Readiness Sensor Tuning

As some of you may or may not already know, every time you unplug the battery in your vehicle and or flash the PCM with a new tune, all your sensors that require a drive cycle to complete a readiness status will now show as incomplete until you initiate the  drive cycle (without flashing the PCM or unplugging the battery) in between.

For some people who are constantly flashing in a tune and making changes to their cars, or for those of you who put very few miles on the car each year, this can be a major nuisance should you need to diagnose the vehicle or require the car to have the monitors in a ready state.

Below will show you how to set your sensors to a readiness state.

*** Disclaimer*** DO NOT USE THIS INFORMATION TO CHEAT EMISSIONS. CHEATING EMISSIONS IS ILLEGAL. USING THE BELOW INFORMATION FOR ILLEGAL PURPOSES MEANS YOU ARE DOING SO AT YOUR OWN RISK. PLEASE CHECK WITH YOUR LOCAL PROVINCIAL OR STATE LAWS BEFORE MODIFYING YOUR VEHICLES TUNE. WE ARE NOT RESPONSIBLE FOR DAMAGES OR COSTS INCURRED BY FOLLOWING THE BELOW GUIDE.

Since there are other reasons to need to set sensors to a readiness state other than illegally passing emissions, I will show you how to do so for the legal reasons – otherwise you’ll find yourself hiring a Houston criminal defense lawyer if you’re caught illegally passing your state’s emissions test if you live in Texas, or maybe just get slapped with a regular ticket in other states. In any event, I’m not responsible for how you choose to use this information.

First step in setting all sensors to ready is to verify which sensors your vehicle checks for, to do so, put the keys in your ignition, plug in your HP Tuners interface, start-up your VCM scanner, start your vehicle and begin scanning. Open your DTC tab as shown below and click the check mark to scan for readiness and DTC codes.

Readiness Sensors unready

Note how my particular vehicle has 3 sensors highlighted in red showing that they are unready? These are sensors that require a drive cycle to be completed in order to set them to a ready state, or you can force the situation with hp tuners.

Once you have identified which sensors your vehicle is looking for, (the ones that say either complete/incomplete only) you will have an idea of which codes you need to set to “No Error Reported” in your DTC list.

Take note, you don’t have to modify anything for the continuous tests so long as they already show complete, this is because regardless of whether you pull the battery and reset the pcm, your car will immediately check/run those tests the moment the car is started back up.

Alright, according to my above picture for my particular car, I am looking for all my O2 sensor and EGR related DTC/trouble codes. I’ve located them below:

O2 sensor DTC

Located the O2 sensors. Notice how I have changed them to “No error Reported” and left them checked to show an SES light? This is how you get the sensor to show as complete/ready status

I did the same thing for my EGR sensors, although they are not pictured above.

After you have have put the relevant sensors to “No error reported” do a “write calibration only” to program your tune into the pcm.

**Note: DON’T get lazy with setting your sensors to No error reported. You DO NOT want to set every DTC for every sensor in your car to No error reported. Sensors such as the MAF being set to this setting could cause the car to not run or go into limp mode. Only select those sensors which are relevant to the readiness tests which are listed in the “once per trip test window”

missed a few sensors

As you can see, after writing in the new tune, I have 2 complete readiness monitors and 1 incomplete. The reason for this is that I missed some of the O2 sensor DTC’s when I went through the list. No big deal, I’ll go back and find it.

O2 sensor No error

Found the rest of the O2 sensor DTC’s. Note that there are quite a few of them. Change all of them to no error reported

Alright, that should cover the remaining O2 sensors that were missed. Go ahead and re-write the pcm again with the new tune.

Write calibration only

Just showing a successful write, it takes about 36 seconds and all readiness monitors should be good to go. A lot quicker than you could drive through a drive cycle.

Readiness sensors ready

Success! All readiness sensors are now good to go.

For the record, in the above photo, I had unplugged the EGR just to prove that even with sensors not hooked up, by setting the DTC’s to no error reported, the ready monitors will show as complete and ready.

