This code indicates that the engine computer has detected an open circuit in the wiring that carries the crankshaft position sensor's signal. Because the computer cannot read the crankshaft's position, it is unable to properly control fuel injection or ignition timing.
A broken, frayed, or disconnected wire in the crankshaft position sensor signal circuit is the most common cause of an open circuit.
Corroded, pushed-back, or loose terminals in the crankshaft position sensor or engine computer connectors can interrupt the signal path.
The sensor itself may have an internal open circuit, preventing it from generating or sending the voltage signal.
The engine wiring harness may be chafed or rubbed through against a sharp engine component or bracket, severing the wire.
The engine computer may have an internal open or failed driver in the crankshaft signal circuit, though this is extremely rare.
Rarely. Drivers and some mechanics are often quick to blame the PCM for signal circuit codes, but an open circuit almost always means a broken wire, bad connector, or failed sensor. The PCM is the least likely cause and should only be replaced after all wiring and the sensor are thoroughly proven to be intact and functional.
It is highly unlikely. Without a crankshaft position signal, the engine computer does not know when to fire the spark plugs or fuel injectors, which usually results in a no-start condition or sudden stalling.
It is the specific wire and connector path that sends the crankshaft position sensor's voltage readings to the engine control module. An 'open' means there is a physical break somewhere in this path, stopping the electrical flow.
Fixing an open circuit is usually straightforward and inexpensive if the broken wire or bad connector can be physically located and repaired. However, tracing the break through a complex, tightly bundled engine wiring harness can sometimes be time-consuming.