Obd Ii Engine System Diagnostic Tools Comparison - August 2025

Last Updated - August 16, 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

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

Model

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

Model

FOXWELL NT301 OBD2 Scanner Graphing Live Data Diagnostic Code Reader Professional Mechanic OBDII Scan Tool for Check Engine Light 2.8'' Color Screen OBD II Scanner for 1996 or Newer Vehicle

Model

UMEIJA OBD2 Scanner with Upgrade Battery Tester - Diagnostic Tool for Cars That Check Engine Light & Emissions Readiness Read and Clears Vehicle Error Codes for All OBD II Protocol Vehicles Since 1996

Brand

ANCEL

Brand

MOTOPOWER

Brand

Autel

Brand

FOXWELL

Brand

UMEIJA

Reviews

132,969 reviews

Reviews

109,677 reviews

Reviews

47,730 reviews

Reviews

78,975 reviews

Reviews

33 reviews

Features

Worth the money

9.6

Worth the money

9.4

Worth the money

9.6

Worth the money

9.3

Worth the money

8.9

Simple to use

9.8

Simple to use

9.6

Simple to use

9.8

Simple to use

9.3

Simple to use

8.9

Precision

9.6

Precision

9.4

Precision

9.6

Precision

9.3

Precision

8.9

Tech Specs

product dimensions

8.9L x 6.9W x 1.4H

product dimensions

6.02 x 2.75 x 0.91 inches

product dimensions

8.66 x 3.15 x 6.69 inches

product dimensions

7.87L x 5.51W x 1.69H

item weight

9.6 ounces

item weight

10.2 ounces

item weight

5.6 ounces

item weight

10.2 ounces

manufacturer part number

AD310

manufacturer part number

MP69033

manufacturer part number

NT301

manufacturer part number

OBD-V302

customer reviews

4.6 4.6 out of 5 stars 44, 323 ratings 4.6 out of 5 stars

customer reviews

4.6 4.6 out of 5 stars 36, 559 ratings 4.6 out of 5 stars

customer reviews

4.5 4.5 out of 5 stars 26, 325 ratings 4.5 out of 5 stars

customer reviews

5.0 5.0 out of 5 stars 11 ratings 5.0 out of 5 stars

model

AD310

model

MP69033

model

FOXWELL

model

OBD-V620

batteries

1 Lithium Ion batteries required.

batteries

1 Lithium Ion batteries required. included

batteries

1 Lithium Polymer batteries required.

batteries

special features

check engine

special features

DTC lookup library, Data Flow, Real-Time Graphic View, View Freeze Frame

special features

1. Check engine/live sensor test data, 5. OBDII monitors supported: Misfire Monitor, Fuel System Monitor, Comprehensive Components Monitor, Evaporative System Monitor, Secondary Air System Monitor, Air Conditioning Refrigerant Monitor, 2. One-click readiness key, 3. On-board monitoring test, 4. Display fault code definition automatically with HELP Button to get Possible Causes

special features

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

Simple to use with no batteries required.

Supports all OBDII protocols for broad compatibility.

Compact and lightweight, easy to transport.
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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9.7
2

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

Easy to use for beginners.

Supports multiple car models.

No battery needed; powers from car.
Main highlights

Wide Capability - Supports 9 protocols compatible with most 1996 US-Based, 2000 EU-Based and Asian cars, and newer OBD II & CAN domestic or import vehicles. Supports 6 languages - English,German, Dutch, Spanish, French, Italian.
Screen Protecting Film - There’s a transparent screen protecting film on the screen surface. If any scratches on the film, just tear off the screen protecting film. If any more problem on the screen, just contact our customer service for replacement directly.
Multi-Functions - Practical Multi-Functions OBD2 code reader features built-in OBD2 DTC lookup library, which help you to determine the cause of the engine light, read code, erase code, view freeze frame, I/M ready, vehicle information, data flow, real-time curve, get vehicle speed information, calculate load value, engine coolant temperature, get engine speed.
Connection Guide - Plug the scanner into the OBDII port on your car, turn on the ignition and then press the OK button to make the connection. To view the live data, please start the engine. If connection failure, please contact motopower directly for assistance.
Compact Design - Car diagnostic scanner is equipped with a 2.5 feet long cable and made of a very thick flexible insulator.There are 6 buttons on OBD2 Scanner:scroll up/down,enter/exit and buttons that quick query VIN vehicle number& the DTC fault code.
ABS / Airbag codes NOT Supported - It is able to read and clear check engine information which is part of OBDII system, but it cannot work with non-OBDII systems, including ABS / Airbag / Oil Service Light, etc.
2.8" LCD Display - Designed with a clear display 2.8" Large LCD screen - 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.
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9.5
3

