{"product_id":"topdiag-t300pro-obd2-scanner-battery-tester-3-in-1-car-code-reader-with-cranking-test-2-8-color-display","title":"TopDiag T300Pro OBD2 Scanner \u0026 Battery Tester — 3-in-1 Car Code Reader with Cranking Test, 2.8\" Colour Display","description":"\u003cp\u003e\u003cstrong\u003eThe TopDiag T300Pro is a 3-in-1 car diagnostic tool that combines a full OBD2 code reader, a 6-mode 12V battery and charging system tester, and an ECU breakout\/cranking test in one handheld unit.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for drivers, DIY mechanics and small shops, the T300Pro puts comprehensive vehicle diagnostics into a simple plug-and-play device. It reads and clears engine codes from a built-in database of over 30,000 DTCs, monitors live sensor data, runs I\/M readiness checks for smog pre-inspections, and performs professional battery and cranking tests — all without needing a phone app or external power. The rugged 2.8\" color display and data record\/playback make intermittent faults easier to diagnose and to demonstrate repair results to customers or colleagues.\u003c\/p\u003e\n\n\u003ch3\u003eHow will the T300Pro help me find and understand check engine light codes?\u003c\/h3\u003e\n\u003cp\u003eThe scanner reads stored and pending engine fault codes, decodes their meanings from the onboard DTC library, and lets you clear codes after repairs. It also shows freeze frame and live data snapshots so you can see the conditions that triggered a code.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eImmediate DTC read\/clear from a 30,000+ code database\u003c\/li\u003e\n  \u003cli\u003eFreeze frame data and live sensor graphs for context\u003c\/li\u003e\n  \u003cli\u003eVIN lookup and MIL status to verify vehicle identity\u003c\/li\u003e\n  \u003cli\u003eWorks across major OBD2 protocols and vehicle regions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat battery and cranking diagnostics does it perform?\u003c\/h3\u003e\n\u003cp\u003eThe T300Pro runs six dedicated 12V battery and charging tests to evaluate battery state-of-health (SOH), state-of-charge (SOC), cold cranking amps (CCA), internal resistance, starter cranking performance, and alternator voltage. That helps you pinpoint whether a battery, starter or alternator is the root cause before replacing parts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSOH, SOC, CCA and internal resistance measurements\u003c\/li\u003e\n  \u003cli\u003eStarter cranking test to assess cranking performance\u003c\/li\u003e\n  \u003cli\u003eAlternator charging voltage analysis during run and load\u003c\/li\u003e\n  \u003cli\u003eSupports Flooded, AGM (flat\/spiral), EFB and GEL 12V batteries\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan it diagnose communication and ECU interface issues?\u003c\/h3\u003e\n\u003cp\u003eYes — the exclusive OBD breakout circuit helps trace ECU communication faults, loose wiring, and port power problems that stop ordinary scanners from connecting. It’s especially useful for training, troubleshooting unresponsive interfaces, and confirming wiring or connector repairs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e16-pin ECU breakout testing to find wiring and port faults\u003c\/li\u003e\n  \u003cli\u003eDetects vehicle-side power or signaling issues quickly\u003c\/li\u003e\n  \u003cli\u003eUseful for professional repairs and technical training\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it work on my vehicle and how easy is it to use every day?\u003c\/h3\u003e\n\u003cp\u003eThe T300Pro is plug-and-play and draws power from the vehicle OBD2 port — no batteries or apps required. It supports OBD2 gasoline vehicles (1996+ US, 2001+ Europe, 2008+ Asia) and 12V motorcycles, plus multiple OBDII protocols and multi-language menus.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInstant power-up from the vehicle OBD2 port — no setup\u003c\/li\u003e\n  \u003cli\u003e2.8\" TFT color screen with graphical live data and playback\u003c\/li\u003e\n  \u003cli\u003eMulti-language support and user-friendly menus\u003c\/li\u003e\n  \u003cli\u003eRecords and plays back data to compare before\/after repairs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The TopDiag T300Pro is built for car owners who want to understand and verify repairs, DIY mechanics who need a reliable in-car diagnostic and battery tester, and small repair shops that want a compact, multi-function tool without investing in multiple devices. It’s particularly helpful for anyone who needs quick smog pre-checks, dependable battery and cranking tests, or the ability to diagnose tricky ECU communication faults.\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 T300Pro need batteries or a phone app?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — it powers directly from the vehicle OBD2 port and works standalone, no phone app required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which vehicles are compatible with this scanner?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Supports 12V OBD2 gasoline vehicles: 1996+ US, 2001+ Europe, 2008+ Asia, and 12V motorcycles.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TopDiag","offers":[{"title":"Default Title","offer_id":55171451257175,"sku":"B0GJ5GCJMY","price":61.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/topdiag-front-view.jpg?v=1790445873","url":"https:\/\/britishgarage.co.uk\/products\/topdiag-t300pro-obd2-scanner-battery-tester-3-in-1-car-code-reader-with-cranking-test-2-8-color-display","provider":"British Garage","version":"1.0","type":"link"}