The 2007 Honda Accord crankshaft position sensor is located at the right rear side of the engine cylinder block. This sensor is designed to make sure that the crankshaft is working in an optimal manner. If the sensor is not working right then the amount of fuel being injected into the system will not be correct,leading to the car running either lean or rich. This can lead to a number of issues,including stalling,rough driving,loss of power,and surging. All of this will lead to extended strain on the engine,and over time will lead to the engine braking down. For this reason,You should fix the sensor quickly if it goes bad,as it is a relatively cheap thing to replace.