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Autel

Autel MS309 OBD2 Scanner Universal Car Engine Fault Code Reader

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Availability: In Stock.
Fulfilled by Amazon
Arrives Oct 17 – Oct 18
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Features

  • Important Tips Before Purchase1 Compatible with standard OBD II vehicles manufactured from 1996 onward in the US market. 2 Due to the Secure Gateway (SGW) / FCA AutoAuth security system, this tool is unable to access OBDII modules or clear codes for FCA vehicles (including Chrysler, Dodge, Jeep, etc.) produced after 2017. 3Vehicles equipped with an SGW module are also not supported. 4Functions are not universal. Please send a mes-sage via Am-azon or cont-act us at auteldirect @ outlook . com to confirm compatibility before ordering.
  • How to Get the PDF User ManualA) Download it directly from the "Product guides and documents" section on the Am-azon product page. B) Mes-sage us via Am-azon or em-ail auteldirect @ outlook . com , and well send you the PDF version within 24 hours. Please Note: This product does not support full engine system diagnostics or advanced parameter display. If you require these functions, please consider upgrading to models such as the Autel MD906 Pro or MK808BT Pro. The Autel MS309 is not listed on the US distributors website. It is exclusively available on the Autel HQ global site. If you need the w-eb, feel fr-ee to con-tact us.
  • How to Use?The Autel MS309 is a plug-and-play device no registration required. Steps: 1Insert the k- and turn to the ON position, but keep the engine OFF. 2Connect the MS309 to your vehicles OBD-II port using the provided cable. 3Select the desired function from the on-screen menu to begin. Please Note: The MS309 uses a standard OBD-II connector (16-pin). Please ensure your vehicles port is compatible and the connection is secure.
  • [TURN OFF CHECK ENGINE LIGHT] This car diagnostic tool supports Reading DTCs, displaying DTC definition under the codes, 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.
  • [USER-FRIENDLY DESIGN] This check engine code reader features two easy-to-use buttons, namely: "Enter/ Exit" and "Scrool" buttons, which are very easy to operate. It comes with backlit display, and 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 tech supports are offered by this Automobile OBDII scan tool. If need any tech support, please feel fr-ee to con-tact us via auteldirect @ outlook . com.

Description

From MS300, MS309 code readers to MS908S Pro, MS Ultra, IM608 Pro, E-car charging pile etc. - Autel is Built for Automotive Diagnostics Autel is one of the world’s lea.ding manufacturers of professional automotive diagnostic tools and accessories in the automotive aftermarket since 2004. Autel has been committed to creating ma.ximum value to customer worldwide to satisfied various needs by providing qua.lity-assured, user-friendly, and innovative products. Started from MS300 MS309 coder reader, Autel founder Mr. Li realized more and more comprehensive automotive diagnostic tools are needed to solve various car repair issues. Owning a team of more than 1,000 engineers, and tens of both online and local authorized distrib.utors across the world, Autel is dedicated to develop premium vehicle aftermarket products. Autel is continously creating leading automotive aftermarket products, such as diagnostic tools, TPMS, battery, e-car charging pile products &services. Tips: Tips: MS309 Autel HQ w-eb: https : // www . autel . com/mk1/3264 . jhtml MS309 PDF User Manual: https : // www . autel . com/u/cms/www/202004/23032946p9xd . pdf Turn off check engine light Autel MS309 obd2 engine analyzer read engine related fault codes stored(hard codes) and pending codes (intermittent codes) in the ECU and display DTCs(diagnostic trouble codes) definitions on the TFT color display. It retrieves generic (P0, P2, P3, and U0), manufacturer specific (P1, P3, and U1) codes. The MS309 car engine code reader helps you figure out why the check engine light is on, fix the problem and clear the codes, turn off MIL(Malfunction Indicator Light) light and reset monitors. View Freeze Frame Data The Autel MS309 auto code reader is most useful while diagnosing continuous monitor faults like engine misfire and fuel control concerns. When an emissions related fault occurs, the OBD II system not only sets a code but also records a snapshot of the vehicle operating parameters to help in identifying the problem. This set of values is referred to as Freeze Frame Data and may include important engine parameters such as engine RPM, vehicle speed, mass airflow, engine load, fuel pressure, fuel trim value, engine coolant temperature and etc. Smog Check MS309 engine scanner code reader comes with readiness status check function that shows whether all the emission related systems and components are operating within allowable limits to help pass the annual Smog Check. Powerful Compatibility Autel MS309 car OBD2 scanner is Compatible with domestic, Asian and European vehicles, 1996 and newer. And the auto scanner supports all 5 OBDII protocols: KWP2000, ISO2000, ISO9141, J1850 VPW, J1850 PWM and CAN. Retrieve Vehicle Information MS309 automotive scanner retrieves the Vehicle Identification No. (VIN), Calibration ID(s), Calibration Verification Nos. (CVNs). This function is especially useful when you buy a used car and use this little pocket code reader to check whether the VIN matches and make sure the ECU has not been replaced by a garbage car.

