Top 10 Picks Best Engine Code Scanner Of 2023, Tested & Reviewed

Features :

• 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 device 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.

Features :

• 【Auto OBDII Scanner Diagnostic Tool】This plug-and-play car code reader and clears codes with ease. It retrieves generic code and displays DTC definitions to quickly identify engine related fault code, easily find out what caused.
• 【Broad Compatibility】OBD2 scanner diagnostic tool is compatible with all OBD II and CAN Compliant vehicles, including passenger cars and light trucks dating back to post-1996 in the US, post-2000 for EU-based and Asian cars. Please note that it is not suitable for new energy or hybrid vehicles.Supports multilingual – including English,German, Dutch, Spanish, French, Italian etc.
• [I/M Ready Function] Car diagnostic scanner is used to check whether the status of the I/M function is ready.
• 【Freeze Frame Date For Accurate Fault Diagnosis】OBD2 scanner features a viewing freeze frame function, which retrieves data recorded in the ECU of the condition under which the fault occurs. This feature quickly determines why the check engine light is on, reducing test drive verification time.
• 【Retrieval of Vehicle Info】Vehicle code reader can retrieve the Vehicle Identification No. (VIN), Calibration ID(s), Calibration Verification Nos. (CVNs), and more, ensuring that the ECU matches your car.
• 【Maintain Your Engine In Good Shape】When the MIL illuminates with a steady light, simply plug the code reader into your car’s 16pin OBD II port, press the button according to your need, and you’ll see the error code and its definition instantly. Use the code reader to erase engine fault codes and keep your engine in good shape.
• 【Product Warranty】Professional auto scan tools come with a 3-year warranty and lifetime technical support. If you encounter any issues using this product, please contact us for assistance to resolve it promptly.

Features :

• 【New Advantages】: The OBD2 scanner can fully diagnose the car’s data. It can 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. Six popular languages are supported: English, German, Dutch, Spanish, French, and Italian.
• 【Save Money & Time】: The automotive diagnostic scanner can quickly diagnose your car at any time, reading and erasing fault codes that may be causing vehicle emission problems in seconds. It helps you detect potential problems and avoid unnecessary excessive repair costs. We recommend that when you find a fault code, please fix the problem before erasing the code.
• 【Convenient & Portable】: OBD2 diagnostic tool is very easy to use, you just need to plug it into your car’s OBD port and turn on the ignition, you will be able to find the problem about your car’s engine system and possibly fix it. The compact size of 6.10 x 3.34 inches is easy to grip with one hand, and you can put it in any toolbox or pocket, and it doesn’t take up too much space.
• 【Compatibility】: The car code reader is compatible with 99% of OBDII vehicles. For OBD2 cars, usually, post 1996 for US market, post 2006 for EU market and post 2009 for Asian market. It has a 16pin OBDII standard interface. It requires no additional apps and allows even novices to quickly find and fix car troubles.
• 【Instructions】: There are 6 buttons on OBD2 Scanner: scroll up/down, enter/exit and buttons that quick query VIN vehicle number& the DTC fault code. If you have any product problems or installation problems, please feel free to contact us, we promise to always provide satisfactory solutions and serve you.

Features :

• DIY OBD2 Diagnostic Scanner: LAUNCH Creader 301 is an entry-level and cost-effective DIY diagnostic tool, it will be a good assistant for a beginner. This OBD2 scanner comes with a 1.77″ TFT color display, which has good visual effects, you can see the test results and data clearly. Just plug and play, no need to charge, very easy to use.
• Full OBD2 Functions: Creader 301 OBD2 scanner supports full OBD2 Functions: quickly read/erase codes, view live data/freeze frame, retrieve I/M readiness monitor status, check O2 sensor, do On-board monitor test/EVAP test, read vehicle information, built-in DTC lookup library. It works with most 1996 and newer American, European, Asian vehicles, which supports OBD2/EOBD.
• Lifetime Free Update: You can go to our LAUNCH official website to download and install the update tool, then connect the scan tool to a PC via the USB cable, and choose the latest version to update. Then the data will be accurate and its using life can be extended.
• Wide Vehicle Coverage: The OBD2 scanner supports all OBDII protocols: KWP2000, ISO9141, J1850 VPW, J1850 PWM and CAN (Controller Area Network), it can work with most vehicles after 1996 & newer OBD2 in American, European, Asian.
• Worry-free After-sale Service: LAUNCH Tech USA as a leading supplier of diagnostic tools and solutions, our mission is to provide the most innovative diagnostic tools, cost-effective solutions and best service to our local customers. If you have any questions in use, welcome to contact us freely, we are always here to serve for you! And we will offer 12 months warranty and lifetime technical support & service for our diagnostic tools!

