Mode $06 is definitely an superior diagnostic mode within the onboard diagnostic (OBD II) system on 1996 and newer cars that keeps view on how all the sensors and also other emission management elements are working. It might only be accessed using a skilled grade scan instrument, and needs scan tool program that can convert the hexadecimal (16-bit computer code) into ordinary numbers and values. Put simply, it truly is an superior diagnostic mode that could reveal the internal workings from the OBD II system, and may let you know each time a code is going to set even ahead of it sets the code and turns within the Test Engine light. An affordable code reader or fundamental scan instrument cannot access or study mode $06 data.

Ordinarily, most technicians dismiss mode $06. On older scan resources, it was extremely tough to access. And if they identified it, the hexadecimal code looked like gibberish. You needed to use conversion tables to translate the code into ordinary numbers, and also you had to find the car manufacturer’s reference codes to decipher what each line meant. So it was a soreness to work with, and many technicians did not even know it existed.

As time went on, scan tool makers began to add software program to their equipment that produced Mode $06 much easier to uncover a use. Several skilled grade scan resources now show all the mode $06 data in plain English with units of measure for several types of information (pressure, temperature, etc.). Some will even flag in red values which are from variety, making it a great deal much easier to spot challenges that will set a code.

The best value of mode $06 from a diagnostic standpoint is the fact that it could possibly verify repairs have fixed an issue without needing to wait days for particular OBD II self-tests to run.

To generate certain a vehicle’s emissions don’t exceed federal limits, the OBD II system runs numerous self-checks (referred to as “monitors”) while the car is staying driven. Some of these monitors are “continuous” and monitor a number of sensors and systems all of the time. Other monitors (referred to as “non-continuous” monitors) only run following particular operating problems are already met. As a result, non-continuous monitors may well be slow to finish their self-checks, and might not set a fault code for a number of days and even weeks after a fault happens. So becoming ready to verify a repair has fixed an issue without having to wait for the Check out Engine light to possibly come back on is often a god way for repair outlets to scale back comebacks and unhappy customers.

Mode $06 is most beneficial for checking misfires on Fords, and for checking the catalytic converter and evaporative emissions (EVAP) system on most cars. The latter two are non-continuous monitors and may be really slow to complete relying on driving disorders.

A automobile which has to consider a plug-in OBD II emissions test is not going to be accepted for testing unless All of the OBD II monitors have run and finished. What is additional, it won’t pass the check if any fault codes are found while in the powertrain control module (PCM) memory. So clearing any codes just just before taking an OBD II check will not do you any superior mainly because your car might be rejected right up until each of the monitors have run and every thing has passed the self-checks.

Mode $06 isn’t a thing your common motorist has ever heard of, and number of do-it-yourselfers possess the type of skilled grade scan tool or factory scan tool that may be essential to read the mode $06 data. But professional technicians who are up-to-speed on OBD II and therefore are very good at diagnosing emission faults must be mindful of mode $06 and understand how to access and use it.

How Mode $06 Information is Displayed

On older scan tools, every one of the mode $06 information is in hex code without any units of measure defined. The information is listed in three columns:

* “TID” stands for Check identification. This is the sensor or component that is becoming monitored on that line.

* “CID” stands for Component identification. This is actually the test outcome for that sensor or element.

* PASS or FAIL from the last column indicates if the worth is inside of assortment or from assortment (less than the minimal acceptable worth or greater than the optimum acceptable value for that sensor or element).