Obd Ii Engine System Diagnostic Tools Comparison - April 2025

Last Updated - April 13, 2025

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Model

Ancel AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool, Read and Clear Error Codes for 1996 or Newer OBD2 Protocol Vehicle (Black)

Model

Autel OBD2 Scanner MS309 Universal Car Engine Fault Code Reader, Check Engine Light and Emission Monitor Status, OBDII CAN Diagnostic Scan Tool

Model

MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Scanner CAN Diagnostic Scan Tool for All OBD II Protocol Cars Since 1996, Yellow

Model

FOXWELL NT301 OBD2 Scanner Live Data Professional Mechanic OBDII Diagnostic Code Reader Tool for Check Engine Light

Model

FOXWELL NT301 Plus 2 in 1 OBD2 Scanner Battery Tester, OBDII Diagnostic Tool Check Engine Car Code Reader, 12V 100-1100CCA Cranking Charging System Alternator Test, Live Data, Full ODB2 Diagnosis

Model

FOXWELL Car Scanner NT604 Elite OBD2 Scanner ABS SRS Transmission, Check Engine Code Reader,Diagnostic Scan Tool with SRS Airbag Scanner, Car Diagnostic Scanner for All Cars with Battery Test

Brand

ANCEL

Brand

Autel

Brand

MOTOPOWER

Brand

FOXWELL

Brand

FOXWELL

Brand

FOXWELL

Reviews

100,275 reviews

Reviews

40,611 reviews

Reviews

41,706 reviews

Reviews

67,779 reviews

Reviews

2,055 reviews

Reviews

5,328 reviews

Features

Worth the money

9.6

Worth the money

9.6

Worth the money

9.4

Worth the money

9.3

Worth the money

9.3

Worth the money

9.1

Simple to use

9.8

Simple to use

9.8

Simple to use

9.6

Simple to use

9.3

Simple to use

9.4

Simple to use

9.1

Precision

9.6

Precision

9.6

Precision

9.4

Precision

9.3

Precision

9.6

Precision

9.1

User interface

9.6

User interface

9.6

User interface

9.4

User interface

9.1

User interface

9.3

User interface

9.6

Distance

9.3

Distance

9.6

Distance

9.4

Distance

9.1

Distance

8.6

Distance

8.1

Tech support

9.6

Tech support

9.6

Tech support

9.4

Tech support

9.1

Tech support

9.6

Tech support

9.1

Tech Specs

Manufacturer Part Number

AD310

Manufacturer Part Number

MaxiScan 2022

Manufacturer Part Number

NT301

Manufacturer Part Number

NT301 Plus

Manufacturer Part Number

NT604 ELITE

Special Features

Check engine

Special Features

Compatible with domestic, Asian and European vehicles, 1996 and newer, Views freeze frame data, Turns off Check Engine Light, clears codes and resets monitors, Displays DTC definitions on screen, Retrieves generic P0, P2, P3 and U0 , manufacturer specific P1, P3 and U1 , and pending codes, Displays monitor and I/M readiness status emissions , Erases Codes and turns off Check Engine Lights, Retrieves vehicle identification information VIN, CALID and CVN , Supports CAN Controller Area Network and all other current OBD II protocols

Special Features

5. OBDII monitors supported: Misfire Monitor, Fuel System Monitor, Comprehensive Components Monitor, Catalyst Monitor, Heated Catalyst Monitor, Evaporative System Monitor, Secondary Air System Monitor, Air Conditioning Refrigerant Monitor, Exhaust Gas Recirculation System Monitor, 6. Three multilingual package for options: 1 English, français, Español, Deutsche and italiano 2 English, Português, Magyar, Nederlands, svenska 3 English, , 1. Check engine/live test data, 2. One click readiness key, 3. On board monitoring test, 4. Display fault code definition automatically with HELP Button to get Possible Causes, 7. Supported OBD2 Protocols: J1859 41.6, J1850 10.4, ISO9141, KWP2000 ISO 14230 , CAN Control Area Network ISO 11898 .

