Chrysler
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Multiple Cylinder Misfire Detected Conditions
Cause:
    No PCM codes set, CKP sensor "learn routine" completed, engine running under 3000 rpm, then test started and the PCM detected over a 10-30% misfire rate with 2 cylinders misfiring (using 1-trip detection), or it detected a 2% misfire rate with 2 cylinders misfiring (using 2-trip detection). Test Base Engine and Ignition System components.

Ford
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Random Misfire Conditions
Cause:
    Engine running in a positive torque condition, then the PCM detected a random misfire in one or more engine cylinders (PCM could not identify which cylinder was misfiring).

Generic
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Random/Multiple Cylinder Misfire Detected

GM
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Engine Misfire Detected Conditions
Cause:
    Engine runtime over 90 seconds at idle speed, ECT sensor input more than 132°F, fuel adjustment more than a calibrated amount in the PCM, then the PCM detected multiple misfires had occurred

Nissan
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Random misfire
Cause:
    Wiring, mechanical fault, fuel system, EGR valve, injector, intake/ignition system, CKP sensor, HO2S front, ECM