XENTRY/DAS (preferred) or a high-end bi-directional scanner (Autel MaxiSys, Launch X431). Generic OBD readers will only show P061A – they will miss the "98 Top" nuance.
Verify all engine temperature sensors and ensure the ECM itself is not overheating.
Drivers facing this fault typically report a combination of electronic and drivability issues: mercedesbenz errorp061a98 top
According to Mercedes-Benz documentation, the .
: Generic OBD-II scanners may only show "Torque Performance," while Mercedes-specific Xentry tools provide the detailed "component overheated" sub-code needed for a precise fix. If you'd like to narrow this down, could you tell me: What is your vehicle model and year ? Drivers facing this fault typically report a combination
: Severe engine vibration, hesitation during acceleration, or sporadic stalling.
A common cause in older or high-mileage Mercedes-Benz vehicles (such as the W204 C250) is excess play in the camshaft adjusters. This play can cause the actual torque calculation within the ECM to disagree with the expected torque, triggering the P061A98 error. 2. Overheated Control Unit or Sensors : Severe engine vibration
Check all intake hoses and vacuum lines for cracks, loose clamps, or signs of wear.
In simple terms: The engine control unit (ECU) and the transmission control unit (TCU) are arguing. The car either thinks it is in Park ("P") when it isn't, or it thinks it is in a drive gear when the shifter says "Top."