Special Features

Check engine/live O2 sensor test data, Five multilingual package for options: English, français, Español, Deutsche and italiano, One click readiness key, On board monitoring test, Any compatibility/return/ product/unusual issues and so on, please feel free to contact OBDZON Team: amazonsupport foxwelltech.com, OBDII monitors supported: Misfire Monitor, Fuel System Monitor, Comprehensive Components Monitor, Catalyst Monitor, Heated Catalyst Monitor, Evaporative System Monitor, Secondary Air System Monitor, Air Conditioning Refrigerant Monitor, Oxygen Sensor Monitor, Oxygen Sensor Heater Monitor, Exhaust Gas Recirculation System Monitor, To be able to use update tool, PC or laptop must meet the following minimum requirements: A.Operation system: Win98/NT, Win ME, Win 2000, Win XP, VISTA and Windows 7 B.CPU: Intel P III or better C.RAM:63mb or better D.Hard Disk Space:30MB or better E.Display: 800 600 pixel, 16 byte true color display or better F. Internet Explorer 4.0 or newer

Special Features

60 car makes, including all mainstream car brands sold worldwide, abs scanner, transmission scanner, check engine code reader, Solid Protective Toolcase, srs code reader, For any questions, please feel free to contact us for fast support: amazonsupport foxwelltech.com

Item Weight

9.6 ounces

Item Weight

11.3 ounces

Item Weight

1.01 pounds

Item Weight

1.68 pounds

Item Weight

2.9 pounds

Model

AD310

Model

MS309

Model

FOXWELL

Model

NT301 Plus

Model

Screen Size

1 Inches

Screen Size

2.7 Inches

Screen Size

Lifetime Free Update, which only support for Windows system, not compatible with MAC or IOS system Free 16G Memory Reader Live Data Stream Built in DTC Lookup Check Engine Light Lifetime Free Update, which only support for Windows system, not compatible with

Screen Size

Solid Protective Toolbox only update on windows system mac and ios system not supported for update Special Functions Not supported like SAS, oil, EPB and etc Solid Protective Toolbox only update on windows system mac and ios system not supported for up

Power Source

Battery Powered

Power Source

Battery Powered

Power Source

Battery Powered

Power Source

Plug and Play OBD2 Scanner for ABS/SRS/Transmission/Check Engine

Product Dimensions

4 x 2.6 x 0.8 inches

Product Dimensions

8.66 x 3.15 x 6.69 inches

Product Dimensions

7.68 x 3.54 x 1.18 inches

Operating System

Other

Operating System

Item Dimensions LxWxH

4 x 2.6 x 0.8 inches

Item Dimensions LxWxH

6.02 x 2.75 x 0.91 inches

Item Dimensions LxWxH

7.68 x 3.54 x 1.18 inches

Review

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Review

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Our Top 3 Picks

Here are the top 3 recommended products with more information to help you find the right product for you

9.8
1

ANCEL
Ancel AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool, Read and Clear Error Codes for 1996 or Newer OBD2 Protocol Vehicle (Black)

9.8 Simple to use

9.6 worth the money

9.6 Precision

Why we love it

The product is easy to use, even for beginners

The product is affordable

The product is equipped with a large LCD display
Main highlights

Sturdy and Compact: Equipped with a 2.5 foot cable made of very thick, flexible insulation. It is important to have a sturdy scanner as it can easily fall to the ground when working in a car. The AD310 OBD2 scanner is a well-constructed mechanic tool with a sleek design. It weighs 12 ounces and measures 8.9 x 6.9 x 1.4 inches. Thanks to its compact design and light weight, transporting the device is not a problem. The buttons are clearly labelled and the screen is large and displays results clearly.
OBDII Protocols and Car Compatibility: Many cheap scan tools do not really support all OBD2 protocols. This is not the case with the AD310 scanner as it can support all OBDII protocols such as KWP2000, J1850 VPW, ISO9141, J1850 PWM and CAN. This device also has extensive vehicle compatibility with 1996 US-based, 2000 EU-based and Asian cars, light trucks, SUVs, as well as newer OBD2 and CAN vehicles both domestic and foreign. Check compatibility with your vehicle model before purchasing.
Home Necessity and Worthy to Own: This is an excellent code reader to travel or home with as it weighs less and it is compact in design. You can easily slide it in your backpack as you head to the garage, or put it on the dashboard, this will be a great fit for you. The AD310 is not only portable, but also accurate and fast in performance. Moreover, it covers various car brands and is suitable for people who just need a code reader to check their car.
CEL Doctor: The ANCEL AD310 is one of the best-selling OBD II scanners on the market and is recommended by Scotty Kilmer, a YouTuber and auto mechanic. It can easily determine the cause of the check engine light coming on, quickly read and clear diagnostic trouble codes, read live data & hard memory data, view freeze frame, I/M monitor readiness and collect vehicle information. Instead of taking car to mechanic shop, you can use it to check the trouble code and show code definition by yourself.
Accurate Fast and Easy to Use: The AD310 scanner can help you or your mechanic understand if your car is in good condition, provides exceptionally accurate and fast results, reads and clears engine trouble codes in seconds. If you want to find out the cause of the check engine light, this device will let you know immediately and fix the problem right away without any car knowledge. No need for batteries or a charger, get power directly from the OBDII Data Link Connector in your vehicle.
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9.6
2