Brand: Autel


Power Source: powered by car obd2 socket


Product Dimensions: 2.74"L x 0.8"W x 4.34"H


Operating System: Linux


Screen Size: 1 inches


Brand Name: Autel


UPC: 508825559005 891638744721 713524943653 755263547778 608225589081 634425760166 193195983507 675234379934 702565320417 669954576292 647904097028 712407252318 707273312143


Number of Items: 1


Global Trade Identification Number: 07, 88


Manufacturer: Autel


Included Components: 1


Item Type Name: Universal OBD2 Scanner Check Engine Fault Code Reader, Read Codes Clear Codes, View Freeze Frame Data, I/M Readiness Smog Check CAN Diagnostic Scan Tool


Item Weight: 8.8 ounces


Model Number: MS309


Manufacturer Part Number: MS309


Manufacturer Warranty Description: Manufacturer warranty for 45 days from date of purchase


Power Source: powered by car obd2 socket


Operating System: Linux


Screen Size: 1 inches


Automotive Fit Type: Vehicle Specific Fit


Native Resolution: 128x64


Item Dimensions L x W x H: 2.74"L x 0.8"W x 4.34"H


Item Highlight: CAN Diagnostic Scan Tool, Read and Clear Error Codes, For 1996 or Newer OBD2 Protocol Vehicle


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 17 – Oct 18

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • A Good Tool - Breif Overview Of It's Proper Use Included Here
This tool (and other tools like it) do NOT teach you to repair automobiles! Further, they do NOT allow you to pass most state inspection just be resetting codes. This tool will show you the current generic and manufacturer specific codes that have been triggered, as well as pending codes. It WILL reset the codes, INCLUDING the monitor codes, however, you can't make the car pass inspection by just resetting the codes. All of the, I/M Readiness," monitors MUST re-test and show, "Ready" before you can inspect the vehicle. This scanner WILL show I/M Readiness status, however, so you KNOW that he vehicle has re-run all of the required monitor tests AND PASSED them before you waste time trying to get your vehicle inspected only to fail the inspection. It is back-lit and the back light works well. It is built very well and should give YEARS of trouble free service is not overly abused. (Hey, we all drop stuff form time to time, and this little guy can take it) It is very easy to use and to navigate the menus. More often than not, when someone is considering purchasing this type of, "Stored Code," scanner, they are purchasing it because they have a, "Check Engine," light, (or MIL - Malfunction Indicator Light -same thing, just different terms for it), that they'd like to resolve, and often are addressing this before their vehicle inspection runs out. Though just resetting the codes will NOT help you pass inspection, it WILL help you to determine if repairs made are going to ALLOW you to pass inspection more quickly. Here's how: You read the codes, and PROPERLY DIAGNOSE the cause. After making what you believe to be the corrections needed to resolve the issue that caused the code(s), you use this to reset the ECU. Now, search the internet for your year, make and model vehicle and the term, "Drive cycle." For example, 2005 Subaru Forrester drive cycle." What you are looking for in the search results is instruction for driving the vehicle in such a way as to provide all of the operating conditions needed for all of your vehicle's I/M readiness monitor checks to complete their testing and report the status in the shortest time possible. Every manufacturer creates these, "Drive Cycle," routines so that the factory automotive technicians in the dealerships can make repairs and assure the vehicle's compliance with local emissions laws as quickly as possible. An example of a possible drive cycle (that I'm just making us as an example), might look like: "Allow vehicle to completely cool overnight. (All that really matters here is that the engine be stone-cold before beginning the drive cycle on that particular year make and model. Not all vehicles require this first step, or any other step I make up here. This is just and example) 1.) Start vehicle. 2.) Accelerate slowly to 30 MPH, and maintain speed for 45 seconds. 3.) accelerate slowly to 55 MPH and maintain speed for 30 seconds. 3.) slow to 40 MPH without using the brake or downshifting, and maintain speed for 45 seconds. 4.) Accelerate to 55 mph and maintain speed for 4 minutes. 5.) From 55 mph, come to a complete stop, and place the shift leaver into the "Park" position with your foot off he brake and off the accelerator within 30 seconds. 6.) Allow the engine to idle for 1 minute . . . " Etc. Some drive cycles are fairly involved, and some are very short and simple. None the less, if you can complete the drive cycle without the check engine light coming back on, that's a good sign. Now, follow the instructions that come with Autel MaxiScan309 to connect the unit. You'll have to shut the engine off. (In the industry we call this, "engine off - key out," as this eliminates any confusion about what position the key is in. If the key comes out, you're good) Put he key back in once connected, turn to the RUN position, and check the "I/M Readiness" codes. If all I/M Readiness indicators are reporting either, "OK," "Pass," or, "N/A" your car will now pass that portion of the state inspection. If any say they are incomplete, (I think this scanner says, "INC" for those if memory serves), you need to do the drive cycle again to get them to report. Some of the monitors will say, "N/A." That is FINE. Manufacturers have choices in how to approach emissions compliance on different models, and often several of the monitors do not need to be used, just so long as the ones the manufacturer DID choose to employ do enough testing to ensure compliance with Federal Regulations. One last tip, and this is a real important one. If you don't have the background to decipher diagnostic codes and interpret the likely causes of them, DON'T FRET! Let's say your 2010 Ford Whatchamacallit is throwing a P0442 code, as reported by the scanner. Just search the internet for, "2010 Ford Whatchamacallit P0442 code causes," and you will begin to find all of the information needed to further diagnose the fault, AND are also likely to read the most PROBABLE causes in many cases. Consider the information you find carefully, as there is not test information needs to pas in order to be posted on the internet! lol When you have done enough research about the code's appearance on YOUR specific vehicle, you will easily see trends that point to the most LIKELY causes too. From there, you can start researching how to accurately TEST each suspected part to find out if it really IS the cause or not. Before too long, you should be able to find the REAL cause, and PROVE the part defective for yourself so you are not performing unneeded repairs hoping a, "shot in the dark," will fix whatever is wrong. If you find this review and the other information helpful in full or in part, please click the "YES" box where it asks if it was helpful or not. ... show more
Reviewed in the United States on June 5, 2015 by B. Honest
    • Great code reader
Works as advertised and is great value for a simple code reader with freeze frame data and code clearing. No fancy features but very happy with it for what it is.
Reviewed in the United States on August 20, 2026 by Mark
    • Worked for me (Female Review)
I have a 1997 Honda Civic EX and I have had the car for over 11 years. I am past the point of taking my car to a mechanic to diagnosis and fix every little thing that goes wrong and with me being a female I have noticed the old saying holds true mechanics try to take advantage of me. I am at the point where I hate going into a shop. What made me so desperate to buy this product is I had a check engine issue after I had just paid a mechanic to fix my car a few weeks before he told me nothing was wrong and my engine light came off. A few weeks later when I was due for inspection the light came back on. I refused to pay again for someone to look at my car and not fix a problem. I passed inspection and shocked my NEW mechanic with my knowledge. He gave me money back he was originally charging me $30 to put in a downstream part. I told him what was wrong with my car, and I bought the part for him to put on, but he actually gave me $5 back said it was not a lot of work to just put it on. So good luck everyone. I know dealing with a car can be a huge headache. I did go to the website it is confusing but since I have a Honda I usually just go to the forums, but it works for me since it is a popular old brand. It is easy to use. You just plug it in. Cut it on and it gives a code w a brief code description. Some of the codes are generic so you will need to either google them, go to a forum, some people even discuss them on you tube or buy a book with codes. ... show more
Reviewed in the United States on March 26, 2013 by Bookswagger
    • Quality product at affordable price
Best money I've spent on my problem vehicle. I had O'Reilly's auto scan my vehicle as well as two personal scans. This scanner helped me solve my problem with a better scan than the other three.
Reviewed in the United States on August 28, 2026 by David Britt Price
    • Does exactly what it says it will do
For an inexpensive product, it did everything perfectly. I highly recommend purchasing this product J.C 650i xdrive
Reviewed in the United States on August 5, 2026 by james cassanos
    • Great little scanner
not for a mechanic but for a car owner, it is simple to use, gives the code and you can then look it up and see if more needs to be done.
Reviewed in the United States on August 24, 2026 by Hometown Credit Union
    • Cheap must have
Amazing obd scanner for the price slot of access and info inside
Reviewed in the United States on October 10, 2026 by JAMES GARCIA
    • Works!
Too easy, cleared the bs code.
Reviewed in the United States on July 9, 2026 by Amazon Customer

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