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

GM
Type:
    Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description:
    Dl Ignition Low-resolution Circuit Intermittent Conditions
Cause:
    PCM detected an interruption in Dl optical distributor low or high-resolution signals This code can be caused by a misfire condition