Autel
Autel OBD2 Scanner MS309 Universal Car Engine Fault Code Reader, Check Engine Light and Emission Monitor Status, OBDII CAN Diagnostic Scan Tool

9.8 Simple to use

9.6 worth the money

9.6 Precision

Why we love it

The MS309 obd2 scanner can save you money on emissions

related repairs.

The MS309 can read and clear codes, view DTC definitions, and turn off the check engine light.
Main highlights

【Works on 99% Vehicles】Autel MaxiScan MS309 compact pocket code reader supports all OBD2 protocols: KWP2000, ISO2000, ISO9141, J1850 VPW, J1850 PWM and CAN. This OBD2 code scanner is compatible with 99% OBDII-Compliant vehicles, passenger cars or light trucks. For OBD2 cars, usually, post 1996 for US market, post 2006 for EU market and post 2009 for Asian market.
【Turn Off Check Engine Light】When your car detects an emission related problem, Check Engine Light will be turned on. Do you want to spend hundreds of dollars to turn off this light every time, maybe it's just a gas cap that's not tightened or needs to change bad parts like spark plugs and ignition coils? With Autel MS309 scan tool, you can read code to quickly find out why the check engine light is on and reset it.
【Retrieve Freeze Frame Data &Vehicle info】The more specific the information available, the clearer the problem. The OBD2 scanner MS309 can retrieve freeze frame data, including important engine parameters like RPM, fuel pressure, fuel trim, engine coolant temperature, etc. Also it can retrieve Vehicle Information such as VIN number, Calibration ID(s), Calibration Verification Nos. (CVNs), etc, which is useful to check whether the ECU matches when you are buying a used car.
【Ready For Annual Smog Check】If the OBD II Readiness Monitors on your car are not “Ready”, your car may fail the smog check. MS309 OBD2 scanner can retrieve I/M Readiness status to check the monitors like misfire monitor, fuel system monitor, comprehensive components monitor, catalyst monitor, O2 sensors, EVAP, etc, to help your car ready pass the annual smog check. That way you won't waste time and money on a failed smoke check.
【Read Codes & Clear Codes】Knowing the codes in advance will brace you for the repair cost estimate so that you won't be fooled and get overcharged by the repair shop.This Autel MaxiScan MS309 obd2 scanner scans OBD2-compliant vehicle Diagnostic Trouble Codes (DTCs) in seconds to pinpoint emission-related issues. The little guy can do many basic but necessary works: read/clear codes, view DTC definition, turn off check engine light, check I/M Readiness status, retrieve freeze frame data and vehicle info.
【On-Screen DTC Definition, Save Time & Easy To Use】Autel MS309 OBD2 code reader with UPGRADED CHIP to retrive and clear generic(P0, P2, P3 and U0), manufacturer-specific(P1, P3 and U1) and pending codes, and display DTCs(Diagnostic Trouble Codes) meanings under the codes based on the built-in database(more than 3000 codes). Don't need to spend much time to search meanings on the internet. This advanced plug-and-play MS309 scanner saves you time - a must-have obd2 scanner for each car owner.
【No-Worry Purchase】Automotive OBDII scan tool MS309 comes with a 12-month warranty and free lifetime technical support. If you need any technical support, please feel free to contact us at autelofficial @ outlook . com. NOTE: It does not support the full engine system, if need, pls consider ML629/ MK808BT, etc.
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9.5
3

MOTOPOWER
MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Scanner CAN Diagnostic Scan Tool for All OBD II Protocol Cars Since 1996, Yellow

9.6 Simple to use

9.4 worth the money

9.4 Precision

Why we love it

The OBD2 code reader can help you determine the cause of the engine light, read codes, erase codes, view freeze frame, and more.

