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The 10 Best Diagnostic & Test Tools to Buy – March 2021 edition

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Discover now our comparison of the best Diagnostic & Test Tools. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Diagnostic & Test Tools are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Diagnostic & Test Tools in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.

No. 1
Power Probe III w/Case & Acc - Red (PP319FTCRED) [Car Automotive Diagnostic Test Tool, Digital Volt Meter, AC/DC Current Resistance, Circuit Tester]
  • Supply Power or Ground for Functional Component Testing
  • Works on 12 - 24 Volt Range
  • Power Cable Length of 20 Feet
  • DC Voltmeter Indicators provide active feedback
  • Resettable 8 Amp Circuit Breaker; Continuity Tester; Component Tester
No. 2
ANCEL PB100 Automotive Circuit Tester Probe Kit Vehicle Diagnostic Test Tool Car Digital Volt Meter 12V 24V Electrical Power AVOmeter AC/DC Voltage Diode Current Resistance Detector
  • WIDE APPLICATION - ANCEL PB100 circuit tester is a fast and efficient electrical scanning probe, works on all 12-24V vehicle electrical systems, including cars, boats, trailers, fuel pumps, relays, and more.
  • A MUST-HAVE TOOL - Designed for voltage & polarity testing, continuity testing, signal circuit testing, supply power/activating components, trailer lights & connections testing. It features red/green polarity indicators, follows & locates short circuits, and checks bad Ground contacts.
  • 4 WORKING MODES - DC Voltage mode for reading the DC voltage with a resolution of 0.1 volts; AC Voltage mode for reading the Max. voltage, the Min. voltage, and frequency; Resistance mode for reading the resistance between the tip and auxiliary ground lead; Diode mode for checking forward bias or reverse bias.
  • SAFETY & DURABLE - An auto circuit breaker makes this tool very safe and sustainable and its short-circuit protection protects the device from overload. A quick self-test is a must before starting to test a circuit or component, which ensures your tool is in excellent condition.
  • FRIENDLY DESIGN - A friendly navigate user menu makes it easier to operate, even a beginner without a manual. Built-in 2 headlights allow you to work in the dark area; an extra 20 feet extension cord allows reaching wires in or out of the vehicle or some congested places; a rugged carry case to store the tool whenever.
SaleNo. 3
NEXAS NL101 OBD2 Scanner - Check Engine Light Car Code Reader Diagnostic Scan Tool Fault Code Scanner with Battery Test for OBDII Car After 1996 [Upgrade Version], including Black Protective Case
  • 🍀【A FREE PROTECTION CASE for U】: There is a main unit with OBD 16PIN diagnostic cable, user’s manual -- Instructions on Tool Operations, USB Cable -- Connect to a Computer for Upgrading Online and ►one FREE Protection Case for you. As usual, on the OBD market, you sholud pay for the Protection Case, but in our store, you can get it free.
  • 🍀【OBD/EOBD 2 Modules in 1】: Full 10 modes OBD2 diagnostic functions: read and erase fault codes, view I/M readiness, data stream, freeze frame data, retrieve auto vehicle information, O2 Sensor test to accurately locate bad O2 sensor, advanced onboard monitoring, and the EVAP test function which enable you initiate a leak test for the vehicle’s EVAP system.
  • 🍀【Realtime Live Data in Graph】: NEXAS NL101 car obd2 scanner helps you to check the car engine fault codes, displays the error code definition, finds out what caused and the result of the check engine light on, turn-off Malfunction Indicator Lamp (MIL), provides you the solution methods and reduce/avoid maintenance costs. Show real-time live data in graph to diagnose your vehicle. Save Time and Money.
  • 🍀【Rare Unique Battery Check】: The NL101 car code reader can read real-time battery voltage, monitor car battery health status, and give out 6 warning tips for your to maintain your battery. It offers such useful information for entry-level Pros and DIYer that they can quickly and efficiently troubleshoot OBD2/EOBD problems on vehicles, meantime also watches out the battery power situation.