Features :

• ✐ Multi-Functions: Practical Multi-Functions obd2 scanner diagnostic tool features built-in OBD2 DTC lookup library, which help you to determine the cause of the engine light, read code, erase code, fault code information query,view freeze frame, I/M ready,reading data stream and playback function, real-time curve, reading vehicle information, get vehicle speed information, calculate load value, engine coolant temperature, get engine speed,Support car battery voltage test, EVAP/O2 sensor test.
• ✐ Car Diagnostic Scanner for Most Cars: 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 8 languages – English,German, Dutch, Spanish, French, Italian,Russian and Chinese.
• ✐ 2.8 Inch IPS color screen: Break the conventional car OBD2 code reader concept and redefined it, Adopting a 2.8-inch IPS color obd2 gauge display, it has a stylish appearance and a comfortable hand held experience. Don’t need any battery or charger, OBD reader gets the power directly from your vehicle through the OBDII Data Link Connector.
• ✐ Perfect Design: Car diagnostic scanner is equipped with a 2.5 feet long cable and made of a very thick flexible insulator.There are 4 buttons on AMTIFO W4 OBD2 Scanner: scroll up/down,confirm/exit button and three warning lights.(Green light: support the vehicle detection ;Yellow light: It is read that the vehicle is faulty ; Red light: The product is energized normally)
• ✐ Warranty & Service: TWO YEAR WARRANTY AND 100% SATISFACTION SERVICE. Thank you for choosing AMTIFO! But if you are not pleased with the product, please contact AMTIFO Team directly for hassle-free return and refund. Save your bucks and time.

Features :

• Multi-Functions OBD2 code reader: OBD Scanner has the professional-grade OBD functions you need to help fix the cause of your engine light. It can pinpoint the cause of warning lights, provide accurate and fast results, it’s your time and money saver. Car diagnostic scanner functions include: Read and Clear DTC, view Freeze frame, read I/M readiness, retrieve Vehicle info, Live data, Data stream, built-in 35,901 DTC library, Voltage test, RT curve, 02 sensor test, EVAP.
• Wide Compatibility: The OBD2 code reader is truly compatible with over 98% of vehicles. Car OBD2 Scanner Code Reader supports up to 9 protocols and is compatible with most cars after 1996 (USA), 1998 (Canada), 2002 (EU), and 2008 (Asia). Notes: CAN Diagnostic Scan Tool not compatible with new energy vehicles, hybrid vehicles, diesel engines, and vehicles that do not comply with the OBD2 protocol. Please refer to your vehicle model before purchasing.
• 35,901 DTC Data Lookup: Unlike traditional mode car diagnostic scanners, this innovative Engine Fault Code Reader Scanner for All OBDii Protocol Cars Since 1996 has a database of up to 35,901 DTCs, which can quickly help diagnose and resolve your vehicle’s issues, saving you time and surpassing the functionality of most conventional OBD databases on the market. Plug and play OBD2 Scanner tester, no need for batteries or chargers, environmentally friendly and convenient.
• User-Friendly Design: The 2.8-inch color OBD2 gauge display (240 x 320 pixels) is clear and visible in various lighting conditions, enhancing your user experience. The 90cm cable is made of flexible insulated material for a comfortable feel and increased safety. It weighs 210g and measures 7.0 x 3.4 x 0.9 inches. OBD2 scanner Supports 8 languages: English, German, Chinese, Spanish, French, Italian, Russian, Dutch.
• Not Compatible with ABS-Airbag Codes: This full ODB2 error code reader is specifically designed to diagnose and clear engine-related faults and is not suitable for non-OBDII fault inquiries, such as ABS-airbag-SRS codes, etc. The device features three intelligent indicator lights for a more intuitive experience, making it suitable for beginners, vehicle owners, home mechanics, car enthusiasts, as well as service and maintenance technicians.

