There may be various problems which may prevent successful regeneration.
In most cases, there are stored fault-codes present in the drive train, or in the exhaust system.
Please do a Diagnostic session and try to clear found fault codes. Some of these faults have to be repaired to start a successful regeneration.
Known problems:
- More than two defective glow plugs (Especially at colder temperatures, or in winter)
- Defective coolant-thermostats (the coolant temperature should reach 85°C)
- Defective exhaust-pressure-sensor
- Problems with the intake-airmass sensor or with the throttle
- Special faults, e.g. 00480A or 00481A (Should you not be able to clear the faults, then please seek a local repair shop to investigate your diesel filter)
We recommend, to start a regeneration not too often in succession. (As a rule, the soot mass oscillates between 0-5g in the fully-fired state and approximately 30g just before regenerating). Possibly. Also helps one day gap between the regeneration requirement.
We have the best experience with the following procedure:
o Connect the adapter with the car and switch on the ignition
o Connect the app to the adapter/car
o Stich directly after the successful connection to the DPF-tile and start the DPF-Check
Now the app shows you the soot and ash masses from your filter.
o For a soot mass from approx. 15-20g a regeneration can be requested, for lower values this is usually unnecessary. With soot masses of more than 30-35g, there is usually one or more problems with the exhaust-system or the engine.
Then please run a diagnostic session and try to clear the faults. Sometimes you must fix the faults, before you can start the regeneration.
o Now you can request a regeneration by tapping the button.
o The DPF values can also be recorded and you can send it later via email.
o After a succesfull regeneration you have to go for a so called regeneration drive
Drive at a constant speed of 80 km/h (or faster) for 20-30 minutes. This results in the necessary exhaust gas and cooling water temperature and the engine control unit starts the regeneration.
o Now you should see a decrease of the soot mass -> Regeneration is successful!
