Skip to main content
FallHalloweenPetLawn & GardenTruck & AutomotiveClothingPoultryHeating & CoolingHorseSporting GoodsOutdoor Power EquipmentFencing & GatesLivestockOutdoor LivingPet & Animal PharmacyToolsHome ImprovementFarm & RanchBoots & ShoesTrailers & TowingHome Decor & FurnitureWild Birds & WildlifeToysGift CardsServices Propane RefillTrailer RentalGarden CenterFeed CenterSame Day DeliveryPetVet ClinicPet WashGrooming at PetsenseDog Training at PetsenseTractor Supply RxPet InsuranceWag!

"Savings and Offers"

Weekly AdSaleClearance

"More Options"

Weekly AdWhat's NewTractor Supply AppEarn Rewards with Neighbor's ClubHometown HeroesLife Out Here BlogTSC Exclusive BrandsTop BrandsClearance ItemsBattery FinderOutdoor Power Equipment Parts FinderHitch Finder

Summer Steals and Deals have arrived

|
Shop Now
Order statusTSC Credit CardsWhat’s newPetsenseWeekly Ad
​

Sign In / Enroll

Get rewarded!

​
Menu

Search

Home

Sign In

Cart
5.0
(1)
5.0 out of 5 stars. 1 review
A woman outside with a dog
A woman outside with a dog
  1. Home
  2. /
  3. Truck & Automotive
  4. /
  5. Garage & Shop Equipment
  6. /
  7. Automotive Tools & Shop Equipment
  8. /
  9. Automotive Diagnostic Tools
  10. /
  11. Code Readers & Scan Tools
  12. /

  13. TOPDON Code Reader - 2.4 in. Screen & Data Graphing

  1. Home
  2. /
  4. /
  5. Code Readers & Scan Tools

TOPDON Code Reader - 2.4 in. Screen & Data Graphing

Shop all TOPDON

  • Limited Time Deal

TOPDON Code Reader - 2.4 in. Screen & Data Graphing

Item # 259126699

TOPDON TOPDON Code Reader - 2.4 in. Screen & Data Graphing
TOPDON TOPDON Code Reader - 2.4 in. Screen & Data Graphing
$44.99

Sale

Was$49.99

Save $5.00

Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Shop all TOPDON

  • Limited Time Deal

TOPDON Code Reader - 2.4 in. Screen & Data Graphing

Item # 259126699

TOPDON TOPDON Code Reader - 2.4 in. Screen & Data Graphing
TOPDON TOPDON Code Reader - 2.4 in. Screen & Data Graphing
$44.99

Sale

Was$49.99

Save $5.00

financeCard Logo
New Cardmembers earn a $20 Reward‡ with qualifying purchase of $20 or more plus earn 5% in Rewards+ on this purchase. Valid through 8/9/26.
​
Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

AL400 builds on basic code reading by adding live graphing, advanced diagnostics, and multilingual support, making it the ideal next-level handheld scan tool for DIYers and shop use. Great for beginners and techs alike.

For additional information on this product, please see the Product Documents section for all downloadable user manuals, installation guides, brochures and warranty statements.

  • Full OBDII diagnostics and live data support
  • Graphing display of real-time sensor values
  • Reads/clears DTCs and emission codes
  • Auto VIN detection + multilingual interface
  • Compact 2.4" backlit screen
  • Freeze frame and onboard monitor tests
  • Great for beginners and techs alike
  • Vehicle-powered-no internal battery
BrandTOPDON
Country of OriginImported
Battery Size12V
CompatibilityAll OBDII vehicles from 1996+
FeaturesAdvanced OBDII functions, full live data graphing, freeze frame, sensor data, multilingual interface, 2.4" LCD
Package Quantity1
Primary MaterialABS Plastic
Product Height0.96 in.
Product Length5.67 in.
Product Weight7.84 oz.
Product Width2.95 in.
Scan Tool TypeTools/Scanners/Code Readers
Warranty1 Year
Manufacturer Part NumberAL400
No questions have been asked about this product.

No questions have been asked about this product.

Q&As

No questions have been asked about this product.

No questions have been asked about this product.

Similar Items

  1. TOPDON 8 in. Scan Tool Full System Diagnostics
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON 8 in. Scan Tool Full System Diagnostics

    $512.99
    Was $569.99Save $57.00
  2. TOPDON Pocket-Size Bluetooth Scan Tool with Bi-Directional Controls
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON Pocket-Size Bluetooth Scan Tool with Bi-Directional Controls

    $99.99
  3. TOPDON UltraDiag One-Year Update
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON UltraDiag One-Year Update

    $329.99
  4. TOPDON 4-Channel Osciliscope with Accessories works with Phoenix Tools
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON 4-Channel Osciliscope with Accessories works with Phoenix Tools

    $895.99
  5. TOPDON Bluetooth Scan Tool with Service Functions & CAN-FD
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON Bluetooth Scan Tool with Service Functions & CAN-FD