  • 🍀【"?" Help & DTC Lookup & I/M】: NEXAS NL101 can help you explain the "?" on All Live Data, Freeze Frame and etc. when you don't know the meaning of the diagnosis. And you can go to the DTC Lookup to find the error codes when you don't know the meanings of them. You can one-click the I/M Monitor to perform emission readiness status, indicate whether various systems related to emissions on the vehicle are operating normally, and are ready for inspection and maintenance testing.
  • 🍀【Multi-Languages & Vehicles】: English, Spanish, French, Deutsch, Italian, Russian, Portuguese, Finnish etc. Works on all cars, mini vans and light duty vehicles (OBDII & CAN) from 1996 and latest – American cars released from 1996 years, European cars released from 2000 years and Asian cars released from 2006 years. 🚩Especially Japanese cars released from 2006 years.
  • 🍀【Long Press the "ESC" Key】: When you wanna exit the interface, LONG PRESS the "ESC" key, remember, LONG PRESS, not press once, or press twice in succession. 🚩Before using our product, you can use it directly without updating the software.
  • 🍀【Adjust the Screen Brightness】: It’s normal that the screen can’t be seen clearly because of reflection problems outdoors. The same happens when we use mobile phones outdoors. Just adjust the screen brightness of the OBD2 scanner to the maximum.
No. 4
EDIAG OBD2 Scanner YA-101 Car Code Reader for Check Engine Light,O2 Sensor and EVAP Test, On-Board Monitor Test Mode 6,Smog Check,OBD2 Diagnostic Scan Tool for OBD2 Protocol Vehicles Since 1996
  • 🚀【Vehicle Diagnoses Doctor】YA-101 is an upgraded version of basic obd2 scanners with feature complete support of all 10 modes of obd2; including reading and erasure of current codes, O2 Sensor Tests, On-Board Monitor Test (Mode 6), EVAP System Test (Mode 8), I/M Readiness, Vehicle Info, etc,.Help you pass the Smog check!
  • 🔎【View Live Data & DTCs Lookup】View Freeze Frame/Live Data streams, Live O2 monitoring, Misfire, Engine Coolant Temperature and Engine RPM Data; view real-time PID data from ECM; built-in DTC lookup library with definitions.
  • 🌎【All OBDII protocols Vehicles Coverage + 9 Languages】Works with most 12V gasoline vehicles sold in the USA since 1996. Supports all OBD2 Protocols: KWP2000, ISO9141, J1850 VPW, J1850 PWM and CAN. Support for 9 languages: Simplified Chinese, German, English, Spanish, French, Italian, Japanese, Traditional Chinese, Russian.
  • ✅【Garage Necessity】✅Plug and play function,easy to use.✅ Add Battery Test Function to view of Battery Status; ✅ color display; ✅ FREE LIFETIME software updates via USB port. It is recommended as a necessity in your garage/ Home and Autoshop.
  • 💥【Youtube Influencer Mechanic Recommend】ediag Tools provides Lifetime warranty for the YA-101 scan tool. Please feel free to contact, any time, via Q&A, Email and/or Amazon Messages.PLEASE NOTE:this tool only works on 12V cars,not NOT WORK FOR 24V truck.
No. 5
allsun Automotive Electrical Circuit Tester 2-24V DC Pen Type Vehicle Diagnostic Tool Auto Electrical System Diagnosis Test Device
  • EM287 Circuit Tester widely application: can be used to test continuity, test polarity of a voltage, check lamp, check electric motor, follow and locate short circuits, test for bad ground contacts and measure dc voltage from 2V to 24V etc.
  • Automotive power probe has long test lead. The cable length is about 5m(16ft) which allows you test any electrical system easily.
  • all sun power probe overload Protection: When the current exceeds 8A, the unit will disconnect the current automatically.
  • Auto probe tester, it's easy to use. Powered by the vehicle battery directly. The illumination function enables automotive technician to test the electrical system in the darkness.
  • Auto electrical tester, take the insufficient light environment in consider, the tool built in flashlight to indicate the DC voltage measurement.
