Updated: December, 2025

Best Obd Ii Engine System Diagnostic Tools of 2025

Save up to 83% Off

1

TOPDON

9.7

Exceptional

TOPDON Car Diagnostic Tool ArtiDiag Pro with Online-Coding and Bi-Directional Control, Full Systems Diagnosis Obd2 Scanner with 35+Maintenance Services, 2-Year Free Update, Blue

Main highlights

SMART DIAGNOSTIC SCANNER: AutoVin functionality can automatically identify vehicle information to diagnose and repair vehicles faster. One-click to quickly detect and clear fault codes in all systems of the vehicle. This scan tool offers a feedback function. Customers can select the corresponding types of issues they are having and get professional assistance via phone or email at anytime.

BI-DIRECTIONAL SCAN TOOL: The ArtiDiag Pro car scanner provides exclusive access to vehicle-specific subsystems and component parts. This allows users to analyze and locate faulty parts accurately, including fuel injectors, coolant pumps, windows, wipers, and more.

35+ MAINTENANCE SERVICES: TOPDON ArtiDiag Pro car diagnostic tool meets all your needs with 35+ maintenance services, including Oil Reset, EPB Reset, SAS Reset, and BMS Reset. It supports popular vehicle makes like VW, GM, BMW, PORSCHE, MERCEDES-BENZ, and many more. Manage your repair jobs effectively without outsourcing.

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2

VDIAGTOOL

9.6

Exceptional

VDIAGTOOL VD30 Pro OBD2 Scanner, Car Diagnostic Tool for EOBD Cars, Fault Code Reader for OBD II Reset, OBD Scanner Live Data, Check Engine Light Error, I/M Readiness for All OBDII Protocol Vehicles

31% Off

Main highlights

Note: VDIAGTOOL VD30 Pro OBD2 code reader only suitables for check engine Light code reading and reset functions. NOT SUPPORTED Battery/ABS/Airbag/SRS/TPMS Codes and 24V DIESEL VEHICLES, Please check carefully before you buying.

Extensive Vehicle Compatibility - Vdiagtool VD30 Pro Car diagnostic tool supports all 16PIN vehicles compliant with OBDII protocols (KWP2000, ISO9141, J1850 VPW/PWM, CAN) across US (1996+), EU (2001+), and Asian cars, SUVs & light trucks, including newer CAN-equipped models, Check compatibility with your vehicle model before purchasing.

All-in-One Obd2 Scanner - Comprehensive OBD2 Functions,The VD30pro obd2 scanner diagnostic tool Can read/clear diagnostic codes, reset check engine lights (MIL), stream live sensor data, check I/M readiness, retrieve VIN, test O₂ sensors, freeze frame analysis, and access 98,563+ DTC library – plus battery voltage testing & report printing

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3

MOTOPOWER

9.5

Excellent

MOTOPOWER MP69033 Pro OBD2 Scanner Code Reader Check Engine Fault Light Diagnostic Scan Tool with Battery Tester

25% Off

Main highlights

Plug & Play for Every Driver - No Apps or WiFi needed. No additional battery or charger needed. Extended cable reaches tight spaces, while the intuitive menu works right out of the box. Perfect for DIYers and mechanics.

OBD Code Reader & Battery Tester - the 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. You can use it to check fault codes by yourself and display code definitions, understand the health of the vehicle, be fully prepared for going to the auto repair shop for car maintenance.

Advanced Battery & Alternator Test with Real-Time Monitoring - The OBD2 scanner also works as a battery tester to check the battery voltage and its starting performance. Accurately diagnose 12V battery health and alternator output. Live ripple analysis detects diode failures. (Test results may vary with temperature and vehicle age. Refer to manufacturer specs for pass/fail thresholds.)

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4

MOTOPOWER

9.4

Excellent

MOTOPOWER MP69033 Pro OBD2 Scanner Code Reader Check Engine Fault Light Diagnostic Scan Tool with Battery Tester

10% Off

Main highlights

Plug & Play for Every Driver - No Apps or WiFi needed. No additional battery or charger needed. Extended cable reaches tight spaces, while the intuitive menu works right out of the box. Perfect for DIYers and mechanics.

OBD Code Reader & Battery Tester - the 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. You can use it to check fault codes by yourself and display code definitions, understand the health of the vehicle, be fully prepared for going to the auto repair shop for car maintenance.

