How to Use Lonsdor ST-P181 Tool to Reset Porsche Idle Start-stop?

Lonsdor ST-P181 is able to reset Porsche idle start-stop & clear fault codes on 911 (991), Boxster (981), Cayman 2nd generation 2010- (92A), Cayman (981), Macan and .Panamera.


Here Lonsdor ST-P181 image, you can see it is a simple tool with several icons and a small screen. Its lightweight, portable and easy to handle.


Very important!

After you purchase Lonsdor ST-P181, please connect this tool to vehicle OBD and read vehicle VIN code. Once confirmed, it can only be used in this car. After reparation, the vehicle will be restored to the factory settings. Moreover, the device can be used to open/close the function of memorizing the car start-stop state unlimitedly.

here attach a youtube video to show how Lonsdor ST-P181 work:


Option 1: Choose “Start and stop function settings”

Press the icon “Start”


When this function is enabled, it can remember the state of idle start/stop when the car was shutting down last time. For example, if the start-stop function is off/on after a car stalls, the next time you start the car then the memory will stay in the closed/open state.

Note: The mechanism of this feature is not directly to cancel the idle start -stop, but to remember the state of the last start-stop function. In addition, restore factory settings is also available.


Reading vehicle information.


Whether to bind VIN code xxx is the car in use? After binding, this function can only be used by the car.  (


Memorize the open/close state of idle start/stop system after the car is shutting down.

The start stop function will be restored to the factory state.

Press “Enter”, get the current data XXX and press the up and down button to reset the value you want.


Confirming system…




Setup complete.


Option 2: Clear fault codes

Lonsdor ST-P181 can apply to clearing the car fault code. For example, if the engine fault light is on, you do not have to go to repair shop to clear it.



Press the icon “Start”


Clearing fault code, please wait…


The fault code is cleared.


Option 3: Choose “Check binding information”

The device is already bound to the car with VIN.


So with Lonsdor ST-P181, you can achieve:

1.Reduce engine damage.
2.Reduce battery damage.
3.Reduce spark plug damage.
4.Increase air conditioning comfort.
5.Avoid the road trouble caused by a slow start of the car after parking.
6.Avoid water flowing into engine while restaring car on a rainy day.
7. Have a better driving experience.