4 Best engine code readers in 2024

I bought a bunch of cheap scanners to see which one was the best. I tested them out and here are the 6 best engine code readers.

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vdiagtool vd30 pro
Best Overall
VdiagTool VD30 PRO

Comparing Vdiag to other code readers in a similar price range, it can display more live data values and also display up to 4 different graphic values at a time.
VD30 Review

Ancel ad310
Budget Pick
Ancel AD310

Ancel AD310 is one of the best-sellers on Amazon and I can see why. You will get full Global OBD functions, including some enhancements like engine live data graphs.
AD310 Review

Launch CR3008
Most data
Launch CR3008+

One of the best code readers I tried and the only downside was a slow reaction to pressing buttons when navigating in the scanner’s menu.
CR 3008+ Review

Ancel AD530 code reader
Best for beginners
Ancel AD530

Other than classic Code Reader functions, it gives the ability to read multiple live data graphs at once, do a battery health test, or even display a list of possible causes for every fault code.

Video: Ancel AD530

I also did a video with some of these code readers so you can see them in action.

How to use an engine code reader

Find the OBD-II Port:

  • Under the dashboard, driver’s side.

Connect the Code Reader:

  • Plug it into the OBD-II port.

Turn On the Ignition:

  • Key to “ON” position, engine off.

Read Codes:

  • Follow the reader’s prompts to get the diagnostic trouble codes (DTCs).

Look Up Codes:

  • Use the manual or online resources to understand the codes.

Fix or Reset:

  • Address the issue or clear the codes if fixed.

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