All right, now lets write the old tune back in (that you originally saved before you did this) and watch the sensors go back to incomplete.

writing the old test back in

Back to an incomplete state.

 

 

28 comments for “Readiness Sensor Tuning

  1. hadi moradi
    July 30, 2015 at 1:02 pm

    this a great information what is that we need to have ? what is it and where can we get one

  2. john
    November 5, 2015 at 12:14 am

    How do I buy this software and cable to hook up to the obd 2 port ? Will it work on every vehicle with no tune ?
    Please email…

    • Tech
      December 23, 2015 at 11:37 am

      emailed!

      • Mel
        March 11, 2016 at 4:02 pm

        I have the same question, Where do I get the software and will it work on any vehicle?

        • Raul
          December 9, 2016 at 8:00 pm

          did you get your answer?

      • William
        June 7, 2016 at 10:25 pm

        Same Question — What is the program and will it work on 2010 Volkswagen?

      • Isaac
        July 21, 2016 at 1:44 pm

        Hi can you please email me some info on the software and where to purchase please. Thanks!

  3. RAYMOND
    December 23, 2015 at 6:20 pm

    CAN YOU PLESAE GIVE ME INFO ON THE SOFTWARE AND CABLE AS WELL

  4. Roger Rosales
    January 5, 2016 at 4:03 am

    Can you email me where I can find this software?

  5. Ryan
    January 20, 2016 at 6:28 pm

    Same question!

  6. Bavar Tahir
    February 4, 2016 at 1:02 am

    Can you email me the source for the program and cable needed to preform this procedure?
    Bavar2005@yahoo.com

  7. Travis
    March 9, 2016 at 6:18 pm

    I would also like to know about software, connection cable and other requirements. Would Save Me A Bunch Of time.

  8. mike
    March 18, 2016 at 4:11 pm

    where do I buy this sofware also?

  9. zachary hui
    March 30, 2016 at 5:15 pm

    i am interested in this software for readiness tuning.. is there any information you can help me with? please email me back with any info.. thanks!!

  10. Chris Hernandez
    April 6, 2016 at 11:10 pm

    Im interested in this software please email me

  11. Alberto R.
    April 29, 2016 at 9:03 pm

    Would this work for Nissan and toyota?

  12. charles
    April 30, 2016 at 2:30 pm

    HI, where I can buy this software? and what I need to communicate with the car? Please let me know.
    thanks!!

  13. Scott
    September 12, 2016 at 8:39 pm

    I’m trying to set this up with a 2011 Mustang GT. But there is not SES in the software.

    • Tech
      January 11, 2017 at 10:18 pm

      Email sent and I requested to look at your file

  14. leo
    October 13, 2016 at 5:57 pm

    got my battery died n drove 500 miles the evap n catalyst still incomplete. please let me know where can I get this . Leo81486@gmail.com

    • Tech
      January 11, 2017 at 10:17 pm

      email sent

  15. IBRAHIM DAGHLAS
    October 29, 2016 at 3:44 pm

    I NEED TO KNOW TOO
    PLEASE E MAIL ME

  16. Raul
    December 9, 2016 at 11:39 pm

    Is there a software for Toyota?

    • Tech
      January 11, 2017 at 10:12 pm

      The software I am aware of and used is mainly for American cars- there may be something similar for Toyota available somewhere though!

  17. Frank Smith
    January 15, 2017 at 5:46 am

    Will this software work on a bmw if so email me what I need

  18. saul sanchez
    February 25, 2017 at 2:33 am

    I have the same question. Will the softwear work for bmw. Also were can I get the softwear

    • Tech
      February 25, 2017 at 3:01 pm

      Got the software from hptuners.com not sure of their capabilities but last I checked for the most part they were limited to American vehicles.

  19. Ken Thai
    February 28, 2017 at 12:51 pm

    Hi, can you please email me on how to get this software and cable? thanks very much

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