    $409.00
  6. TOPDON ArtiDiag 900BT One-Year Update
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON ArtiDiag 900BT One-Year Update

    $249.99
  7. TOPDON ArtiDiag Pro One-Year Update
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON ArtiDiag Pro One-Year Update

    $249.99
  8. TOPDON Phoenix Elite UPDATE Passenger Car-One Year
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON Phoenix Elite UPDATE Passenger Car-One Year

    $549.99
  9. TOPDON Artipad/Phoenix Pro One-Year Update
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON Artipad/Phoenix Pro One-Year Update

    $899.99
  10. TOPDON 8 in. Scan Tool & Key Programming with Bi-Directional Controls
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON 8 in. Scan Tool & Key Programming with Bi-Directional Controls

    $699.99
  11. TOPDON Diagnostic Scan Tool with Oil Reset and Throttle Adaptation Functions
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON Diagnostic Scan Tool with Oil Reset and Throttle Adaptation Functions

    $199.99
  12. TOPDON 7 in. Scan Tool with Service Functions & Bi-Directional Controls
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON 7 in. Scan Tool with Service Functions & Bi-Directional Controls

    $459.00

Items You May Like

  1. Innova CarScan Advisor OBD2 Scan Tool with Live Data, Battery/Charging System Test, Free Fix and Part Recommendations
    4.4 out of 5 stars with 29 reviews
    4.4 (29)

    Innova CarScan Advisor OBD2 Scan Tool with Live Data, Battery/Charging System Test, Free Fix and Part Recommendations

    $89.99
    Was $99.99Save $10.00
  2. Innova CarScan Inspector OBD2 Scan Tool with Oil Level and Oil Life, ABS and SRS, Free Fix and More
    4.6 out of 5 stars with 8 reviews
    4.6 (8)

    Innova CarScan Inspector OBD2 Scan Tool with Oil Level and Oil Life, ABS and SRS, Free Fix and More

    $116.99
    Was $129.99Save $13.00
  3. TOPDON 10.1 in. OE-Level Scan Tool, Cloud-Based Programming, Advance Protocols
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON 10.1 in. OE-Level Scan Tool, Cloud-Based Programming, Advance Protocols

    $2,300.99
  4. TOPDON 8 in. OE-Level Scan Tool, Service Functions, Bi-Directional Controls, CANFD
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON 8 in. OE-Level Scan Tool, Service Functions, Bi-Directional Controls, CANFD

    $859.99
  5. Innova CarScan Diagnostics OBD2 Scan Tool with All-System Network Scan, Maintenance Reset, Free Fix and More
    4.5 out of 5 stars with 14 reviews
    4.5 (14)

    Innova CarScan Diagnostics OBD2 Scan Tool with All-System Network Scan, Maintenance Reset, Free Fix and More

    $161.99
    Was $179.99Save $18.00
  6. Torin 1,250 lb. Big Red Engine Stand
    4.0 out of 5 stars with 103 reviews
    4.0 (103)

    Torin 1,250 lb. Big Red Engine Stand
  7. Eastwood 5 pc. Nylon Trim Removal Tools
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Eastwood 5 pc. Nylon Trim Removal Tools

    $12.99
    Was $14.99Save $2.00
  8. TOPDON One-Year Software Update for Diagnostic Scan Tool
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON One-Year Software Update for Diagnostic Scan Tool

    $119.99
  9. GEARWRENCH Professional Bi-Directional Diagnostic Scan Tool
    4.0 out of 5 stars with 22 reviews
    4.0 (22)

    GEARWRENCH Professional Bi-Directional Diagnostic Scan Tool

    $149.99
  10. GEARWRENCH 5in. Handheld Bi-Directional Diagnostic Tool
    4.5 out of 5 stars with 8 reviews
    4.5 (8)

    GEARWRENCH 5in. Handheld Bi-Directional Diagnostic Tool

    $404.99
    Was $449.99Save $45.00
  11. GEARWRENCH 7 in. Wireless Bi-Directional Diagnostic Tablet
    4.6 out of 5 stars with 18 reviews
    4.6 (18)

    GEARWRENCH 7 in. Wireless Bi-Directional Diagnostic Tablet

    $649.99
  12. Top Rated
    GEARWRENCH Technicians True RMS Digital Multimeter
    4.9 out of 5 stars with 8 reviews
    4.9 (8)

    GEARWRENCH Technicians True RMS Digital Multimeter

    $89.99

Customers Also Bought

  1. Top Rated
    GEARWRENCH Universal Tire Pressure Monitoring System Programming and Diagnostic Tool
    4.9 out of 5 stars with 7 reviews
    4.9 (7)

    GEARWRENCH Universal Tire Pressure Monitoring System Programming and Diagnostic Tool

