company. The customer complained about the lack of particulate filter burnout, although he had only requested that AdBlue be disabled. We performed a diagnostic test on the car, and his concerns were confirmed: the particulate filter hadn’t burned out for over 2,000 km. This is a very common occurrence: incorrectly disabled AdBlue systems. Continued driving with such a faulty firmware could lead not only to particulate filter failure but also to turbocharger and engine damage. We returned the car to stock condition, properly disabled AdBlue, and regenerated the particulate filter. The customer was very pleased that we managed to do this before the particulate filter failed.
We provide deletion/disable services for:
✅EGR (Exhaust Gas Recirculation)
✅DPF (Diesel Particulate Filter)
✅FLAPS (Swirl Flaps)
✅Start Stop (Start-Stop system software disable)
✅Active Grille Shutter (AGS) (Active radiator shutter delete)
Frequent Adblue (SCR) errors:
- 28922 – Reductant
P20E8 00 [237] – Pressure too low - 9656 – Reductant tank heater on
P202B 00 [237] – Short to ground - 22585 – Reductant level sensor
P203B 00 [237] – Invalid signal - 21378 – Reductant dosing module
P20FE 00 [101] – Malfunction - 11393 – Reductant level sensor
P204B 00 [096] – Invalid signal - 14416 – Heating system output stage reducing agent
P20B7 00 [175] – short to ground - 9655 – Reductant tank heater on
P202A 00 [237] – open circuit - 16936 – Reductant heating element 2 on
P20BD 00 [032] – open circuit - 9654 – Reductant heating system output stage
P148B 00 [040] – malfunction - 9650 – Reductant heating system output stage 2
P148C 00 [175] – malfunction - 28648 – Specified in ISO document 15031-6
P206B 00 [237] – 2005
P206B – Reductant quality sensor invalid signal - 9617 – Reductant heating element 1 on
P20B9 00 [10101111] – open circuit - 9636 – Reductant purge valve
P20A0 00 [10101111] – open circuit - 9686 – Reductant tank temperature sensor
P205A 00 [10101111] – electrical malfunction - 10098 – Reductant pump 1 control signal supply
P208B 00 [01100101] – invalid signal - 18612 – Reductant
P207F 00 [01100101] – insufficient efficiency - 28416 – Reductant level sensor/Tank temperature
U121D 00 [10101111] – no communication - 9687 – Reductant tank temperature sensor
P205C 00 [10101111] – short to ground - 41157 – Reductant level sensor
P203F 00 [00100111] – weak signal
- 17277 – SCR; NOx Catalyst; Bank 1
P20EE 00 [101] – Efficiency Too Low - 9879 – NOx Sensor 1 Heating Element; Bank 1
P2209 00 [101] – Invalid Signal - 9574 – NOx Sensor 1; Bank 1
P2200 00 [096] – Electrical Malfunction - 9580 – NOx Sensor 1; row 1
P2201 00 [096] – invalid signal - 9690 – NOx sensor
P1032 00 [096] – signal level too high - 28992 – NOX sensor 2
U029E 00 [175] – no communication - 9567 – NOx sensor 2; Row 1
P229F 00 [237] – invalid signal - 9688 – Reductant tank temperature sensor
P205B 00 [109] – invalid signal - 9654 – Reductant heating system output stage
P148B 00 [040] – malfunction - 9650 – Reductant heating system output stage 2
P148C 00 [175] – malfunction - 37062 – Reductant quality control module
U02A2 00 [175] – no communication - 9611 – Reductant injector; Row 1
P2047 00 [039] – Open Circuit - 9561 – NOx Sensor 2; Row 1
P229E 00 [175] – Electrical Malfunction - 9880 – NOx Sensor 2 Heating Element; Row 1
P22A7 00 [172] – invalid signal - 29630 – Reductant flow
P218F 00 [237] – not recognized - 28413 – Reductant level sensor
P203D 00 [036] – short circuit to positive - 9639 – Reductant pump 1 control signal supply
P208A 00 [10101111] – open circuit - 9633 – Reductant level sensor
P203A 00 [10101111] – electrical malfunction - 9684 – Pressure sensor restorer
P204A 00 [10101111] – electrical malfunction
