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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🔧 Diagnose like a pro, drive with confidence!

SMOG CHECK READY - Verify I/M readiness monitors to breeze through annual emissions tests without surprises.
FREEZE FRAME SNAPSHOT - Access real-time engine parameters like RPM, fuel pressure, and coolant temp for precise diagnostics.
POCKET SIZED POWERHOUSE - Compact, plug-and-play design with built-in 3000+ DTC database saves time and stress on the go.
UNIVERSAL COMPATIBILITY - Works seamlessly with all OBD2 protocols across US, EU, and Asian vehicles since 1996+.
DECODE CLEAR IN SECONDS - Instantly read and erase generic & manufacturer-specific trouble codes to avoid costly repairs.

The Autel MaxiScan MS309 is a compact, wired OBD2 scanner designed for 99% of OBD2-compliant vehicles worldwide. Featuring an upgraded chip and a built-in database of over 3000 diagnostic trouble codes, it quickly reads and clears engine codes, displays detailed DTC definitions, and provides freeze frame data including key engine parameters. It also checks I/M readiness for smog tests and retrieves vehicle info like VIN and calibration IDs, making it an essential tool for car owners who want to save time, avoid unnecessary repairs, and maintain peak vehicle performance.

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Color Name	multicolor
Batteries Included	No
Batteries Required	No
Brand	Autel
Manufacturer	Autel
Item Model Number	00063-25
Included Components	MS309 Autel HQ w-eb: https://www.autel.com/mk1/3264.jhtml, MS309ユーザーマニュアルをダウンロード: https://www.autel.com/u/cms/www/202004/23032946p9xd.pdf
Connectivity Technology	wired
Size	MS309
Product Dimensions	24.64 x 16.51 x 5.59 cm; 180 g
Item Weight	180 Grams

MaxiScan MS309 CAN OBD II-Lecteur de Code

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