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Note: This monitor evaluates EGR flow based on a change of engine roughness (idle stability).Ĭonditions causing un-stable idle will prevent this monitor from running. – A/C clutch, PS Switch and Cooling fans do not change state (turn off).ġ) Idle vehicle for five (5) minutes (to reach closed loop operation).Ģ) Drive with a steady vehicle speed between 40 & 60 mph for 2 minutes. – No misfire temporary (pending) or matured fault present. – Engine must have run at least 90 secondsġ) Idle vehicle for five minutes (to reach closed loop operation).Ģ) Drive with a steady vehicle speed between 30 and 45 mph for 2 minutes.ĮGR System Monitor Drive Trace – Vacuum controlledĢ) Drive with a steady vehicle speed between 40 & 60 mph for 8 minutes.ĮGR System Monitor Drive Trace – Electronic – Fuel level is between 15% and 85% full. Specific drive traces for Chrysler vehicles. Note: Due to the limited preconditions provided with this drive trace, NCVECS recommends using the monitor

– Cold start (Note: cold start temperature is undefined)ġ) Warm engine up for five minutes (must reach closed loop)Ģ) Drive (with steady throttle) at a speed between 40 and 60 mph for 8 minutes.Ĥ) Drive (with steady throttle) at a speed above 20 mph for 2 minutes.ĥ) Turn key off, leave off for ten minutes (to run O2 sensor heater monitor).