SKU: 7495029790

Autel MaxiScan MS309 Car Code Reader Check/ Clear Engine Fault Codes Universal OBD2 Diagnostic Scanner

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Description

Autel MaxiScan MS309 Car Code Reader Check/ Clear Engine Fault Codes Universal OBD2 Diagnostic ScannerAutel MaxiScan MS309 OBD2 Scanner Engine Fault Code Reader Quickly scan and define Vehicle Diagnostic Trouble Codes (DTCs) with this user friendly "handy little tool". It is a compact code reader that allows you to view Vehicle VIN, Freeze Frame Data, check I M Readiness (Emissions), and monitor status before going for an annual SMOG CHECK. The MS309 is the go to tool for quickly assessing vehicle health status. It does not require battery power as it

Autel MaxiScan MS309 OBD2 Scanner Engine Fault Code Reader

Quickly scan and define Vehicle Diagnostic Trouble Codes (DTCs) with this user-friendly "handy little tool". It is a compact code reader that allows you to view Vehicle VIN, Freeze Frame Data, check I/M Readiness (Emissions), and monitor status before going for an annual SMOG CHECK. The MS309 is the go-to tool for quickly assessing vehicle health status. It does not require battery power as it is powered by plugging the OBD2 cable into the vehicle's OBD2 socket.

Autel MaxiScan MS309 Main Features

  • 1. Read Codes
  • 2. Clear Codes
  • 3. Turn Off Check Engine Light
  • 4. View Freeze Frame Data
  • 5. Define Diagnostic Trouble Codes
  • 6. O2 Sensor Test
  • 7. Component Test
  • 8. View Vehicle Information
  • 9. On-Board Monitor Test
  • 10. I/M Readiness Status(Smog Check)
  • 11. OBD II Readiness Monitors
  • 12. OBD II Monitor Readiness Status

View Freeze Frame Data

Autel MaxiScan MS309 is a basic and universal OBD2 code reader with View Freeze Frame function.

  • 1. To view the freeze frame, use the SCROLL button to select "View Freeze Frame" from the Diagnostic Menu and press the ENTER/EXIT button.
  • 2. Wait a few seconds while the code reader validates the PID MAP.
  • 3. If the retrieved information covers more than one screen, use the SCROLL button as necessary until all data have been displayed.
  • 4. The number "x/x" in the upper right corner of the screen indicates the total number of screens the retrieved freeze frame covers and the sequence of currently displayed data.
  • 5. If no freeze frame data is available, an advisory message saying "No Freeze Frame Data Stored!" will be displayed.

Retrieve I/M Readiness Status

The I/M Readiness function is used to check the operations of the Emission System on OBD2 compliant vehicles. It is an excellent function to use prior to having a vehicle inspected for compliance with state emissions programs. Some of the latest vehicle models may support two types of I/M Readiness tests.

  • Since DTCs Cleared: indicates status of the monitors since the DTCs are erased.
  • This Drive Cycle: indicates status of monitors since the beginning of the current drive cycle.

An I/M Readiness Status result of "NO" does not necessarily indicate that the vehicle being tested will fail the state I/M inspection. In some states, it is permissible for one or more monitors to be "Not Ready" and still pass the emissions inspection.

Retrieve Vehicle Info

The Autel MS309 supports DTC definitions. The definitions will be displayed alongside the codes, providing you with an easier way to read and quickly understand the meaning of the detected fault codes. There is no need to search online for the meaning of the codes.

The Autel MS309 is a useful tool for retrieving a vehicle's VIN. This function proves to be very helpful when purchasing a used vehicle from the market. By retrieving the VIN, you can accurately determine the car's true year and avoid being overcharged.

DTC Definitions Display Below The DTCs Detected

The Autel MS309 supports DTC definitions. The definitions will be displayed under the codes, providing you with an easier way to read and quickly understand the meaning of the detected fault codes. There is no need to search online for the meaning of the codes.

Retrieve Codes & Turn Off Check Engine Light

The Autel MS309 universal OBD2 scanner not only reads and clears generic codes (P0, P2, P3, and U0), but also supports manufacturer-specific codes (P1, P3, and U1), as well as pending codes.

This function is performed with the key on and the engine off (KOEO). Do not start the engine.

Caution: Erasing the Diagnostic Trouble Codes may result in the code reader deleting not only the codes from the vehicle's on-board computer but also the "Freeze Frame" data and manufacturer enhanced data. Additionally, the I/M Readiness Monitor Status for all vehicle monitors will be reset to a Not Ready or Not Complete status. Do not erase the codes until the system has been thoroughly checked by a technician.