Features :

• ✔Full OBDII Modes Scanner for Car: As professional car scanner, ZM201 has all the OBD2 functions you need.🔎Read & clear codes, 💡turn off engine light or MIL, ❄view freeze frame, 📋read I/M readiness, 🚕retrieve vehicle VIN, 🔋battery voltage test, 📈live data stream (with graphing display), ✅built-in 35901 DTCs, O2 sensor test, onboard monitoring mode, and perform component testing etc.
• ✔Enhanced OBD2 Scanner Diagnostic Tool: Live data and DTC replay combined with printing function, you can connect it to a computer for fault data printing, prevent auto repair shops from charging randomly, save money and time. ZM201 obd scanner also comes with free-lifetime software updates, ensuring you always have the latest features and improvements.
• ✔35,901 DTC Lookup: ZM201 car code reader built-in 35,901 DTCs, the old model obd2 usually only have 3,000-10,000. So the ZM201 car scanner has a huge advantage, which means that this obd2 scanner can better help diagnose and solve your vehicle faults. This is a great option if you want to replace or upgrade an existing car scanner.
• ✔Compatible with 98% Vehicles: ZM201 OBD2 scanner for car is compatible with most cars after 1996(USA)/2002(EU)/2008(Asia). If your car has an OBD2 port (16Pin), and the production time meets the above timeline, then your vehicle is compatible. But it is not compatible with new energy vehicles, hybrid vehicles, and models that do not comply with the OBD2 protocol.
• ✔Convenient Shortcut Functions: The addition of shortcut keys enhances the user experience. Pressing F1 enables you to quickly retrieve trouble codes, while F2 provides instant access to I/M readiness information. We’ve also introduced left and right navigation buttons (the previous model had only up and down buttons), making operation even more convenient.
• ✔User-Friendly Design: The scanner boasts a 2.8-inch color screen that allows you to choose between dark and light modes and adjust the brightness according to your preference. Audible beep notifications (which can be disabled) accompany key presses, providing an intuitive user experience. The vehicle status indicator light turns red when a fault is detected, yellow when there’s an incompatibility/connection failure, and green when the car is successfully connected.
• ✔Customer-Oriented Services: Each package includes canvas storage bag for your storage, and Type-C cable to connect to your computer. And we offer 60-day return policy and 3-year replacement service, ensuring your satisfaction and peace of mind. If you have used this product and returned it, please mark it as unsellable so that the used product will not be resold to other customers, it is much appreciated.

Features :

• 🎉AUTOPHIX 126 is compatible with Toyota, Ford, Chevrolet, Honda, Nissan, Jeep, Hyundai, Kia, Ram, Subaru, and so on.
• 🚘➤【POWERFUL FEATURES】Built-in 14 special functions in 1 car reader, read and erase stored e-mission related codes, pending codes, and show code definitions, data steam, freeze frame, on-board monitoring, and show the vehicle information, I/M reading, review the recorded DTC, review & print report. Support EVAP system test, let you initiate a leak test for the vehicle’s EVAP system, identify troubleshooting related to fuel efficiency and vehicle e-missions.
• 🚖➤【PROFESSIONAL CHECKING CAR ENGINE TOOL】The OM126P Enhanced OBDII scanner can read and erase the trouble codes that can cause e-mission problems in your vehicle in seconds, determine check engine light the MIL (check your car engine) and reset the monitor, build a DTC lookup library you can find the related code definitions to help you determine if your car needs repair, to save you time and money, and dramatically improve your car lifespan/performance.
• 🚔➤【PROVIDE COMPREHENSIVE DATA FOR YOU】The OM126P can comprehensively diagnose data from your car, displaying graphical data streams: calculated load values, engine coolant temperature, intake manifold absolute pressure, vehicle speed, intake air temperature, air flow sensor, engine sp,eed etc, OM126P also supports data comparison, allowing you to easily diagnose vehicle conditions and know every parameter of the freeze frame: DTCFRZF, FUELSYSA, ETC, SHRTFT1, LONGFT1, MAP, RPM, VSS, IAT….etc
• 🚙➤【HD COLOR SCREEN AND EFFICIENT HOT-KEYS】The OM126P car diagnostic tool is equipped with 2.4″ TFT 262K true color LCD display screen to indicate the test results, with the silicone keypad you can easy to access each menu option, the I/M Readiness hotkey can check the state e-missions readiness and drive cycle verification, Also, a wealth of car information is retrieved to find out all about your car without hassle for recording, car tracking, buying matched parts, etc.
• 🚕➤【STRONG COMPATIBILITY AND MULTIPLE LANGUAGES】 Work on all after 1996 and newer vehicle models in the USA(OBD II&CAN) or other imported vehicles. Quickly read and erase the DTC on all OBD II protocols vehicles: CAN, J1850 PWM, J1850 VPW, ISO9141 and KWP2000 and support for 10 languages: English, French, Spanish, German, Russian, Italian, Finnish, Portuguese, Polish, Dutch, which make it easy to use for people from different countries.
• 🚗➤【COMFORT ERGONOMIC DESIGN】Unique black shell grip gives a firm and secure user experience. The compact appearance design makes it easy to keep in your rig or in a toolbox drawer. Hard rubberized feel skin lets this scanning tool more textured. All these features have AUTOPHIX OM126P stand out among other obd car code readers.
• 🚍➤【5 YEARS WARRANTY】 This diagnostic scan tool provides 5 years warranty and 60-DAY FREE returns for refund or replacement. Pl-ug & Play, no battery or charger required. OM126P OBDII diagnostic scan tool supports a lifetime free software updating and Review & Print diagnostic reports from the Auto fix, via connection to a computer via USB (for Windows 7/8/10 ONLY), if you cannot confirm its compatibility, please feel free to consult us.

