The Best Emissions Analyzers

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Discover now our comparison of the best Emissions Analyzers. 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 Emissions Analyzers 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 Emissions Analyzers 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.

SaleNo. 1

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)

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.
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.
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.
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.

SaleNo. 2

Autel Professional OBD2 Scanner AL319 Code Reader, Enhanced Check and Reset Engine Fault Code, Live Data, Freeze Frame, CAN Car Diagnostic Scan Tools for All OBDII Vehicles After 1996, 2025 Upgraded

【TURN OFF CEL】 This AL319 car diagnostic tool supports Reading DTCs, displaying Live Data, Freeze Frame & I/M Readiness etc to figure out the root cause of the Check Engine Light (CEL) and turning it off, to help you detect any potential problems, and to avoid excessive costs for unnecessary repairs.
【EXTENSIVE APPLICATION】 Autel AL319 Compatible with 7 languages (English, French, Spanish, etc.) and various post-1996 OBD II protocol vehicles (Toyota, Nissan, Honda, Ford, etc.), this OBD II scanner provides accurate and fast diagnosis for worldwide car owners.
【FOR END USER & DIYERS】 This error code reader AL319 is “plug and play” and comes with an easy interface. Even if you’re not familiar with vehicle repair, you can quickly take control of this obd2 scanner, and get the information you want.
【USER-FRIENDLY DESIGN】 This check engine code reader features a patented One-Click I/M Readiness, TFT color display, built-in speaker, LED Indicator etc. The cable is long enough without being too long and getting in the way. No batteries are needed.
【HIGH-QUALITY SERVICES】 12 months warranty from the date of purchase and lifetime free update are offered by this Automobile OBDII scan tool. Welcome to contact us via Q&A, email, or hotline, and our after-sale-service team for technical support.

No. 3

NEXPEAK OBD2 Scanner, NX501 Enhanced OBD II Auto Code Reader, Car Diagnostic Scan Tool Vehicle Check Engine Light Analyzer for All OBDII Vehicles After 1996 Colorful

【Professional Car Code Reader】 NEXPEAK NX501 obd2 scanner is an enhanced auto scanner that you can not only check all engine related fault codes, find out what caused the check engine light comes on, turn-off Malfunction Indicator Lamp (MIL), locate bad O2 sensor, but also can monitor car battery health status, remind you when the battery need to be replaced. It’s a perfect scan tool helps you to determine if your car need to be repaired and avoid blind maintenance, saves your time and money.
【Wide Array of Compatibility】 Accurately read and erase error codes on all OBD2 protocol vehicles with a 16 PIN interface (KWP2000, ISO9141, J1850 VPW, J1850 PWM and CAN). The NEXPEAK NX501 automobile diagnostic is compatible with most US vehicles that are model year 1996 or later – including sedans, SUVs, light trucks, and 12V diesels. This is a plug-and-play engine diagnostic code reader (both generic and manufacturer specific codes) – no extra batteries or apps required.
【Not Only Full OBD2 Function】 All 10 modes OBD2 diagnostic function including: read and erase fault codes, retrieve I/M readiness and freeze frame data. Unique graphical forms to display live sensor data, Auto VIN acquisition, O2 Sensor and EVAP Test (Mode 8), Advanced On-board Monitoring (Mode 6). This auto code reader can not only reveal what error codes your car is producing, but also monitor the battery voltage at all time during OBD car diagnostic, reminds you when having an aging battery.
【BEST Stability and Performance】This NX501 OBD2 car computer reader does all diagnosis via 2.8’’ color LCD screen, features with user-friendly UI design and STM-32 main chip, this diagnostic code scanner can access OBDII car diagnostics, DTC Lookup and Review 2-3 times faster than other car diagnostic scanners. With patented design soft silicone keypad and Red-Yellow-Green LEDs indicators, you don’t even need to read the manual and will enjoy the car diagnostics just as the professionals.
【Warranty & Update】 The NX501 OBD2 code scanner supports life-time free smart update service, Built-in memory card allows you to store diagnostic data and upload to computers for printing (for Windows ONLY). The NX501 package comes with a free carry case It’s a must have tool for you and your family.
【Great Gift for Father】 As the father's day comming, you can choose this wonderful obd2 scanner for your father or your husband as a superise present.

No. 4

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

🔥【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.
🔥【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.
🔥【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.
🔥【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.
🔥【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.
🔥【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.
🔥【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.

