
Autophix OM121 is an excellent entry-level diagnostic tool. It offers you the opportunity to diagnose the check engine light quickly.
Autophix OM121 Vs. OM123 Vs. OM126 Comparison Chart
![]() AUTOPHIX OM121 | ![]() AUTOPHIX OM123 | ![]() AUTOPHIX OM126 |
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Customer Rating | ![]() | ![]() | ![]() |
Price | ![]() | ![]() | ![]() |
Product Dimensions | 5.5" x 2.6" x 1.1" | 9.5" x 7" x 1" | |
Item Weight | 8.8oz | 10.4oz | |
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 Line | Autophix OM121 suits any beginners to turn off the MIL. | Autophix OM123 is for any car owners who want to read and clear DTCs. | Autophix OM126 is for young average car owners or DIYers. |
Autophix OM121 Overview

The best part is that it is compatible with both foreign and domestic cars that are post-1996. Besides, Autophix OM121 is also compatible with the US, ASIAN, and EU built vehicles. At the same time, you can retrieve the I/M readiness test and read and clear ABS using this code reader. And the most outstanding feature about this code reader is that it reads pending and historic codes. It also defines the codes on the screen.
Detailed Review of Autophix OM121
For more information on Autophix OM121, read this review based on firsthand information.
Features And Functionality Of Autophix OM121
Read And Check Engine Light
If you want to quickly diagnose the cause of Check Engine Light, then Autophix OM121 is a preferred code reader. The code reader is designed to establish a quick connection with the vehicle’s on-board computer. As a result, the Diagnostic Trouble Codes (DTCS) are quickly displayed on the screen. Besides, you will be able to retrieve DTCs on foreign and domestic cars manufactured after 1996. Its compatibility extends to SUVs, light trucks, and hybrid vehicles.
This is because you will reduce the number of trips to your mechanic. At the same time, if you are a DIYer, you can fix the faults and clear the Check Engine Lights without incurring any cost. And when you are not able to fix the fault, you will not be overcharged by your mechanic. The reason is that you already know the cause of the Check Engine Light.
Read And Erase ABS Codes
Being able to retrieve the VIN of any vehicle accurately is an important procedure. This is because the VIN can help you track the history of a car.
Retrieving VIN is particularly important if you want to buy a used car. You can be able to tell the mileage as well as the exchange of ownership.
Check Emission Status
Autophix OM121 can help you establish the emission status of your car at a glance. This is because the code reader can retrieve the I/M readiness status of your car. You will be able to retrieve codes that indicate that your vehicle is in good condition. It means that your car is ready for a smog test. At the same time, you will be able to get codes indicating that there are minor unresolved issues. You can use the Autophix OM121 to perform a complete scan to check and clear the codes responsible for these unresolved issues.
On the other hand, you can retrieve codes indicating serious emission status. When you retrieve codes for serious emission status, your car will not pass the smog test. Therefore, it is recommended that you take your vehicle to a mechanic for a compressive check on the fuel system.
Defines The Diagnostic Trouble Codes
Autophix OM121 is capable of retrieving diagnostic codes and subsequently defines the codes. Definition of diagnostic trouble codes is an important feature for any average car owners and DIYers.
It implies that you will be able to determine what is causing Check Engine light accurately.
Compatibility
Autophix OM121 is compatible with both foreign and domestic vehicles manufactured from 1996. Besides, you will be able to scan Asian, EU, and US vehicles.
BONUS: Autophix OM123: Check Engine Fault OBD2/CAN Code Reader Review
For Whom Is It Built?
Autophix OM121 is primarily built for average car owners and DIYers. Its simplicity and ease of use allow car owners to read and retrieve codes. Besides, it has a screen that allows you to access the retrieved codes easily. As a result, you will be able to retrieve diagnostic codes really quickly.
Check Price at AmazonThe Bottom Line
Currently, there are numerous code readers in the market today. However, obtaining an accurate code reader that can retrieve accurate information may not be easy. Luckily, Autophix OM121 can retrieve codes accurately and quickly. Besides, it is compatible with a wide range of vehicles. It can read check engine lights in foreign and domestic cars. Autophix OM121 is a code reader that you can comfortably recommend to any average car owner.
I’m Tim Miller from Denver, Colorado. I’m the founder of obdadvisor.com, an automotive blog about "Auto Diagnostic Tools and Repair Guides". My fan page is facebook.com/autozikcom. I've been working as an automotive mechanic and blogger for over 10 years writing articles to share my experiences and expertise.
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