How to read diagnostic trouble codes for a dodge avenger. the smog technion failed my smog due to system malfution light obd2 not ready?

use handheld scanner you can buy one at Harbor Freight for $39.00 or go to autozone and have it scanned., Walmart $19.00 Codes are OBll and are available online free

https://www.autocodes.com/

https://repairpal.com/obd-ii-code-chart

Check for DTC'S - diagnostic trouble code's , if any , fix the problem . If no code's , do a drive cycle to see if monitor's set . The obd 2 system on your vehicle has monitor's. that check system operation .
OBD2 Car Diagnostics Blog
General Motors Driving Cycle

Most likely your best bet is going to be for you to take it to a quailfied repair shop that has a scan tool to check the system .

Your vehicle is equipped with an OBD II computer AND a link to connect OBD II computer to a Smog Check Analyzer or Data Scan Tool (available
at most auto part stores).There are two types of codes, bad codes and good codes. The good codes are the "Readiness Flags". These Readiness Flags
indicate that certain emissions systems which the OBD II computer has been monitoring have PASSED the test, indicating that those systems are
working properly. Then there are the bad codes. The bad codes are actual "Trouble Code". These codes indicate that the OBD II computer
has detected a problem with in the emissions system. The Trouble Code will specifically indicate the component and problem which was found.
Newer vehicle's have very complex codes in the thousands.
"Readiness Flags" do not cause the "Check Engine" light to illuminate, but may cause a vehicle to fail the smog test.
In order to set all the proper "Readiness Flags" the OBDII system must complete at least one drive cycle (in some cases
two or three). A drive cycle is a sequence of internal tests which the OBDII computer runs while your vehicle is being driven. This insures
all emissions systems are functioning properly. Only then will your vehicle pass the smog inspection. A drive cycle usually requires one
week of driving.

Take it to autozone or another place like it and have them read the codes and tell us what they are.

Have the fault codes read and that will point to the faults that caused the problem

Put OBD2 Codes followed by the number into google

You can read all day long

Then study obd2 systems

Codes do not tell you what is wrong
& never to replace anything

Codes are used with diagnostic factory
manuals & trouble charts to COMPONENT
TEST never replace a thing until they fail a test
& you find a system fault

EACH CAR IS DIFFERENT ,THIS IS CALLED DRIVE CYCLE.ALL OBD 2 MONITORS ARE NOT READY YET

A drive cycle is a test that the on board computer performs while you drive the car to prove out all the systems on the car that control tailpipe emissions, if it finds a problem it will trigger a check engine light and and the drive cycle will not complete. The correct name of this is the "OBD2 ELECTRONIC ENGINE CONTROL DRIVE CYCLE TEST". "OBD2" is short for On Board Diagnostics generation 2. The test is just driving the car at various speeds, stop and go traffic and idle time, make sure you have at least 5 gallons of gas in the tank as well. Many folks disconnect the battery to clear a Check Engine light when a smog is due, this resets the computer (known as the PCM) and then you must complete a OBD2 drive cycle, which of course will turn the Check Engine light back on.

As you probably know by now there is no way to pass an emissions test as long as the check engine light is on....Your car is what they call an OBD2 system... You need to have the diagnostics codes pulled by a special tester specifically for OBD 2 systems... Once codes are pulled fix if necessary any problem and have the codes cleared... This will turn the check engine light off an enable you to pass smog providing your car is running properly...

it means your cars computer is pumping too muchgas into your motor because it thinks the engine is either running lean possibly due to faulty o2 sensors or that the coolant temp sensor is giving false readings and the ecm thinks the car is still too cold.