Ford
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Crankshaft Position Sensor Circuit Conditions
Cause:
    Engine running, then the PCM detected a fault in the Misfire Detection circuit

Generic
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Crankshaft Position Sensor "B" Circuit

GM
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Crankshaft Position Sensor 'B' Circuit Conditions
Cause:
    Engine speed over 20 rpm, MAF sensor input more than 2.5 g/sec, then the PCM detected a loss of the CKP Sensor 'B' signal