Question about 2001 Chevrolet S-10

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After clearing all im monitor codes and driving

After clearing all im monitor codes and driving hundreds of miles doing numerous gm driving cycles the secondary air and evap monitors read not ready . i know the air pump works ;there are no blown fuses , i have vacuum from the solenoid valve and the relay is good .all other im monitors read ready or n.a.if i unplug the pcm will this have the same effect as rebooting a computter?

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  • dstead223 Feb 08, 2010

    if the pump was bad would the secondary monitor throw a code all mine does is read not ready.all o2 monitors read ready.when i unplugged pump and jumped it to battery pump ran fine.what really has me stumped is if there is a problem in the system why am i not getting a fault code instead all i am getting is not ready.the evap monitor reads not ready as well are these systems tied together in sequence or are they independent of each other ? thank you

  • dstead223 Feb 08, 2010

    thank you for your suggestion i checked both the 30amp maxi fuse and the 10amp mini fuse for continuity and both are good can you think of any other open circuit possibility? thanks again.

  • dstead223 Feb 08, 2010

    there are no fault codes. the air and and evap monitors both read not ready. i thought maybe a bad scan tool.but confirmed with another tool

  • dstead223 Feb 08, 2010

    ok i will.is the evap always last to come back to (ready)thank you.

  • dstead223 Feb 09, 2010

    i drove another 111miles did another 15 driving cycles in just the last 2 days i have drivin 226 miles and done 23 driving cycles.is there anything more i can do so the system proves out?thank you.

  • yadayada
    yadayada May 11, 2010

    THEN U MUST DRIVE IT UNTIL THE SYSTEM PROVES OUT

  • yadayada
    yadayada May 11, 2010

    what is the fault code here, you are not providing any useful info to help u here.

  • yadayada
    yadayada May 11, 2010

    U have no idea about what u are doing here, if there is a problem in the secondary air injection the code will keep coming back, replace the secondary air injection pump.

  • Anonymous Mar 14, 2014

    How many miles do I need to drive inorder for my evap sensor to read ready

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No this will not. Computer has a keep alive . Evap and a.i.r. run on different schedules then other monitors.Usually EVAP is gas tank related.Have some smoke system to see if there are any leaks. In NY you can pass with monitor not running for that year truck

Posted on Feb 08, 2010

Testimonial: "thank you for your reply it was helpful to know the pmc has to be kept alive."

  • Patrick OCarroll
    Patrick OCarroll Feb 08, 2010

    Ok....look on passenger side,you are searching fro a fuse,MAXI,30 amp.Check to see if that is blown,running to the battery is going to make any motor spin. If that fuse is blown,repace air pump. That is why it codes back again. Circut not complete,

  • Patrick OCarroll
    Patrick OCarroll Feb 09, 2010

    At this point,drive until monitor sets.If it faults out again,then you are going to have to get into wiriing harness,not somehting for the backyarder to tackle.Unless your an electrcian of course.More on that someother time.Good luck

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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.
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