Wide Vehicle Coverage

Vehicle OBD support in various regions (for reference)

  • European Region: OBD is only supported after 2006;
  • Americas: OBD is only supported after 1996;
  • Americas: OBD is only supported after 1996;

Autel MaxiScan MS309 Specifications

Display Backlit, 128x64 pixel display
Operating Temp 0 to 60 ℃ (32 to 140 ℉)
Storage Temp -20 to 70 ℃ (-4 to 158 ℉)
Power 8 to 18 V provided via the vehicle battery
Dimensions (LxWxH) 110.3 mm (4.34") x 69.5 mm (2.74") x 20.2 mm (0.80")
Weight NW: 180 g (0.39 lb.); GW: 210 g (0.46 lb.)

Packing List:

  • 1x MaxiScan MS309 Main Unit
  • 1x 16 PIN Standard OBD II Cable

MS309 Product guides and documents

MS309 User Manual (PDF)

Certificate

www.diagmart.com is Autel Authorized Online Agent. Products Created by Autel ® Innovation & Quality You Can Trust.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 7495029790

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4.6 ★★★★★
Based on 18 reviews
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Verified Purchase
Bonnie Murphy
West Palm Beach, US
★★★★★ 5
It's lasted
Size: 20.0"L x 20.0"W x 6.0''TH, Style: Round, Pattern Name: Bed
I've had this bed for 5 years and it is still in great shape. Washes up in the washing machine just fine. My littlest dog absolutely loves it and is lost when our other bigger dog steals it. She barely fits in it but she loves it too. Ha! Good quality at a good price. Couldn't ask for more.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
R
Verified Purchase
Robert A. Martin
Draper, US
★★★★★ 5
My Puppy Loves It.
Size: 20.0"L x 20.0"W x 6.0''TH, Style: Round, Pattern Name: Bed
I didn't know what to expect when I saw this advertised, but some reviews said that their puppy had chewed on it and it was still holding up with no holes. So, I decided to get it and see for myself. I have to say that my puppy loves it and chews on it and it is holding up very well. No holes yet and I suspect after all her chewing and no holes, there won't be any. Nice size for a 25 pound dog and smaller. Well built and nice looking bed. It has enough padding to make it soft for my puppy. I got it big enough, so she can grow into it, too. Well satisfied and I do recommend it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
A
Verified Purchase
Angela
Chelsea, US
★★★★★ 4
Great basic dog bed
Size: 20.0"L x 20.0"W x 6.0''TH, Style: Round, Pattern Name: Bed
We really needed additional places for my dog to rest, besides hanging out on the furniture. He gets to be a little jerky and presumptuous, thinking he owns the joint when he lies all over the bed and couches. So the extra dog beds were necessary additions to the house. He took to this one right away. Sure, he still will try to sneak onto the human bed, the couch, the chair - especially when food is involved in the picture. But he does like this bed. The only real negative I have is that it's whitish on top. It shows dirt kind of easily and time will tell how well it will stand to multiple washings. It's soft. It's cushy. It looks pretty descent for a dog bed. He can curl up in it nicely and relax. Basically it does what it should and he seems relatively happy to hang out on it. Now, if Amazon could make a dog bed that could actually train the dog - that would be incredible!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2020
D
Verified Purchase
Dogmastah3000
Whiting, US
★★★★★ 5
Better than beds I've spent double the money on!
Size: 20.0"L x 20.0"W x 6.0''TH, Style: Round, Pattern Name: Bed
This bed is actually amazing for the price. My chihuahua digs a hole through every bed he's ever had except this one. The bottom actually went flat before he was able to dig a hole into the fabric. But since its such a great bed, i cut open the bottom and restuffed it from the filling from an old pillow and stitched it back up so he can keep enjoying it. Abd if he eventually does dig a hole in it, ill be rebuying this same bed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
S
Verified Purchase
Somebodyzmom
San Leandro, US
★★★★★ 5
My cat used it right away!
Size: 20.0"L x 20.0"W x 6.0''TH, Style: Round, Pattern Name: Bed
My large long-hair orange cat is a bed hoarder. He has at least 5 or 6 beds around the house, and uses every one of them (at different times, of course). But lately he's started sleeping on my pillow during the day, but going to bed at night on a pillow covered in his long orange hair wasn't cutting it for me. So I purchased one more bed for him - because heaven help me if I should move one of his other beds. What we won't do for our babies! Anyway, I put this new bed near my pillow and he's been using the bed instead of my pillow. It's soft and the bolsters are thick and it's just the right size for him to curl up in! He loves it! Win-win!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026

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