Detecting Pressure Faults in the 0AM DQ200 Mechatronic Unit

The 7-speed dry-clutch transmission 0AM DQ200, manufactured by VAG, often suffers from problems in the mechatronic unit’s pressure accumulator. Most commonly, the fault occurs when a small crack develops in the pressure accumulator housing — a crack that may not be visible to the naked eye. The vehicle may enter limp mode, display a wrench warning symbol on the dashboard, or stop moving altogether.

You can easily check for a pressure fault with a diagnostic tester. Depending on the equipment, go to the transmission section and access live data. The maximum system pressure is 60 bar and the minimum is 42 bar. In the real-time data, you can observe how the pressure accumulator behaves. The actual value should fluctuate between these two readings — if the pressure never reaches 60 bar, the fault in the pressure system must be repaired.
 

Possible fault codes

Fault’s indicators (error codes) DSG7 DQ200 mechatronics
(VAG 006079/10902/10903) P17BF Malfunction in the hydraulic pump
(VAG 006300) P189C Limited performance due to insufficient pressure rise; Play protection (unjustfield activation/deactivation)
P1895 Limitation of perfomance due to pressure drop

 

Repair Recommendations

Our transmission parts selection includes two different repair kits. We also recommend replacing the mechatronic unit screws at the same time. A special tool is useful for removing the mechatronic unit.

Accumulator repair kit includes a new pressure accumulator surrounded by a reinforced steel shell. The part can be installed directly in place of the old accumulator, and the outer shell compensates for pressure leakage caused by cracks in the underlying aluminum housing.

 

Mechatronic repair kit includes all gaskets for the mechatronic unit as well as a reinforced aluminum housing for the pressure accumulator. If necessary, the pressure accumulator itself can also be replaced with a functional used unit.