SaleNo. 5

Innova 5210 OBD2 Scanner & Engine Code Reader, Battery Tester, Live Data, Oil Reset, Car Diagnostic Tool for Most Vehicles, Bluetooth Compatible with America's Top Car Repair App

OBD2 SCANNER & BATTERY TESTER IN ONE – The INNOVA 5210 OBD2 scanner not only reads and clears check engine light and ABS codes (coverage may vary) but also functions as a car battery tester to check alternator health and prevent unexpected breakdowns.
LIVE DATA & REAL-TIME DIAGNOSTICS – Get instant access to OBD2 live data, including RPM, engine temperature, fuel trims, and oxygen sensor readings. The drive cycle readiness feature helps pass smog tests and emissions inspections with ease.
ENGINE CODE READER – This automotive diagnostic tool works with most US, Asian, and European vehicles from 1996 and newer, including Toyota, Ford, Honda, Chevrolet, Nissan, Dodge, and more. Read and erase ABS (coverage may vary) and engine trouble codes with pinpoint accuracy. Please use Innova's Coverage Checker to verify coverage.
OIL RESET & SMOG CHECK READINESS – The built-in oil light reset feature allows DIYers and mechanics to properly reset maintenance lights after an oil change. Check I/M readiness status to ensure your car is ready for an emissions test.
NO SUBSCRIPTIONS – VERIFIED FIXES WITH FREE APP – Unlike other OBD2 code readers, the INNOVA 5210 provides verified fixes based on real-world repairs from ASE-certified mechanics. Use the RepairSolutions2 app on iPhone & Android to get step-by-step repair guidance, suggested parts, and cost estimates—no extra fees or hidden subscriptions!

No. 6

⚛️ ACCURACY: NOx levels from emissions of motorcycle, forklift, automotive, small gas engines, combustion, reactions, and pollution emissions. The NOx analyzer comes with a USA NIST calibration certificate.
🔬 INCLUDED: Includes waterproof hard case, water trap, particle filter, and NOx filter to reduce cross-sensitivity errors, stainless steel probe with an alligator clip for exhaust pipe easy mounting, and high-temperature silicone tubing.
🔔 SENSORS: High-range electrochemical NO and NO2 sensors with a built-in micro-pump (0.5 LPM) with a response time of less than 30 seconds.
💪 STRONG: Robust design with ABS and anti-slip grip rubber. Comes with a back magnet for easy mounting on the vehicle panel to enable hands-free operation.
🕵️ TRUST: ** 1-year limited warranty ** Arrives with calibration and QA certificates ** Product tested and verified in the USA **

No. 7

⚙️ USES: For analyzing carbon monoxide levels from emissions of motorcycle, forklift, automotive, and small gas engines.
🚗 FEATURES: Includes waterproof hard case, water trap, particle filter, and NOx filter to reduce cross-sensitivity errors, stainless steel probe with an alligator clip for exhaust pipe easy mounting, and high-temperature silicone tubing.
💡 SENSORS: High-range electrochemical sensor (0.00 to 2.00 %vol CO) with a built-in micro-pump (0.5 LPM) with a response time of less than 30 seconds.
💪 STRONG: Robust design with ABS and anti-slip grip rubber. Comes with a back magnet for easy mounting on the vehicle panel to enable hands-free operation.
✅ TRUST: ** 1-year limited warranty ** Arrives with USA NIST calibration and QA certificates ** Product tested and verified in the USA **

No. 8

Autel AutoLink AL519 OBD2 Scanner Enhanced Mode 6 Car Diagnostic Tool Check Engine Code Reader CAN Scan Tool, Advanced Ver. of AL319

