When Monitored

This diagnostic runs continuously when the following conditions are met:

• The countdown timer has reached zero and the following enable conditions are met.
  • No active DTCs for the Fuel Injectors, Ignition Coils, or Upstream O2 Sensor faults.
  • Upstream O2 Sensor voltage is above a calibrated threshold.
  • Air/fuel ratio must not be rich of stoichiometry, for a calibrated amount of time.