JETHAX OBDII scan tool review: Perfect choice for car owners

Our editors pick the products & services we write about. When you buy through our links, we may get a commission. Learn more.

The JETHAX OBD2 scanner is a diagnostic adapter (also called a dongle) for OBD2-compliant vehicles. If you’ve been trying to get one of these, you might want to look at this model more keenly.

Why do I say that? Because it packs some very handy diagnostic features that any car owner needs at some point. Plus, it’s straightforward to connect and use. All you’ll need is your phone (or tablet) and this tiny dongle, and you’ll be set to scan your car for potential problems.

JETHAX scan tool vs. Bluedriver vs. BAFX comparison table

Check Price
Check Price
Check Price
Customer Rating
PriceJETHAX priceOBDLink MX+ priceBAFX price
Package Dimensions4" x 2.5" x 1"2.2" x 1.9" x 1"2.8" x 1.5" x 1"
Item Weight1.6oz2.08oz2.88oz
OS platformWindows, iOS & AndroidiOS & AndroidWindows & Android
Vehicle compatibilityOBD2OBD2OBD2
Check Engine Light
Live data stream
Freeze frame data--
Emission test--
Here's where you can get an in-depth review of the JETHAX scan tool
If you’re looking for the an in-depth review of the JETHAX scan tool, this is the right place

JETHAX scan tool overview

This OBD2 dongle is perfect for car owners. It’s pretty basic in functionality; offering just what you need to diagnose the Check Engine Light and read live data.

Here’s a simple guide on how to do that:

  • Start by downloading the best OBD2 app for your vehicle and install it on your smartphone or tablet.
  • With the car key in the lock position, plug this diagnostic scanner into the car’s OBD2 port.
  • Now, start the car and then enable Bluetooth on your phone/tablet. You don’t need to match the devices at this point.
  • Open the app you downloaded, choose Bluetooth as the connection type, and when prompted to select a device to choose Viecar BLE. It may appear under a different name on Android devices, but it won’t be hard to identify. If you’re asked for a pairing code, use 1234. Chances are you won’t be asked for it.

That’s it. Now customize the OBD2 app you downloaded based on the features you need. The best way to do that is by adding dashboards for engine codes and live data streams.

Once that is done, the JETHAX OBD2 tool will tell you why the Check Engine Light (CEL) is on, thereby saving you a time-consuming and costly trip to the shop.

But how does it compare with other similar devices? Here’s a table pitting our feature product against the BlueDriver LSB2.

JETHAX OBDII scan tool: A valuable companion

So, what next after connecting this Bluetooth OBD2 adapter to your car? You start using it to run diagnostics. Here are the things to keep in mind:

1. Vehicle coverage

The first thing you want to know is whether this scanner is compatible with your vehicle. If the car is OBD2-compliant, i.e., a 1996 or newer model, it is covered by this dongle. It’s designed for cars and light trucks that use anywhere between 9V and 36V.

Which means it works on all cars and light trucks. Tiny as it is, this OBD dongle supports all OBD2 protocols, from SAE J1850 to ISO 14230-4 KWP and all through ISO1 5765-4CAN. Simply plug the scanner into the OBD2 port, and it will pull diagnostic data.

It has an LED light to help you find the OBD2 socket. That will come in handy, trust me! Most of these sockets are usually tucked in the dark parts of the driver’s compartment. Finding them is not a walk in the park.

2. OS compatibility

Next up, you will want to know whether it’s compatible with the devices you use. And that leads us to supported operating systems. The JETHAX OBD2 scanner supports iOS, Android, and Windows devices, which are basically all the operating systems used in smartphones and tablets.

It connects to devices via Bluetooth 4.0. One good thing about Bluetooth scanners is that they are portable and enhance your mobility. You can throw this tiny gadget in your pocket or small bag, alongside your phone, and go pretty much anywhere.

The tradeoff is that you’ll have to make do with a weaker connection. The signal between a Bluetooth OBD scanner and the ECU is generally more fragile than when you use a USB scanner. It’s stronger than Wi-Fi, though.

3. Functionality

The range of functions that you will get from the JETHAX OBD2 scanner depends on the diagnostic app you use. That may be a good or bad thing, depending on how you look at it. The bad part is that you need to browse through the tens, if not hundreds, of OBD2 apps to find the most suitable for you.

The good part is that this OBD dongle is compatible with virtually all diagnostic apps. So your options are pretty much unlimited. Some of the most popular iOS apps are OBD Fusion, OBD Car Doctor, BlueDriver, Auto Doctor, and Car Scanner ELM.