👍【Upgrade of AL319】Autel AL519 is a plug-and-play handheld OBD2 car check engine scanner. Upgraded from AL319, instead of just reading and clearing codes, AL519 can perform all OBDII functions (mode 1~10), and provide quick DTC lookup and live data in text & graph. It retrieves generic(P0, P2, P3, and U0), manufacturer specific(P1, P3, and U1) codes and pending codes, vehicle VIN, turn off CEL, check I/M readiness status for ready test, locate bad parts like a O2 sensor, do evap leak test, etc.
👍【Full OBD2 Functions】Generally only the scanners in auto parts stores are equipped with full OBD2 diagnosis, as they can handle more complex OBD2 issues. But this little guy has those too! AL519 car scanner integrates all OBD2 functions (10 modes), including: read code, clear code, view live data, freeze frame data, vehicle info, check I/M readiness status, O2 monitor test, on-board monitor test, EVAP leak test, modules present. Anyone who has cars knows it’s well worth the price!
👍【Read/Clear Codes & DTC Lookup】Knowing the accurate codes in advance if you don't want to be ripped off. You can use AL519 scanner to read the codes to quickly locate the problem areas, then determine if you can do the repair yourself or go to a mechanic, and clear the codes to get everything back to normal. When read out the DTCs, you can click the button to display what the codes mean, and DTC Lookup functions work as a DTC library to search meanings for DTCs, no need to google or guess it.
👍【Turn Off CEL & Smog Check】The Check Engine Light is always annoying you, most of the time because of a little thing like a loose gas cap, isn't it? With AL519 scan tool, you can read codes to quickly find out why the check engine light is on and reset it. Don’t waste money on a failed smog test! AL519 can retrieve I/M Readiness status to make sure OBD2 monitors on your car are “Ready”, monitors like misfire, fuel, catalyst, O2 sensors, EVAP, etc, to help you pass the annual smog check.
👍【Live Data Graphing】Data graphing makes everything easy, so you won't miss any suspicious data changes! Auto diagnostic scanner AL519 can view live data of multiple sensors and components in text and graph to quickly pinpoint bad parts or faults, for example, viewing the change of the 02 sensors in the graph mode enable you to locate bad sensors in a few minutes. Also you can use AL519 scanner to record the data for later review and print it out via PC to share it with customers or mechanics.
👍【Retrieve Freeze Frame Data & Vehicle Info】The more specific the information available, the clearer the problem. The OBD2 scanner AL519 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.
👍【User-Friendly Design, Easy to Use】Unlike AL319 with 3 keys, AL519 car scan tool has more keys to make it operate like an easy remote control, no worry to press the wrong key and cause “EXIT” issues. The user interface is really slick and easy to read on the color screen. Equipped with the patented I/M key, it takes you straight to the I/M readiness status page and tells you immediately if your car is “Ready” for a smog test.
👍【One-Year Warranty & Lifetime Free Update】Autel AL519 auto diagnostic scanner comes with lifetime FREE software updates and technical support. Autel AutoLink AL519 car scan tool is backed by 30 Days REPLACEMENT or FULL REFUND, 12 Months warranty from defects after-sales services. If there are any questions or concerns, pls don't hesitate contact us directly via 🚘auteldirect @ outlook. com🚘. 🚦📢👉NOTE: Autel AL519/ ML519 is the basic obd2 code reader, no need to and can't be registered.

SaleNo. 9

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

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.
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.
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.
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.
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.
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.

SaleNo. 10

AMTIFO OBD2 Scanner with Battery Tester - Check Engine Light & Emissions Readiness, Plug & Play, Battery Health, Real-Time Date, Car Code Reader, Support All OBD II Vehicles

Comprehensive Vehicle Diagnostics - Car code reader supports nine OBDII/EOOBD protocols, providing complete diagnostics for all car types. Easily read and clear check engine light codes for accurate troubleshooting
Battery Health & Voltage Monitoring - Code reader for cars and truck sexclusive battery tester checks battery life, charge, and voltage, keeping you informed of your car's battery status at all times
Real-Time Data Streaming - Car scanner access live data with clear graphs, enabling you to monitor vehicle performance in real-time and ensure emissions readiness for smog checks
User-Friendly & Multilingual - Simple plug-and-play setup with a responsive color screen. Supports 13 languages, making diagnostics accessible to users worldwide.
Durable & Compact Design - Built to last with a rugged exterior for easy handling. Portable and convenient, ideal for DIY diagnostics at home or professional use in shops.
Comprehensive Car Diagnostics with Real-Time Data - Instantly diagnose engine problems, read error codes, and monitor real-time vehicle data like RPM, speed, and fuel efficiency directly from your car's computer
Easy-to-Use Battery Tester for Fast Results - Quickly assess your vehicle’s battery health with the built-in tester. Prevent unexpected breakdowns and ensure reliable car performance by knowing your battery's condition
Improve Car Performance with Preventive Maintenance - Regular diagnostics help identify potential problems early, saving you from costly repairs. Keep your car in peak condition and prevent major issues before they arise
Perfect for DIY Mechanics and Professionals Alike - Whether you’re a DIY mechanic or a professional, this tool helps you quickly diagnose and repair common car issues, making repairs faster and more cost-effective
Wide Vehicle Compatibility for Versatile Use - Works with most vehicles (1996 and newer), including cars, SUVs, trucks, etc. This scanner is an all-in-one solution for your vehicle diagnostics, compatible with a wide range of makes and models

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Last update on 2025-07-06 / Affiliate links / Images from Amazon Product Advertising API

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