Features :

• 【2023 Newest OBD2 Scanner Diagnostic Tool】NC610 car scan diagnostic tool adopts new smart chip and latest user interface design, which perfectly combines OBDII 16-pin and 9-pin (gasoline and diesel). This OBD2 car code reader can easily determine why the check engine light is on, quickly read and erase diagnostic trouble codes, freeze frames, I/M monitor ready status, battery test, smoke test, fuel test, trouble code query library (50000+), read data stream and data playback function.
• 【Heavy Duty Truck Diagnosis + Powerful Data Streaming】: HD OBD heavy duty truck scanner can quickly read engine fault codes (stored fault codes, intermittent, permanent, recorded fault codes) and clear codes, retrieve vehicles Information as well as complete data streams, classify data streams Display real-time vehicle sensor data in text and graphs so you can view them more intuitively. Suitable for Cummins, Caterpillar, Detroit, Packard and other diesel engines with 9-pin connector.
• 【Vehicle coverage】: OBD2 scanner is suitable for most OBDII-compliant vehicles updated after 1996 (OBDII protocol//16-pin diagnostic interface: J1850 (PWM, VPW), ISO_9141-2, ISO_14230-4 (KWP , KWP-5BPS), ISO_15765-4 (CAN, CAN-B, CAN-C, CAN-D)) Compatible vehicles – cars, light trucks, pickups, SUVs, etc. Compliant with J1939 protocol // 9-pin diagnostic interface for light and heavy trucks, engineering vehicles, agricultural vehicles, buses, etc.
• 【The latest design】: Humzor NC610 car OBD2 scanner adopts the latest interface and 2.8in large screen, long-term use will not cause eye fatigue. It is also equipped with three fault indicator lights to display the status, so that you can understand the vehicle status more intuitively and at the same time can execute the car Battery Voltage Test – 12V/24V.
• 【Instructions for use】: NC610 OBD2 car code reader is delivered with a portable tool box and a 9-pin connector. If you encounter any problems when using the NC610 professional scanning tool, you can directly contact us through Amazon Support or send us an email, and we will provide you with professional technical support. We provide hassle-free return service If you are not satisfied with the product, you can contact us directly, we will provide you with efficient after-sales service.
• 【Note】: HUMZOR NC610 Automotive Diagnostic Tool does not require any battery or charger, the OBD reader gets its power directly from the vehicle through the OBDII data link connector. Supports 8 languages – English, German, Polish, Spanish, French, Italian and Russian Chinese.

Features :

• 【For Car DIYers And Beginners】This plug-and-play Autel scanner MS300 can pay for itself in the first use. It communicates with vehicles through standard 16-PIN OBD2 cable and it’s powered by vehicle directly (no battery needed). It capable of scanning vehicle Diagnostic Trouble Codes (DTCs) in seconds to pinpoint emission-related issues. The little guy should be a member of your toolbox, always in your car and ready to be taken out and used.
• 【Read Codes & Clear Codes In Seconds】Getting diagnostic codes(DTCs) should be the start of all repairs if you don’t want to be ripped off. You can use MS300 to read the codes in seconds and look them up 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.
• 【Turn Off Check Engine Light】The check engine light is always annoying you, most of the time because of a little thing, isn’t it? Maybe it’s just a gas cap that’s not tightened but you paid hundreds of dollars for it? With Autel MS300 scan tool, you can read code to quickly find out why the check engine light is on and reset it.
• 【Help You Pass Annual Smog Check】To pass annual smog check, you are better to make the OBD II Readiness Monitors on your car “Ready”. You don’t want to pay for a failed smoke check. MS300 OBD2 scanner can retrieve I/M Readiness status to check the monitors like misfire, fuel system, catalyst, O2 sensors, EVAP, etc, to help your car ready pass the annual smog check.
• 【Works On 99% Vehicles & No-Worry Purchase】Autel MaxiScan MS300 car code reader supports all OBD2 protocols: KWP2000, ISO2000, ISO9141, J1850 VPW, J1850 PWM and CAN. It 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. It comes with a 12-month warranty and free lifetime technical support. If you need any technical support, please feel free to contact us.