Autophix OM123: Check engine fault OBD2/CAN code reader review

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Autophix OM123 is a beginner’s level diagnostic code reader. It is designed with the average car owners in mind as it is very straightforward to use.

The plug-and-play code reader can quickly retrieve codes and define them on the screen.

Autophix OM123 vs. OM121 vs. OM126 comparison chart

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Autophix OM121
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Autophix OM126P
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Customer Rating
PriceAUTOPHIX OM123 priceAutophix OM121 priceAutophix OM126P price
Package Dimensions9.5" x 7" x 1"5.5" x 2.6" x 1.1"9" x 1.5" x 6.4"
Item Weight10.4oz8.8oz11.2oz
Read and Clear Codes
Reset Check Engine Light
Retrieve VIN, CIN, CVN
I/M Readiness Test
Live Data Stream--
View Freeeze Frame Data--
O2 Sensor Test----
EVAP Systems Test----
On-board Monitor Test----
Print Data to PC----
Bottom LineAutophix OM123 is for any car owners who want to read and clear DTCs.Autophix OM121 suits any beginners to turn off the MIL.Autophix OM126P is for young average car owners or DIYers.
Here's where you can get an in-depth review of the Autophix OM123
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Autophix OM123 overview

autophix om123 review
Autophix OM123: Check Engine Fault OBD2/CAN Code Reader
The Autophix OM123 OBD2 scanner is a Check Engine Fault OBD2/CAN Code Reader, it allows car owners to check the state emission monitor status of the car, and solve basic engine problems quickly and efficiently.

Even better, the code reader has a large screen that allows you to read codes comfortably.

The screen has a resolution of 128×64 pixels, making the codes more eligible.

Besides, the LCD screen has a white background to contrast the diagnostic codes. All these modifications are designed to enhance the readability of the codes.

Autophix OM123 can accurately retrieve the I/M readiness tests. At the same, it can quickly read and clear the check engine light.

Here is an in-depth review of Autophix OM123 that features strengths and weaknesses.

Detailed review of Autophix OM123

Features and functionality

Autophix OM123 is designed with simplicity and efficiency for average car owners. Enlisted are the key features and functionality.

Clear the check engine light


Autophix OM123 can quickly connect to a vehicle onboard computer to retrieve diagnostic codes.

As a result, you will be able to effectively determine the cause of the check engine light before repairing it.

It displays the codes and subsequently defines each code on the screen, making it possible for the average car owner to determine the cause of the check engine light accurately.

Once you have established the possible cause, you can fix it if you are DIY.

On the other hand, you can have the vehicle repaired by your mechanic if you are not in a position to repair your car.

There is an advantage of scanning your car before taking it to a mechanic.

One reason is being able to know the fault and an estimated cost of repair.

As a result, you will not incur the unnecessary cost of repair.

Once the fault is fixed, Autophix OM123 can effectively help you determine if the repair is complete.

Subsequently, the code reader will turn off the check engine light.


This code reader can only clear check engine lights on basic issues. The code reader is not designed to diagnose advanced problems.

Performs I/M readiness test


If you are concerned about passing the annual smog test, then it is advisable to scan your car before taking it for a test.

Luckily Autophix OM123 can help you ascertain the smog readiness status of your car.

The code reader can retrieve different emission diagnostic trouble codes.

First, you can retrieve diagnostic trouble codes indicating that your car is in good condition.

It means that your car will be able to pass the smog test.

Secondly, you can retrieve codes indicating that there are pending codes that should be clear first.

The good news is that you can scan the entire vehicle and clear the pending issues using this code reader.

Even better, the code reader will help you to determine when all the emission issues are resolved.

If your car has a severe emission problem, the code reader will retrieve corresponding DTCs.

It is advisable to take the car to a mechanic or fix the emission issues yourself if you are a DIY.

Once you have fixed all the emission problems, you can turn off the MIL lights with Autophix OM123.


This code reader does not provide an explicit I/M readiness status like the counterpart code readers that use LED display.

OBD2 code reader look up the library


Autophix OM123 code reader is primarily built for average car owners.
Autophix OM123 is designed to really make the diagnostic process easy.

Autophix OM123 is designed to really make the diagnostic process easy.

You will see that this code reader has a diagnostic trouble code lookup the library.

The library has hundreds of codes and their definitions.

Whenever you scan your car and retrieve diagnostic trouble codes that are strange, you can always look them up in the library.

This feature helps to define the code and suggests possible repair solutions.

As a result, it makes it possible for you to establish the cause of check engine light without necessarily being a mechanic.

In the long run, you will end up saving time as well as money.


The library lookup is only limited to basic diagnostic codes.

Retrieve VIN incompatible vehicles

Are you looking to buy a used car?

If yes, then the first thing that you should consider is getting records of the used car.

One way of retrieving a reliable history of a car is by first retrieving its VIN.

Fortunately, Autophix OM123 can conveniently retrieve the VIN of a vehicle.

Once you’ve retrieved the VIN, you can do a search to determine the history of that car.

The most outstanding aspect is that it can accurately retrieve VIN incompatible vehicles.


In most cases, the code reader may fail to establish a connection on vehicles listed as compatible.


The first thing that you will notice when it comes to this code reader is the broad compatibility.

Autophix OM123 is compatible with all OBD2 compliant vehicles from the US, Asia, and EU. All the OBD2 cars manufactured after 1996.

Therefore, it means that you can retrieve the code and clear the Check Engine Lights using Autophix OM123.

It is also compatible with all the OBD II protocols, including the latest CAN protocol.

Besides, it supports multiple languages with English, German, French, and Spanish included.


  • It’s straightforward to use.
  • It has buttons that allow easy navigation.
  • The large screen makes it possible to read codes easily.
  • It is relatively cheap.
  • This code reader is multilingual.
  • It can reset monitors and read the check engine light.
  • It retrieves historical and pending codes.


  • It does not support advanced functions such as ABS and oil reset functions.
  • It is not updateable and can retrieve outdated codes.
  • It fails to retrieve VINs and I/M readiness status in vehicles that it claims to read.
  • It does not retrieve codes in many vehicles it claims to cover.
  • Although it has a large screen, the codes are displayed in tiny letters.
  • It claims to read live data but fails in most vehicles.

Who is it built for?

Autophix OM123 is primarily built for average car owners.

It has a large screen that makes the reading of diagnostic codes very easy.

At the same time, it has four buttons for ease of navigation and clearing codes.

Therefore, these features make this code reader ideal for average car owners who want to find a cause of Check Engine Light.

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The bottom line

Autophix OM123 has been designed to be user-friendly. It has buttons that make navigation very easy.

At the same time, it has a large screen to enhance readability.

As a result, average car owners can comfortably perform the most basic functions using Autophix OM123.

However, it only supports a few basic functions and should be used with other diagnostic tools for a more comprehensive diagnosis.

A video of Autophix OM123

Read more: ATDIAG AT330: OBD2 Engine Code Reader Review

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