Chrysler
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    No Crank Reference Signal to PCM Conditions
Cause:
    Engine cranking, then test started and the PCM did not detect any CKP sensor signals although CMP sensor signals were present (conditions met for over 2 seconds).

Ford
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Ignition Engine Speed Circuit Conditions
Cause:
    Engine running, then the PCM detected two successive erratic PIP signals

Generic
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Ignition/Distributor Engine Speed Input Circuit