Generic
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Timing Reference High Resolution Signal "A"

GM
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Timing Reference, High-Resolution Conditions
Cause:
    Engine running, then the PCM detected that a number of high-resolution signals were missing for every 8 CMP reference signals