Advanced Battery & Alternator Test with Real-Time Monitoring - The OBD2 scanner also works as a battery tester to check the battery voltage and its starting performance. Accurately diagnose 12V battery health and alternator output. Live ripple analysis detects diode failures. (Test results may vary with temperature and vehicle age. Refer to manufacturer specs for pass/fail thresholds.)

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5

MOTOPOWER

9.3

Excellent

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

25% Off

Main highlights

Wide Vehicle Compatibility - The OBD2 professional automatic scanner supports all OBDII protocols such as KWP2000, J1850 VPW, ISO9141, J1850 PWM and CAN. Works with most 1996 and newer US cars, 2000 EU and Asian cars, light trucks, SUVs, and newer OBD2 and CAN vehicles both at home and abroad. Supports 6 languages - English,German, Dutch, Spanish, French, Italian. 【Refer to the Compatibility Guide to see if the scanner supports your car. 】

Plug & Play for Every Driver - No Apps or WiFi needed. No additional battery or charger needed. Extended cable reaches tight spaces, while the intuitive menu works right out of the box. Perfect for DIYers and mechanics. Designed with a clear LCD screen (128 x 64 pixels) - white backlight and contrast adjustment.

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.

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6

TOPDON

9.2

Excellent

TOPDON CarPal A, OBD2 Scanner, All System Diagnosis, Wireless Bluetooth Diagnostic Tool, Vehicle Health Check, Smog Check, Repair Guide, Engine Inspection, Vehicle Performance Test

20% Off

Main highlights

[Easy OBD2 Bluetooth Scanner, Complete Car Insights] Enjoy peace of mind with our comprehensive vehicle health check. From engine to steering, CarPal covers every crucial vehicle system and meticulously evaluates your car's health and enables read/clear codes with one tap. Understanding engine status has never been easier. CarPal indicates the severity of faults (severe or minor), and each code comes with tailored repair instructions to help you prioritize repairs and make informed decisions.

[Advanced Care, Save Time and Money] The Battery Test feature monitors real-time voltage and tracks battery performance to stay ahead of potential issues and maximize battery longevity. Our Smog Check allows you to perform a pre-test of the vehicle emissions, ensuring you pass your annual inspections. And for those who crave speed, the Performance Test measures your car's 0-60mph acceleration, giving you a clear picture of the vehicle’s capabilities.

[6 Essential Maintenance Functions] Take your vehicle maintenance to the next level with CarPal. This advanced diagnostic tool offers 6 of the most common reset services to keep your car running at its best. Start with features like Oil Reset and TPMS Reset to manage your vehicle's routine needs, and BMS Reset and EPB Reset for smoother driving. Throttle Adaptation and DPF Regeneration maintain optimal engine efficiency.

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7

Maxpow

9.1

Excellent

Maxpow OBD2 Scanner Diagnostic Tool - Wireless Bluetooth Car Fault Code Reader for iOS Android, Vehicle Health Check, Engine Inspection 1

83% Off

Main highlights

【OBD2 Scanner - Your Smart Car Health Guardian】Experience worry-free driving with our wireless diagnostic tool that puts lifetime free access at your fingertips. No subscriptions, no hidden fees - just one tap gives you complete vehicle system insights, instantly identifies issues, and keeps your car in peak condition. Whether you're preparing for MOT inspection or troubleshooting engine lights, delivers garage-level accuracy with DIY simplicity.

【Next-Gen Bluetooth 5.4 Performance】Engineered with the advanced 25K80 processor, our OBD2 bluetooth scanner outperforms standard models with 30% faster data transmission and 40% improved power efficiency. Monitor critical parameters in real-time - from engine RPM and coolant temp to oxygen sensor voltage - with top-grade connection stability. Works seamlessly across iOS, Android and Windows, making it your perfect companion for both emergency roadside checks and preventive maintenance.

【All-in-One Vehicle Health Dashboard】Turn your smartphone into a master control center with intuitive live-data displays. Clear graphs and gauges reveal your car's vital signs: transmission status, throttle response, battery health and more. Designed for all skill levels, our car diagnostic tool not only read/clear codes but provide prioritized repair recommendations, helping you make informed decisions about your vehicle's wellbeing.

