{"product_id":"autel-ms300-obd2-code-reader-compact-obd-ii-scanner-clears-check-engine-light-reports-emissions-readiness","title":"Autel MS300 OBD2 Code Reader - Compact OBD-II Scanner, Clears Check Engine Light \u0026 Reports Emissions Readiness","description":"\u003cp\u003e\u003cstrong\u003eThe Autel MS300 is a compact plug-and-play OBD2 code reader that reads and erases diagnostic trouble codes, resets the check engine light, and reports emissions readiness.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe MS300 is a handheld car scanner designed for drivers who want a simple, reliable way to diagnose basic engine and emissions issues without expensive shop visits. It plugs into any standard 16-pin OBD2 port, powers from the vehicle, and displays diagnostic trouble codes (including many manufacturer-specific DTCs) with in-device definitions and included lookup software. Lightweight and rugged, the MS300 is a practical tool to keep in a glovebox for quick checks and for confirming repairs before heading to a repair shop or smog test.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the Autel MS300 help me identify engine problems?\u003c\/h3\u003e\n\u003cp\u003eThe MS300 reads stored, pending, and permanent DTCs and displays code definitions on-screen so you can understand what triggered the check engine light. After reading codes you can research the meaning with the included software or online references to decide next steps.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRetrieves generic and many manufacturer-specific DTCs.\u003c\/li\u003e\n  \u003cli\u003eDisplays code definitions directly on the device.\u003c\/li\u003e\n  \u003cli\u003eIncludes CD-based lookup software for deeper descriptions.\u003c\/li\u003e\n  \u003cli\u003eQuick readout in seconds after plugging into the OBD2 port.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan the MS300 turn off a check engine light?\u003c\/h3\u003e\n\u003cp\u003eYes — once you confirm the underlying issue has been addressed, the MS300 can clear stored codes and turn off the malfunction indicator lamp (MIL). Clearing codes can also verify whether a fault was temporary or persistent after a repair or maintenance step.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClears engine fault codes and resets the MIL.\u003c\/li\u003e\n  \u003cli\u003eUseful for confirming repairs or dismissing transient faults.\u003c\/li\u003e\n  \u003cli\u003eDoes not replace professional repairs when faults require parts or labor.\u003c\/li\u003e\n  \u003cli\u003eSimple, menu-driven erase function for quick use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this tool help my car pass an emissions (smog) inspection?\u003c\/h3\u003e\n\u003cp\u003eThe MS300 reports I\/M Readiness monitors so you can check whether emissions systems have completed their self-tests. That helps you spot incomplete monitors or ongoing issues that could cause a smog test failure before you pay for the inspection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDisplays readiness status for monitors like O2 sensors, catalyst, EVAP, misfire, and fuel system.\u003c\/li\u003e\n  \u003cli\u003eShows whether monitors are “ready” or still pending.\u003c\/li\u003e\n  \u003cli\u003eHelps avoid surprise smog test failures with a pre-check.\u003c\/li\u003e\n  \u003cli\u003eCompatible with vehicles that support standard OBD2 readiness reporting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat vehicles and protocols does the MS300 support?\u003c\/h3\u003e\n\u003cp\u003eThe MS300 supports the full set of standard OBD2 protocols used worldwide and works on the vast majority of OBD-II compliant cars and light trucks. Typical compatibility covers U.S. vehicles from 1996 onward and many international models from their respective OBD2 adoption years.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSupports all common OBD-II protocols including CAN, ISO, KWP2000 and J1850 variants.\u003c\/li\u003e\n  \u003cli\u003eWorks on about 99% of OBD-II compliant vehicles (passenger cars and light trucks).\u003c\/li\u003e\n  \u003cli\u003ePowered by the vehicle — no batteries required.\u003c\/li\u003e\n  \u003cli\u003eIncludes a 12-month warranty and free lifetime technical support from Autel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Autel MS300 is built for car owners, DIYers, and first-time vehicle technicians who want an affordable, no-frills diagnostic reader to identify and clear engine codes, verify emissions readiness, and avoid unnecessary diagnostic fees. It’s ideal for anyone who wants a fast way to check why a check engine light is on, confirm a repair fixed the underlying issue, or pre-check a vehicle before a smog test. For advanced, bidirectional or live-data diagnostics, professional-grade scanners are recommended, but the MS300 covers the core needs for routine troubleshooting and emissions verification.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the MS300 need batteries?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The MS300 is powered directly from the vehicle’s 16-pin OBD2 port, so batteries are not required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will it work on my car made in 2004?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Most likely yes. It supports standard OBD-II protocols common to 1996+ US and equivalent international OBD-II vehicles.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Autel","offers":[{"title":"Default Title","offer_id":55166046437719,"sku":"B001LHVOVK","price":35.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/autel-ms300-front-view.jpg?v=1790361730","url":"https:\/\/britishgarage.co.uk\/products\/autel-ms300-obd2-code-reader-compact-obd-ii-scanner-clears-check-engine-light-reports-emissions-readiness","provider":"British Garage","version":"1.0","type":"link"}