will try to measure sensor voltage at diferent pressures, but from previouse logs, engine off or at idle the pressure was the same.

Ok, so, I did not measure voltage or anything else cause the problem is with a friend's car and we are some kms apart.

I really appreciate all your contribution, but, I don´t think that using anything but the calculated values for DSLOFS and DSLGRAD should be the correct approach. It should not be necessary calibration every time a stock sensor is replaced.

I got another sensor from a friend (known to be in working order) and is reading fine with the calculated values(658.82 and -63.52) so my assumption is that the sensor is just defective, probably could make it read correctly after measuring voltage/pressure but for now I will just throw in a replacement sensor.

thanks