The EVAP monitor is usually the most difficult to complete on most vehicles. On your Ford F-250 the Evaporative Monitor will only operate during the first 30 minutes of engine operation. When executing the procedure to complete the EVAP monitor make sure to at all times stay in part throttle mode and drive in a smooth fashion to minimize "fuel slosh"; per Ford Motor Company.
The following is the entire drive pattern required to complete all the Emission Monitors and set the required readiness flags on your Ford F-250 Pickup Truck: (a OBD II Scan Tool will be required)
1. Install scan tool. Turn key on. Do not start engine. Turn key off, then on again. Using scan tool, clear all digital trouble codes and perform a ECM (engine computer module) reset.
2. Start your FORD F-250 WITHOUT returning to Key Off position.
3. Idle your truck for 15 seconds. Begin to drive at 40 MPH until ECT (engine coolant temperature sensor is at least 76.7°C (170° F). You will be able to monitor these parameters via your scan tools streaming data settings.
4. Is IAT within 4.4 to 37.8°C (40 to 100° F)? If Not, complete the following steps but, note that step 14 will be required to "bypass " the Evap monitor and clear the P1000.
5. Cruise at 40 MPH for up to 4 minutes. This step executes the HEGO Monitor.
6. Cruise at 45 to 65 MPH for 10 minutes (avoid sharp turns and hills) Note, to initiate the monitor: TP MODE should =PT, EVAPDC must be >75%, and FLI must be between 15 and 85%. This step executes the EVAP Monitor.
7. Drive in stop and go traffic conditions. Include five different constant cruise speeds, ranging from 25 to 45 MPH over a 10 minute period. This step executes the Catalyst Monitor.
8. From a stop, accelerate to 45 MPH at 1/2 to 3/4 throttle. Repeat 3 times. This step executes the EGR Monitor.
9. Bring your truck to a stop. Idle with transmission in drive (neutral for Manual Transmission) for 2 minutes.
10. For Manual Transmission, accelerate from 0 to 50 MPH, continue to step 11. For Automatic Transmission, from a stop and in overdrive, moderately accelerate to 50 MPH and cruise for at least 15 seconds. Stop vehicle and repeat without overdrive to 40 MPH cruising for at least 30 seconds. While at 40 MPH , activate overdrive and accelerate to 50 MPH and cruise for at least 15 seconds. Stop for at least 20 seconds and repeat step 10 five times.
11. From a stop, accelerate your FORD to 65 MPH. Decelerate at closed throttle until 40 MPH (do not use brakes). Repeat this procedure 3 times.
12. Access the ON-Board System Readiness (OBDII monitor status) function on your scan tool. Determine whether all non-continuous monitors have completed. If not, go to step 13.
13. With the scan tool, check for pending trouble codes. Conduct normal repair procedures for any pending trouble code concern. Otherwise, rerun any incomplete monitor.
Note: if the EVAP monitor is not complete AND IAT was out of the 40 to 100° F temperature range in step number 4, or the altitude is over 8000 ft., the EVAP "bypass" procedure must be followed. Proceed to step number 14.
14. Park your FORD F-250 Truck for at least 8 hours, and repeat steps 2 through 12. DO NOT REPEAT STEP 1, or else you will clear the emission monitors which have already completed.
