Can you use this to diagnosis why check engine light is on and figure out why car wont start? even of car wont start?

MS309 is a OBD2 scanner that can read and clear codes on OBD2 system and help figure out why check engine light is on.

Will this work on a 2002 for explorer sport trac

Yes, MS309 can work on the 2002 Ford Explorer.

i used this tool and all is said was manufacturer control. no code number with it? what does that mean? 1998 ford explorer sport.

OBD2 is the standard across all US cars. Some manufacturers also add brand specific codes, which may or may not be supported by the code reader. Sound like you have a vehicle/manufacturer specific code not supported by a $20 reader.

Can this disable my key?

No, it can't. please check KM100/ IM508/ IM608.

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Description

🔧 Decode your car’s secrets before your next drive!

PLUG DIAGNOSE - No registration needed; just connect to your vehicle’s OBDII port and start scanning in seconds.
SMOG CHECK READY - Monitors emission system status to ensure your car passes annual smog tests hassle-free.
FREEZE FRAME SNAPSHOT - Captures critical engine data at fault occurrence for precise diagnostics and smarter repairs.
INSTANT ENGINE INSIGHT - Reads generic & manufacturer-specific DTC codes with on-screen definitions—no more Googling!
TRUSTED SUPPORT WARRANTY - Backed by 12 months warranty and lifetime tech support—confidence in every scan.

The Autel MaxiScan MS309 is a compact, plug-and-play OBDII code reader compatible with most US vehicles post-1996. It reads and clears engine fault codes, displays freeze frame data, retrieves VIN info, and checks emission readiness to help you pass smog tests. Designed for DIYers and professionals alike, it offers quick diagnostics with no registration required, backed by a 12-month warranty and lifetime support.

Specifications

ASIN	B07Q5H7M5S
Amazon Bestseller	#925,019 in Automotive ( See Top 100 in Automotive ) #654 in Code Readers & Scan Tools
Batteries Included	No
Batteries Required	No
Brand	Autel
Color Name	multicolor
Connectivity Technology	wired
Customer Reviews	4.6 4.6 out of 5 stars (15,941)
Date First Available	July 12, 2019
Included Components	Download MS309 User Manual: https://www.autel.com/u/cms/www/202004/23032946p9xd.pdf, MS309 Autel HQ w-eb: https://www.autel.com/mk1/3264.jhtml
Item Model Number	00063-25
Item Weight	180 Grams
Item model number	00063-25
Manufacturer	Autel
Product Dimensions	24.64 x 16.51 x 5.59 cm; 180 g
Size	MS309

Reviews

A**Z

Excelente, pero no tiene la marca AUTEL

Compré este pequeñín para revisar códigos de mis carros en casa. Es muy rápido, y aunque es muy básico, bien vale la pena; pues lo podemos transportar en la guantera, o con la herramienta. También resulta una gran ayuda si te gusta hacer mecánica en casa, o para dar seguimiento a fallas intermitentes o recurrentes. Todo muy bien. Sin embargo, no pude encontrar la marca Autel por ningún lado ni en el producto, ni el empaque.

6.11.2023

S**R

Quality 10/10-price perfect 10/10-delivery lightning fast -110% satisfaction : )

30.09.2025

C**R

Good scanner

7.03.2026

M**R

Not compatible with the ford edge 2008

17.07.2022

S**A

Excelente

Encanto

2.12.2024

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