I have recently seen that my vehicle, namely an om642, is exhibiting unusual behaviour. Typically, it takes a significant amount of time to reach a speed of 80. The only effective method seems to be increasing the engine's revolutions per minute. However, today the temperature reached around 70 degrees and thereafter dropped to 0 for the remainder of the trip. After a restart it began operating again, however given the figures it shows am not convinced it is particularly accurate. Would an OBD scanner provide any real-time data for comparison?