No. 6
INNOVA 6030P Code Reader ABS/Check Engine Light OBD2 Scanner Live Data Diagnostic Scan Tool with Battery Test/Code Severity Levels/10 OBDII Modes
  • 🥇【CEL & ABS Fix for Family】Compared to other complicated scanners on the market, Innova 6030P obd2 scanner is designed for all US family at an affordable price to assist with the most common automotive warning lights issues, namely check engine light(CEL) and ABS(brake) light faults.
  • 🥇【Get Ride of Annoyance】During this difficult time, it can be annoyed when you found the warning lights on. With Code Severity Levels function of 6030P car scanner, you can quickly identify if your vehicle needs an immediate fix or if it can wait until you get home to fix it yourself.
  • 🥇【Do it Yourself】Not only can you read codes to diagnose your car problem directly, you can also see key information about your vehicle in real time (RPM, Oil Temp, etc.) to aid in diagnosis. Furthermore, to get your car fixed, just download Repair Solutions 2 for free and pair with your 6030P bluetooth code reader, you will have access to the most comprehensive automotive repair database with verified fixes.
  • 🥇【Battery Test to Save Time】Innova 6030P enhanced scan tool provides battery & alternator tests to check the performance of a vehicle's charging system. It does so by checking if the batteries and alternators are in line with voltage specs recommended for the vehicle. When troubleshooting a no start/hard start condition, carrying out this test really helps in knowing where to look, hence saving time.
  • 🥇【Developed & Supported in US】Innova 6030P car code reader is designed and developed in the US and supported by unmatched technical assistance from a staff of all ASE certified technicians. Supports English, Spanish or French. NOTE, few scan tool has all these features in this price range. It is also the perfect Gift for your family and friends.
  • 🥇【Please Note】Dear customer, if you are not pleased with your innova 6030P code reader and choose to return it, please kindly mark it unsellable to avoid an used one is resold again to other customers. Appreciate very much!
SaleNo. 7
NEXPOW Car OBD2 Scanner, V311 Automotive Engine Fault Code Reader, Car Diagnostic Scan Tool with Battery Test Tool for All OBD II Protocol Cars Since 1996
  • 🚗【New Upgrade OBD2 Scanner】The V311 OBD2 code reader is capable of performing multiple diagnostic functions like determining the cause of the Engine Light, Read/Erase Code, View Freeze Frame, I/M Readiness, Vehicle Information, Data Stream, BAT-Battery Detection, DTC lookup, RealTime Curve(Car Speed, Calculate Load Value, Engine Coolant Temp, Engine RPM), efficiently troubleshoot the Check Engine Light and the diagnostic trouble codes.
  • 🚗【Lightweight & Easy to Operate】 NEXPOW OBD2 plug and play, No battery or charger is required as it directly gets power from vehicle DLC. Fast scan and clear trouble codes, very easy to use, even a beginner can use this unit to read the error code, with what displayed on the screen. You can find out what the problem is and fix the easy ones yourself but don't worry about going to the 4S shop for too expensive repairs, saving money.
  • 🚗【One-Click DTC Lookup】V311 engine OBD2 reader built-in over 3000 code definitions DTC library, the OBD2 Scanner reads generic and manufacturer-specific trouble codes directly identify the code definitions on the screen, The enhanced fault code definition function helps you fully understand the meaning of the code. It saves you the trips to a mechanic, lets you decide whether it's something you can fix or need more help, save money and time.
  • 🚗【 BAT Function & LCD Display 】- Vehicle code reader designed with a clear display LCD screen (128 x 64 pixels) - white backlight and contrast adjustment. No need for any battery or charger, the OBD reader gets the power directly from your vehicle through the OBDII Data Link Connector. Besides, with the "BAT" button, a One-click battery check function allows you to detect car battery voltage.
  • 🚗【Strong Compatibility】Support 7 languages: Deutsch, Dutch, English, Italiano, Español, Français, Chinese. no matter where are you from, it always helps you. Our OBD2 scanner is compatible with all 1996 and newer model cars sold in the US, Europe, and Asia. Supports all OBD2 protocols: SAE J1850 PWM, SAE J1850 VPW, ISO 9141-2, ISO 14230-4 (KWP2000), and ISO 15765-4(CAN). Note: This car code reader is incompatible with new energy vehicles, hybrid vehicles.