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

Easy to use and compact.

Saves time diagnosing issues.

Affordable and reliable.
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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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 - August 2025

Our Score

To Amazon

Model

Brand

Reviews

Features

Worth the money

Simple to use

Precision

Tech Specs

product dimensions

item weight

manufacturer part number

customer reviews

model

batteries

special features

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

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

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

Our ranking system

Features

Consumer Reviews

Popularity

Value for money

Related deals you might like for obd ii engine system diagnostic tools

MOTOPOWER MP69041 OBD2 Code Reader Scanner Tool Oil Maintenance Reset, EPB Reset, Performance Test, Live Data, Pro-Level Design & Lifetime Updates (Professional Diagnostic Tool, Large)

Performance Tool W2977 CAN OBD II Scanner Tool for Check Engine Light & Diagnostics, Direct Scan and Read Out

FOXWELL Car Scanner NT604 Elite OBD2 Scanner ABS SRS Transmission, Check Engine Code Reader for Cars and Trucks, Diagnostic Scan Tool with SRS Airbag, Automotive Diagnostic Tool with Live Data

ANCEL AD410 PRO OBD2 Scanner and Battery Tester,2-in-1 Car Diagnostic Tool,Check Engine Light,EVAP Test,Live Data,6V/12V Battery Analyzer with Cranking & Charging System Test for Car Motorcycle

VDIAGTOOL VD10 OBD2 Scanner Code Reader Car Diagnostic Tool Engine Fault Code Reader for Turn Off CEL with Freeze Frame/I/M Readiness for All OBDII Protocol Cars, OBD2 Scanner Diagnostic Tool

Obd Ii Engine System Diagnostic Tools Comparison - August 2025

obd ii engine system diagnostic tools comparison

Our Score

To Amazon

Model

Brand

Reviews

Features

Worth the money

Simple to use

Precision

Tech Specs

product dimensions

item weight

manufacturer part number

customer reviews

model

batteries

special features

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

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

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

Our ranking system

Features

Consumer Reviews

Popularity

Value for money

Related deals you might like for obd ii engine system diagnostic tools

MOTOPOWER MP69041 OBD2 Code Reader Scanner Tool Oil Maintenance Reset, EPB Reset, Performance Test, Live Data, Pro-Level Design & Lifetime Updates (Professional Diagnostic Tool, Large)

Performance Tool W2977 CAN OBD II Scanner Tool for Check Engine Light & Diagnostics, Direct Scan and Read Out

FOXWELL Car Scanner NT604 Elite OBD2 Scanner ABS SRS Transmission, Check Engine Code Reader for Cars and Trucks, Diagnostic Scan Tool with SRS Airbag, Automotive Diagnostic Tool with Live Data

ANCEL AD410 PRO OBD2 Scanner and Battery Tester,2-in-1 Car Diagnostic Tool,Check Engine Light,EVAP Test,Live Data,6V/12V Battery Analyzer with Cranking & Charging System Test for Car Motorcycle

VDIAGTOOL VD10 OBD2 Scanner Code Reader Car Diagnostic Tool Engine Fault Code Reader for Turn Off CEL with Freeze Frame/I/M Readiness for All OBDII Protocol Cars, OBD2 Scanner Diagnostic Tool

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