    $175.99
  2. Prime-Line Telescoping Inspection Mirror, 2 in. Diameter, Extends 28 in.Es, 1 pk., W113006
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Prime-Line Telescoping Inspection Mirror, 2 in. Diameter, Extends 28 in.Es, 1 pk., W113006

    $11.99
  3. TOPDON 10.1 in. OE-Level Scan Tool, Cloud-Based Programming, CANFD
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON 10.1 in. OE-Level Scan Tool, Cloud-Based Programming, CANFD

    $1,619.99
    Was $1,799.99Save $180.00
  4. Top Rated
    GEARWRENCH Automotive Pro True RMS Digital Multimeter
    5.0 out of 5 stars with 5 reviews
    5.0 (5)

    GEARWRENCH Automotive Pro True RMS Digital Multimeter
  5. TOPDON 5 in. Scan Tool - PCM/TCM/ABS/SRS Lifetime Updates 9 Ser Func
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON 5 in. Scan Tool - PCM/TCM/ABS/SRS Lifetime Updates 9 Ser Func

    $207.89
    Was $230.99Save $23.10
  6. GEARWRENCH Everyday Diagnostic Tool Bluetooth OBDII Tester
    4.3 out of 5 stars with 23 reviews
    4.3 (23)

    GEARWRENCH Everyday Diagnostic Tool Bluetooth OBDII Tester

    $69.99
  7. TOPDON 13.3 in. OE-Level Scan Tool, Docking Station, Cloud-Based Programming
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    TOPDON 13.3 in. OE-Level Scan Tool, Docking Station, Cloud-Based Programming

    $3,596.39
    Was $3,995.99Save $399.60
  8. Top Rated
    Innova Pro Automotive Digital Multimeter with Auto Specific Measurements, Protective Guards and Accessories
    4.8 out of 5 stars with 20 reviews
    4.8 (20)

    Innova Pro Automotive Digital Multimeter with Auto Specific Measurements, Protective Guards and Accessories

    $89.99
    Was $99.99Save $10.00
  9. Innova Digital Multimeter Inductive Amp Probe with Standard Multimeter Test Leads
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Innova Digital Multimeter Inductive Amp Probe with Standard Multimeter Test Leads

    $79.99
  10. Top Rated
    Innova Digital Timing Light with Dual Readout Digital Display, Slim Rotating Barrel and Built-in Hand Guard
    4.9 out of 5 stars with 20 reviews
    4.9 (20)

    Innova Digital Timing Light with Dual Readout Digital Display, Slim Rotating Barrel and Built-in Hand Guard

    $80.99
    Was $89.99Save $9.00
  11. Top Rated
    GEARWRENCH 10in. Pro Command Wireless Bi-Directional Diagnostic Tablet with Rapid Charge Dock
    5.0 out of 5 stars with 10 reviews
    5.0 (10)

    GEARWRENCH 10in. Pro Command Wireless Bi-Directional Diagnostic Tablet with Rapid Charge Dock

    $2,276.99
    Was $2,529.99Save $253.00
  12. Innova Professional Timing Light with 4-Function Digital Backlit LCD, Slim Rotating Barrel and Shockproof Housing
    4.1 out of 5 stars with 14 reviews
    4.1 (14)

    Innova Professional Timing Light with 4-Function Digital Backlit LCD, Slim Rotating Barrel and Shockproof Housing

    $129.99

Reviews

Rating Snapshot

Select a row below to filter reviews.

5 starsstars

1
1 review with 5 stars.

4 starsstars

0
0 reviews with 4 stars.

3 starsstars

0
0 reviews with 3 stars.

2 starsstars

0
0 reviews with 2 stars.

1 starstars

0
0 reviews with 1 star.

Overall Rating

5.0

Review this Product

Select to rate the item with 1 star. This action will open submission form.
Select to rate the item with 2 stars. This action will open submission form.
Select to rate the item with 3 stars. This action will open submission form.
Select to rate the item with 4 stars. This action will open submission form.
Select to rate the item with 5 stars. This action will open submission form.
Adding a review will require a valid email for verification
1 to 0 of 1 Review .

1 Ratings-Only Review

Get the top deals, latest trends and more
Sign up for emails from Tractor Supply today.
First Name*
Last Name*
Email*

Customer Support

  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  

    (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

About Us

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

Work With Us

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

Neighbor's Club

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

Credit Center

  • TSC Credit Card

  • Klarna

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More
  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

  • TSC Credit Card

  • Klarna

Connect & Share with the Tractor Supply Community.

Shop on the go with the Tractor Supply App

Learn More
  • Privacy policy
  • Your Privacy Choices
  • Terms and Conditions
  • California Transparency Act
  • Legal Notices
  • Accessibility
  • Responsible Disclosure Statement
  • Surprise (Balance) Medical Billing Disclosure
  • Transparency in Coverage
  • Human Rights Policy
  • Vendor Code of Conduct
  • California Notice of Collection
  • Privacy Requests

© 2026, Tractor Supply Co. All Rights Reserved.