Question about 2001 Chevrolet S-10

1 Answer

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?

Posted by on

  • 7 more comments 
  • 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 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 there anything more i can do so the system proves out?thank you.

  • yadayada
    yadayada May 11, 2010


  • 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



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 83 Answers

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



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

No codes but EGR valve will not reset

Do you see a warning light ? The first step is always checking for stored OBDII fault codes.

If you cleared codes and one monitor will not set up after driving for 250 miles a code should be logged for that system failure.

Here is a previous fixya post describing the monitor set up drive cycle.
What is the drive cycle to reset computer on 2001 chey impala 3 8l v6

Aug 10, 2017 | Chevrolet Impala Cars & Trucks

1 Answer

Evap code for 1996 Nissan pickup

All you have been doing is clearing the check light on dash &
clearing the obd codes,not diagnosing anything related to
the codes or trying to solve the problem

The Evap Monitor will run when ever it should, based on how
that is programmed into the vehicles computer,no need to drive
80 miles or any miles

You should have a codes for the Evap Problem, if you stop clearing them & that also has nothing to do with an EGR Issue

Oct 17, 2012 | 1996 Nissan Pickup

1 Answer

Battery was disconntected to replace a connector now computer is 'not ready' and failed emissions test. driven it over 600 miles since then. Tried to follow steps to complete a 'drive...

Do you have a service engine light on or does the smog station tell you that the monitors are set?
A drive cycle won't clear a service engine light if the reason for it was not fixed. Normally a drive cycle or a 25 or so mile drive will be enough for the PCM to run through its test, and if all is well, clear the monitors.
Now some shop scanners and code readers can clear the monitors. Actron is one of the code readers that I know of that will clear monitors (the newer models. older ones did not). They are about $75 for the basic code reader and may be a worthwhile investment for the do it yourselfer.
Auto Zones also have code readers and if theirs is capable may do it for you. Though if you're in California I have heard they don't do that any longer due to people getting codes cleared just before a smog test without fixing the issue first.

Sep 09, 2011 | 2000 Saturn Ls 4dr Sedan

1 Answer

How do i fix my 2003 impala the speed ometer says im going 70mph when im not even moving, and when im driving it reads 120 mph when im clearly only doing about 30mps , i only have 29000 miles

Hello: Sir the electronic cluster has failed. You will have to go to a GM dealership They will have to order you a replacement cluster. After the new cluster is installed it will have to be programmed with a gm scanner.

Dec 03, 2010 | 2003 Chevrolet Impala

1 Answer

The check engine light came on found out it was the gas cap. I replaced the gas cap now how do I get it to reset itself to get the check engine light to go off

Drive it through a couple of drive cycles. Usually you will meet the drive cycle criteria within a couple hundred miles or less. Or you can go to an auto parts store like Auto Zone and they will clear the code for free.

Sep 24, 2010 | 2003 Hummer H2

1 Answer

Engine check light is on. computer code PO451 Can any one tell me what this is and what i need to do to fix the issue

It is a fuel tank pressure sensor code. Most commonly it is a fuel cap that wasn't put back on after refueling. If this sounds right, make sure the cap is on correctly and drive. After qa few hundred miles or less it should go out on it's own. Or you can clear the code and see if it stays off for the next few hundred miles. That is the most common cause for this. Check your mileage. You are probably still under the federal emissions warrant period. If this is the case and it is not just a fuel and even if it is, you can return to the dealer for a free repair. It's free to you but they still get paid by GM through the submission of a warranty claim. Don't feel bad to go to any dealer for this. It is an emission related issue and should cost you nothing if you are still in the emission warranty period. I'm pretty sure it's 6 years or 80,000 miles but my memory of GM warranty has faded.

Sep 23, 2010 | 2008 Chevrolet Silverado 1500

2 Answers

What is drive cycle miles to make ready emission test on ford f150 5.0 engine?

a drive cycle is not measured in miles driven but in the type of driving done, here is a ford drive cycle procedure to clear the not ready code.

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.
The OBDII Drive Cycle will be performed using a scan tool. Consult the instruction manual for each described function. NOTE: A detailed description of a Powertrain Control Module (PCM) Reset is found in this section, refer to the table of contents.
Drive Cycle Recommendations:
  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".

For best results, follow each of the following steps as accurately as possible:

Jun 05, 2010 | 1996 Ford Explorer

1 Answer

Obd not ready won't pass inspection

It usually takes more than one drive cycle to clear all monitors to "ready".The vehicle may take multiple "from cold" drive cycles and hundreds of miles to clear all.Drive normally with varied driving and include long coasting down stops.Buy a cheap scan tool ($35) and check monitors as you drive.
DO NOT CLEAR CODES or run the battery dead or you will have to start over!

May 29, 2017 | 2001 Pontiac Grand Am SE

Not finding what you are looking for?
2001 Chevrolet S-10 Logo

1,118 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

80417 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides