Buy 1991 Volvo 780 Engine Crankshaft Position Sensor. Crankshaft Position Sensor A failed crankshaft FD, Cause - OEM Volvo Part # 271949

Engine Speed Sensor. Impulse Sensor.
A electronic device used in an internal combustion engine to monitor the position or rotational speed of the crankshaft while this information is used by engine management systems to control the fuel injection or the ignition system timing and other engine parameters.

ENGINE SPEED SENSO

Fits 240, 740, 760, 780, 940, 940 SE, 960

Crankshaft Position Sensor
A failed crankshaft position sensor will often cause your 1991 Volvo 780 to crank without starting or may cause it to die intermittently. If your check engine light is on as a result, our technicians can diagnose and repair the problem.