No. 8
thinkcar THINKOBD 100 OBD2 Scanner, OBD2/ EOBD Car Code Reader with Full OBD2 Functions. Check Engine Code Reader Automotive Car Diagnostic Tool/Car Code Scanner for O2 Sensor/EVAP System/Smog Test
  • [ FULL OBD II/ EOBD DIAGNOSTICS]: This obd2 scanner possess full obd2 functions. Read Codes, Erase Codes, MIL Fault Indicator Light, Live Data, EVAP System Test, On-Board Mintor Test, View Freeze Frame, O2 Scensor Test, Vehicle Info, I/M Readiness, DTC Code Lookup, All OBDII Compliant Vehicles.
  • [ Cost-Effective ]: Featuring full OBD2 functions, easy operation, compact design, 1.77” TFT color screen etc. Thinkobd 100 car code reader with a budget friendly price, it’s the best solution for any DIYers to perform basic car maintenance. It works on most 1996 and newer US-based vehicles that are OBDII compliant (OBDII protocols: KWP2000, ISO9141, J1850 VPW, J1850 PWM and CAN).
  • [ Plug and Play ] : THINKOBD 100 obd2 scan tool read and clear fault codes for engine system. In addition, it’s get DTC Lookup function to look up DTC’s definition directly. This Thinkobd 100 "PLUG AND PLAY" scan tool, equipped with a long cable and made of a very thick flexible insulator, very easy to use for beginners.
  • [ I/M Readiness Status Test] : You can use this obd2 scanner to check the status of emission-related monitors misfire system and fuel system, make sure the monitor was set before taking it to smog, help you pass the Smog Check easily, save your money for paying fine tickets.
  • [12 Months Warranty & 7 Language] : This car code reader with 12-month warranty; Supports English, French, Spanish, German, Russian, Italian and Portuguese; For any problem, feel free to contact us directly.
No. 9
Mabor 12V Electronic Automotive Relay Tester, Car Battery Diagnostic Checker Tools with Clips Relay Tester Automotive Kit for Auto Repairing
  • DURABLE MATERIAL: The car auto battery checker made of plastic and metal material, solid and practical, fine workmanship and good performance, durable for a long time.Provides a convenient and intuitive diagnostic way, time-saving and economical.
  • FAST TEST TOOL: Settable to 4 and 5 pin relay - tests the 3 most popular automotive relays, through the continuous automobile battery (11V-15V) to the relay coil, the detector can properly check the relay contact function.
  • USE 12V POWER: The Car Battery Must Be a 12V Battery, and the Voltage of the Battery is Among 11V--15V. Ideal For Coil Resistance Above 20 Ohms.Test to properly control the opening and closing of the relay.
  • EASY TO USE: Small size and compact structure, which is easy to carry and use. You can test anywhere as you want.If the relay is abnormal the red LED will light, it's normal the green LED will light.
  • WIDE APPLICATION: The tester observes contact data, closure time, relay inertia at each test stage, etc. Quick and easy off the car relay test, provides a convenient and intuitive diagnostic way.This tester is designed to test the condition of your car relay.
SaleNo. 10
Insulation Wire Piercing Probes - Automotive Diagnostic Test Accessories Repair Tools Needle/Back Probe kit(Set of 4)
  • ►It is a maintenance tool for automotive diagnostic testing, and?it is?a back-test weather pack connector for many automotive sensors.
  • ► We have improved the cover of this product. it will not slide?during working. It has passed UL certification, and we are applying patent?for it.
  • ►Size: The length is 80mm, and it can be used?for wires below 4mm diameter.
  • ► Two use modes - no need to strip the wires and it won’t damage the wires. Remove the cover and it can test precision electronic components (as shown)
  • ►Storage Box - With a beautiful storage box, they can be easily placed in your toolkit?for better storage.

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Last update on 2021-03-02 at 16:23 / Affiliate links / Images from Amazon Product Advertising API