Question about Ford Ranger

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I have a ford ranger 2001 V6 3.0 I have been trying to smog since feb. we did a valve job/replaced the mass air flow sensor/replaced the computer/sychronizer/ had the sychronizer reset have driven truck 600 miles and have 4 monitors not reset,oxygen sensor heater monitor,secondary air injection system monitor,catalyst efficiency monitor,oxygen sensor monitor and or evap monitor 4 of these monitor won't reset after about 600 miles of driving check engine light is not on, What to do!!

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  • ed Cosgrove Jul 21, 2010

    Tell me how to get the monitors to reset I don't have any codes only monitors that don't reset!!

  • ed Cosgrove Jul 23, 2010

    Thank you for all the info it really helped!



2 Answers

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  • Ford Master
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The system has not reset, it is not how many miles u drive but how u drive them, it takes special types of driving for the system to complete self testing and clear drive not complete which is a code P1000, here is the Ford service manual drive cycle and what be done to clear it and reset the system.

Ford Motor Company Driving Cycle Description of OBDII Drive Cycle
The following procedure is designed to execute and complete the OBDII monitors and to clear the Ford P1000, I/M readiness code. To complete a specific monitor for repair verification, follow steps 1 through 4, then continue with the step described by the appropriate monitor found under the "OBDII Monitor Exercised" column. When the ambient air temperature is outside 4.4 to 37.8°C (40 to 100° F), or the altitude is above 2438 meters (8000 feet), the EVAP monitor will not run. If the P1000 code must be cleared in these conditions, the PCM must detect them once (twice on some applications) before the EVAP monitor can be "bypassed" and the P1000 cleared. The Evap "bypassing" procedure is described in the following drive cycle.

  1. Most OBDII monitors will complete more readily using a "steady foot" driving style during cruise or acceleration modes. Operating the throttle in a "smooth" fashion will minimize the time required for monitor completion.
  2. Fuel tank level should be between 1/2 and 3/4 fill with 3/4 fill being the most desirable.
  3. The Evaporative Monitor can only operate during the first 30 minutes of engine operation. When executing the procedure for this monitor, stay in part throttle mode and drive in a smooth fashion to minimize "fuel slosh".

Posted on Jul 21, 2010

  • 5 more comments 
  • ed Cosgrove Jul 21, 2010

    This is exactly what I'm looking for but all that came thru was the directions 1,2,3 for evap not the other monitors. pleaSE INCLUDE ALL OF THE DRIVING TIPS!!

  • Marvin
    Marvin Jul 21, 2010


    OBDII Monitor

    Drive Cycle Procedure

    Purpose of
    Drive Cycle Procedure

    Drive Cycle
    1. Install scan tool. Turn key on with the engine off. Cycle key off, then on. Select appropriate Vehicle & Engine qualifier. Clear all DTC's/ Perform a PCM Reset.
    Bypasses engine soak timer. Resets OBDII Monitor status.

    2. Begin to monitor the following PIDs: ECT, EVAPDC, FLI (if available) and TP MODE.
    Start vehicle WITHOUT returning to Key Off.

    3. Idle vehicle for 15 seconds. Drive at 64 Km/h (40 MPH) until ECT is at least 76.7°C (170° F).

    Prep for Monitor Entry
    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.
    Engine warm-up and provide IAT input to the PCM.

    5. Cruise at 64 Km/h (40 MPH) for up to 4 minutes.
    Executes the HEGO monitor.

    6. Cruise at 72 to 104 Km/h (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%
    Executes the EVAP Monitor (If IAT is within 4.4 to 37.8° (40 to 100°F))

    7. Drive in stop and go traffic conditions. Include five different constant cruise speeds, ranging from 40 to 72 Km/h (25 to 45 MPH) over a 10 minute period.
    Executes the Catalyst Monitor.

    8. From a stop, accelerate to 72 Km/h (45 MPH) at 1/2 to 3/4 throttle. Repeat 3 times.
    Executes the EGR Monitor.

    SEC AIR/CCM (Engine)
    9. Bring the vehicle to a stop. Idle with transmission in drive (neutral for M/T) for 2 minutes.
    Executes the ISC portion of the CCM.