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8

Wtuhu

8.9

Very Good

OBD2 Scanner, Enhanced Fixd Car Diagnostic Tool with Battery Tester, Fault Code Reader That Can Print Data to Cloud Reads & Clears Engine Error Codes for All OBD II Protocol Vehicles Since 1996

31% Off

Main highlights

Smart Upgrade: Unique cloud printing function allows you to instantly store, print and share detailed diagnostic reports, making vehicle health data management smarter. After scanning, the diagnostic report can be automatically uploaded to the cloud without worrying about data loss. Users can access these reports at any time to facilitate long-term tracking of vehicle health. The one-touch BAT button helps you instantly assess the battery health of the vehicle, providing real-time voltage readings, charging status and overall battery performance to avoid unexpected failures and always ensure vehicle safety.

Powerful Functions: This obd scanner diagnostic tool is loved by Internet celebrities, and it is full of features that can help you determine the cause of the Check Engine Light, quickly read and clear engine error codes, live data streaming (with graphical display), view freeze frame, mode six/mode eight check, O2 sensor test,check MIL readiness, read I/M monitor readiness and collect vehicle information, and display vehicle indicators in detail. Its reliable performance ensures accurate troubleshooting of various vehicle problems, making it a must-have tool for home DIY diagnostics or mechanics in the auto repair shop.

New UI Design & Newbie-Friendly: This code reader for cars and trucks is lightweight, portable, compact and fully ergonomic. Its bright and easy-to-read 10cm color screen provides vivid visuals and clear data display in any environment. With the newly designed UI interface and intuitive function navigation, basic functions such as engine diagnosis and battery testing can be quickly accessed. The red, green and yellow three-color light source design allows you to operate quickly and save time. At the same time, equipped with 9 intuitive buttons, you can easily and smoothly browse all the functions of the menu, even beginners can easily perform daily use or outdoor diagnosis.

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9

MOTOPOWER

8.6

Very Good

MOTOPOWER MP69033 Pro OBD2 Scanner Code Reader Check Engine Fault Light Diagnostic Scan Tool with Battery Tester, Red Edition

34% Off

Main highlights

Plug & Play for Every Driver - No Apps or WiFi needed. No additional battery or charger needed. Extended cable reaches tight spaces, while the intuitive menu works right out of the box. Perfect for DIYers and mechanics.

OBD Code Reader & Battery Tester - the 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. You can use it to check fault codes by yourself and display code definitions, understand the health of the vehicle, be fully prepared for going to the auto repair shop for car maintenance.

Advanced Battery & Alternator Test with Real-Time Monitoring - The OBD2 scanner also works as a battery tester to check the battery voltage and its starting performance. Accurately diagnose 12V battery health and alternator output. Live ripple analysis detects diode failures. (Test results may vary with temperature and vehicle age. Refer to manufacturer specs for pass/fail thresholds.)

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10

VPOW

8.5

Good

OBD2 Code Reader Diagnostic Scanner: OBD Car Scanner Tool Check Engine Light Fault Code Reader - Auto Car Diagnostic Tool for BMW Ford VW Audi All OBDII Vehicles with Live Data Battery Test

24% Off

Main highlights

Upgraded 2-in-1 OBD2 Scanner: VPOW Obd2 code reader has been fully upgraded, built-in 35901 DTC database, the old model ODB2 products usually only has 3,000-10,000 DTC. Added a professional battery check function, and is equipped with the latest industrial chip(scanning speed 6X faster than other vehicle code readers), Never worry about random charges at auto repair shops again – save time and money with this cutting-edge code scanner. It's the ultimate cost-effective diagnostic tools tester.

Multi-Functions: Professional OBD reader can automotive 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, DTC LOOKUP, O-2 Sensor Test, I/M monitor readiness, and collect vehicle information. Instead of taking the car to a mechanic shop, you can use it to check the trouble code and show the code definition by yourself.

Easy to Use- Plug & Play: The odb2 scan equipped with 2.8" color LCD display screen offers a super clear viewing of test results; the car diagnostic tool for all cars is equipped with a 3-foot-long cable and made of a very thick flexible insulator. There are 7 buttons on Car diagnostic scanner: scroll up/down, left/right, ok/back and buttons that I/M ready status. The code reader car diagnostic tool requiring no battery or charger as it is powered directly from the OBDII data link connector in the vehicle.

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