Harry's GPS Suite Forum

When investigating surprisingly high PS readings of my Galaxy 2.0 tdci, I realised the car settings automatically switch from turbo diesel to OTTO. It must be coming from OBD2 handshake. Can it be ignored? What difference does the engine type make?

The engine type influences power and consumption calculation. Otto engines are easy to calculate from MAF (and MAP) while Diesel engines require some assumptions on the diesel / air mixture. LapTimer retrieves the engine type from mode 1 pid 1 (DCT, see https://en.wikipedia.org/wiki/OBD-II_PIDs). In case the car delivers some wrong information here, it is possible LapTimer switches to the wrong engine type. I need to add I haven't seen this so far...

You can work around this by disabling 0101 in LapTimer's Expert Settings / OBD Tweaks (exclude PIDs).

- Harry

The engine type influences power and consumption calculation. Otto engines are easy to calculate from MAF (and MAP) while Diesel engines require some assumptions on the diesel / air mixture. LapTimer retrieves the engine type from mode 1 pid 1 (DCT, see https://en.wikipedia.org/wiki/OBD-II_PIDs). In case the car delivers some wrong information here, it is possible LapTimer switches to the wrong engine type. I need to add I haven't seen this so far...

You can work around this by disabling 0101 in LapTimer's Expert Settings / OBD Tweaks (exclude PIDs).

- Harry

I am glad to report that the workaround works well.
Horsepower calculation still points to a surprisingly high figures, but it is more sane for sure now. Diesel stays as diesel now.