If you’re using an Android device, you can check out OBD Fusion, OBD Car Doctor, DashCommand, and Torque. Windows users also have a variety of options, including Auto Doctor and Car Scanner ELM.

At the very least, each of those apps will let you view engine codes and know why the Check Engine Light is on. From there, it boils down to the exact functions offered by the app.

For example, if you use the free version of Auto Doctor, you will be able to view engine codes, but you won’t be able to clear them. That function (resetting Check Engine Light) is limited to the premium version of Auto Doctor.

Luckily that’s not the case for all diagnostic apps. The free version of Torque allows you to view and reset fault codes. In exchange, you’ll have to cope with in-app ads, which is (in my opinion) a fair price to pay.

BlueDriver app offers a little more than the rest. With it, you can read and clear codes from all the major onboard systems, including engine, ABS, SRS, and transmission. The point is, make sure you pick an app that has all or most of the functions that you need.

4. Live data

Again, the amount of live sensor data you will get from the JETHAX OBD2 scanner depends on the OBD app you use. For example, if you use Car Scanner for iPhone, you’ll be able to view live streams for RPM, speedometer, voltage, fuel consumption, LAC, O2, etc. But you won’t be able to see engine temp or transmission temp.

It’s a similar story to all the diagnostic apps out there. Whichever one you choose, there are some live stream data that you’ll be able to see, and there are some that you won’t. It only emphasizes the importance of choosing the most suitable OBD2 diagnostic app for your car.

One good thing about this dongle is that it’s very small. With dimensions of 41.8 x 31.7 x 19.7 mm (1.6 x 1.2 x 0.8 inches) and a weight of 34g (1.2 ounces), it’s small enough to leave plugged in the car’s OBD2 port. That way, it will pull live data and send it to your phone instantly. The tiny thing only uses 15 amps of power, and there’s no chance of draining your car battery.

5. Software Update

Part of the JETHAX OBD2 tool package is that you get free software updates for the device’s lifetime. If the manufacturers add some new features, you’re guaranteed to get them as soon as they’re rolled out.

Who is the JETHAX OBDII scan tool for?

This OBD2 dongle is perfect for car owners. It’s pretty basic in functionality, offering just what you need to diagnose the Check Engine Light and read live data. Its simplicity (easy to use) adds to the scanner’s reputation as the go-to device for ordinary car owners.

Most DIYers and enthusiasts want scanners that also provide access to other onboard systems like ABS, airbag, transmission, and TPMS. Unfortunately, this one doesn’t. And, of course, it doesn’t support special functions like programming, actuation, and adaptation. If you’re a professional mechanic, you may find it quite underwhelming.


  • It uses Bluetooth 4.0 for a strong connection.
  • It’s very affordable.
  • It is compatible with iOS, Android, and Windows.
  • It covers all makes and models of OBD2 vehicles.
  • It’s easy to set up and use.
  • It can be used with any OBD2 diagnostic app.
  • The LED light makes it easy to plug the device into the OBD2 port.


  • The functionalities are limited. It’s only suitable for checking engine codes and viewing live data.
  • The functions depend on the OBD2 app you use.

Check Price at Amazon


Will the JETHAX OBD2 scanner work on my car?

It will work if the car is OBD2-compliant, i.e., a 1996 or newer model.

Can I use the JETHAX OBD2 tool to reset the Check Engine Light?

Yes, you can. But you must also have a diagnostic app that supports CEL reset.

Does this scanner check all codes?

Yes, it checks all engine-related codes. It, however, doesn’t diagnose other systems like ABS, SRS, and transmission.

Will the JETHAX OBD2 dongle drain my car battery?

Not at all. It uses a mere 15 amps. You can leave it plugged as you drive, and there won’t be any effect.

Which diagnostic app goes best with the JETHAX OBD2 adapter?

iOS users can consider OBD Fusion, OBD Car Doctor, BlueDriver, Auto Doctor, and Car Scanner ELM. Those using Android-based devices can install OBD Fusion, OBD Car Doctor, DashCommand, and Torque. And finally, Windows users have options that include Auto Doctor and Car Scanner ELM.

Can I get a live data stream of the transmission temp?

That entirely depends on the app you are using. Some OBD2 apps like Torque Pro, BlueDriver, and Auto Doctor do display live transmission temp readings.

Read More: JETHAX V311 Vs. JETHAX-001 Vs. Foxwell NT301: Honest Review And Comparison

Leave a Comment

Your email address will not be published. Required fields are marked *