The OBD2 code reader is compatible with most 1996 US Based, 2000 EU Based and Asian cars, and newer OBD II CAN domestic or import vehicles.

The OBD2 code reader is designed with a clear display LCD screen and easy to use buttons.
Main highlights

Multi-Functions - It's a practical multi-function OBD2 code reader which helps you determine the cause of the check engine light coming on, quickly read and remove diagnostic trouble codes, read live data & hard memory data, view freeze frame, I/M monitor readiness and collect vehicle information. Instead of taking car to mechanic shop, you can use it to check the trouble code and show code definition by yourself. Wide Compatibility - Supports 9 protocols compatible with most 1996 US-Based, 2000 EU-Based and Asian cars, light trucks, SUVs, as well as newer OBD2 and CAN vehicles both domestic and foreign. Check compatibility with your vehicle model before purchasing. It can also be used for some motorcycle OBD2 system diagnosis. (Note: an additional specific adapter cable is needed. not included with this device) 2.8" LCD Display & Multi-language - Designed with a clear 2.8" LCD screen (128 x 64 pixels) - white backlight and contrast adjustment. No need any battery or charger, OBD reader gets the power directly from your vehicle through the OBDII Data Link Connector. It also supports 6 languages - English,German, Dutch, Spanish, French and Italian. This scanner is enjoyed and highly recommended by the customers worldwide. Compact Design & Easy to Use - It weighs about 12 ounces and measures 6 x 2.75 x 0.9 inches. Equiped with a 2.5 feet long heavy duty cable and the standard 16-PIN OBD connector. 6 buttons for quick operation. The plug and play design makes it user-friendly. Even if you don't have much technical knowledge, you can operate it without any hassle. "Accurate & Fast - Different with other similar scanners, the MP69033 scanner use the brand new ARM micro processor to make sure the ultra high accuracy and fast speed. With the excellent performance of the micro processor, the detailed real-time engine data can be detected and displayed on the screen in seconds. Get codes, fix the problem and turn off the CEL. If you just need a code reader to check your car, it's definitely an affordable and reliable tool.
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Our ranking system

At BestChoice.com, our team curates a selection of top products from a vast array available online, using a sophisticated ranking system based on carefully defined criteria.
While traditional hands-on testing has its merits, our use of AI technology offers distinct advantages. AI allows us to process and analyze vast amounts of data from multiple sources, providing a comprehensive view that goes beyond what manual testing can achieve. This approach enables us to deliver insights that are aligned with current trends and consumer preferences, ensuring our reviews are both relevant and up-to-date.

Features

Our AI-driven analysis examines key attributes, capabilities, and other critical factors tailored to each product category. This method allows us to assess effectiveness from various perspectives, ensuring a well-rounded evaluation.

Consumer Reviews

We aggregate and evaluate consumer feedback from across the internet, giving weight to ratings and reviews that reflect the most reliable insights. AI enhances this process by filtering and prioritizing data, offering a balanced view without the need for direct personal endorsements.

Popularity

Our system also considers the popularity of products, analyzing factors such as market presence, reputation, and user satisfaction. By leveraging AI, we capture a comprehensive picture of a product's standing in the market, which may not always be evident through traditional testing.

Value for money

AI allows us to compare products based on attributes like price, specifications, and user feedback, helping to determine their value for money. This data-driven approach offers an efficient and reliable way to assess how products stack up against one another in terms of cost-effectiveness.

Obd Ii Engine System Diagnostic Tools Comparison - April 2025

obd ii engine system diagnostic tools comparison

Our Score

To Amazon

Model

Brand

Reviews

Features

Worth the money

Simple to use

Precision

User interface

Distance

Tech support

Tech Specs

Manufacturer Part Number

Special Features

Item Weight

Model

Screen Size

Power Source

Product Dimensions

Operating System

Item Dimensions LxWxH

Review

Available On

Our Top 3 Picks

Ancel AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool, Read and Clear Error Codes for 1996 or Newer OBD2 Protocol Vehicle (Black)

Why we love it

Autel OBD2 Scanner MS309 Universal Car Engine Fault Code Reader, Check Engine Light and Emission Monitor Status, OBDII CAN Diagnostic Scan Tool

Why we love it

MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Scanner CAN Diagnostic Scan Tool for All OBD II Protocol Cars Since 1996, Yellow

Why we love it

Our ranking system

Features

Consumer Reviews

Popularity

Value for money

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