    CCM (Trans)
    10. For M/T, accelerate from 0 to 80 Km/h (o to 50 MPH), continue to step 11. For A/T, from a stop and in overdrive, moderately accelerate to 80 Km/h (50 MPH) and cruise for at least 15 seconds. Stop vehicle and repeat without overdrive to 64 Km/h (40 MPH) cruising for at least 30 seconds. While at 64 Km/h (40 MPH) , activate overdrive and accelerate to 80 Km/h (50 MPH) and cruise for at least 15 seconds. Stop for at least 20 seconds and repeat step 10 five times.
    Executes the transmission portion of the CCM.

    Misfire & Fuel Monitors
    11. From a stop, accelerate to 104 Km/h (65 MPH). Decelerate at closed throttle until 64 Km/h (40 MPH) (no brakes). Repeat this 3 times.
    Allows learning for the misfire monitor.

    Readiness Check
    12. Access the ON-Board System Readiness (OBDII monitor status) function on the scan tool. Determine whether all non-continuous monitors have completed. If not, go to step 13.
    Determines if any monitor has not completed.

    Pending Code Check and Evap Monitor "Bypass" Check
    13. With the scan tool, check for pending codes. Conduct normal repair procedures for any pending code concern. Otherwise, rerun any incomplete monitor.
    Note: if the EVAP monitor is not complete AND IAT was out of the 4.4 to 37.8° C (40 to 100° F) temperature range in step #4, or the altitude is over 2438 m. (8000 ft.), the Evap "bypass" procedure must be followed.
    Proceed to step 14.
    Determines if a pending code is preventing the clearing of P1000.

    Evap Monitor "Bypass"
    14. Park vehicle for a minimum of 8 hours. Repeat steps 2 through 12. DO NOT REPEAT STEP 1.
    Allow the "bypass" counter to increment to two.

  • ed Cosgrove Jul 22, 2010

    Thanks I try this and get back to You.

  • Marvin
    Marvin Jul 22, 2010

    I went to allot of trouble getting this info for u, please rate the solution for fixya or i get no credit for my effort. Thanks

  • ed Cosgrove Jul 22, 2010

    I took your instructions to my son the new smog tech after looking them over he confered with an plder associate who told him "after driving 500 miles the truck would have to go to a ford dealer and have the computer "sparked" I would like to hear your thoughts on this idea. The computer in this truck came from a wrecked truck and was sparked when it was installed in my truck by an emissions teacher!

  • ed Cosgrove Jul 22, 2010


  • Marvin
    Marvin Jul 22, 2010

    It is not called sparked, it is called a re-flash, that is when you up date the EPROM memory chip in the powertrain control module to the latest programming using a special piece of equip called an SBDS (Service Bay Diagnostic System), there may or may not be updated programming, but regardless of the program release date the system should prove out without a memory flash. I am a retired Ford factory certified Master electronics tech, this type of work is all i did, do the drive cycle exactly as outlined, here is a link to the page where this drive cycle came from, will be easier than the way the copy and paste came out.. Go to the link for the drive cycle instructions


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  • Ford Master
  • 6,927 Answers

Have the codes cleared with a code reader or scanner.

Posted on Jul 20, 2010

  • 3 more comments 
  • ed Cosgrove Jul 21, 2010

    I have had the codes cleared by a smog tech twice I have driven this truck about 600 miles on the hiway and stop and go, the check engine lite has not come back on. I was given some driving info by a tech on what type and how long to drive thetruck to clear each monitor I still have 4 monitors flashing(not reset) in california you are now only allowed to have i monitor flashing (not reset) Again what can I do??

  • ed Cosgrove Jul 21, 2010

    The monitors don't clear I have not recieved any codes for awhile I need to know how to drive the truck or what todo to get the monitors to reset so I can smog the truck!!

  • ed Cosgrove Jul 21, 2010

    I don't have any codes I need to know how to get the Monitors to reset so I can smog the truck!

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jul 21, 2010

    They will have to reset the monitors with the scan tool .

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jul 22, 2010

    They will have to reset the monitors with the scan tool .



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