Drivers encountering this error often report erratic vehicle behavior that directly impacts drivability:
Mercedes released multiple software updates for the TCU (Transmission Control Unit) between 2016 and 2021. If your car has outdated software or if a previous owner replaced the valve body with a used unit without reprogramming, the TCU and ECU will have a communication mismatch. The "Top" reference voltage calculated by the ECU does not match what the TCU reports. mercedesbenz errorp061a98 top
With engine idling (warm), monitor:
In some cases, the ECU software may need a calibration update from Mercedes-Benz to properly interpret torque signals. Diagnostic Steps for P061A98 Drivers encountering this error often report erratic vehicle