Volvo vehicles can achieve better engine performance through modifications to factory-installed performance values. Chip tuning or remapping procedures alter the data stored on a computer chip located in the Engine Control Unit, or ECU. The alterations mean better overall performance, better MPG, and a smoother, more powerful drive.
With remapping, the reading of data stored on the ECU chip and changing it to better the vehicle's performance is accomplished through your vehicle's on-board diagnostics through the OBD/OBDII port. Remapping can be done on Volvo models dating from 2000. For pre-2000 Volvos, chip tuning is a similar performance-enhancing process designed to enhance your ride.
Chip tuning requires removing the ECU from the Volvo and changing the data on the EPROM chip in the ECU to improve the vehicle's efficiency. Depending on the type of engine your Volvo has, performance can be improved by 15 percent to 30 percent over its initial performance. Performance gains from chip tuning and remapping are the same. The only difference is how the chips storing the performance data are accessed.