{"product_id":"firstool-v390-obd2-scanner-obdii-diagnostic-code-reader-with-i-m-readiness-12v-battery-test","title":"FIRSTOOL V390 OBD2 Scanner — OBDII Diagnostic Code Reader with I\/M Readiness \u0026 12V Battery Test","description":"\u003cp\u003e\u003cstrong\u003eFIRSTOOL V390 is a compact OBD2 diagnostic scanner that reads and clears engine fault codes, checks I\/M readiness and tests 12V batteries for vehicles built after 1996.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe FIRSTOOL V390 gives drivers and mechanics a fast, straightforward way to diagnose common automotive problems without guesswork. Plug it into your vehicle’s OBDII port to retrieve generic and manufacturer-specific codes, view live sensor data, run emissions readiness checks and evaluate battery voltage. Its built-in code database and clear on-screen definitions help you understand issues so you can decide whether to DIY the repair or seek professional service.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the V390 identify and explain trouble codes?\u003c\/h3\u003e\n\u003cp\u003eThe V390 scans for stored, pending and permanent Diagnostic Trouble Codes (DTCs) and displays plain-language definitions from an integrated database of over 40,000 faults. You can read code details on the unit and use the device to clear codes once repairs are completed, which also resets the Malfunction Indicator Light (MIL) when appropriate.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReads generic and manufacturer-specific DTCs\u003c\/li\u003e\n  \u003cli\u003eShows freeze-frame data to capture the conditions when a code set\u003c\/li\u003e\n  \u003cli\u003eBuilt-in 40,000+ code definitions for immediate reference\u003c\/li\u003e\n  \u003cli\u003eClears codes and turns off the check engine light after fixing faults\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan the scanner help me prepare for an emissions (SMOG) test?\u003c\/h3\u003e\n\u003cp\u003eThe V390 includes an I\/M readiness check that inspects the status of emission system monitors to determine whether your vehicle is ready for inspection. Running this check before the test can save time and money by identifying which monitors are incomplete or failing so you can address issues first.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePerforms one-click I\/M readiness status checks for OBDII-compliant vehicles\u003c\/li\u003e\n  \u003cli\u003eIdentifies incomplete or failed emissions monitors that may cause test failure\u003c\/li\u003e\n  \u003cli\u003eSupports common OBDII protocols used in cars made after 1996\u003c\/li\u003e\n  \u003cli\u003eHelps you avoid unexpected SMOG test rejections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat live data and tests can I read with this tool?\u003c\/h3\u003e\n\u003cp\u003eBeyond codes, the V390 streams real-time sensor information so you can watch RPM, coolant temperature, fuel trims and other key parameters while the engine runs. It also offers specific checks like EVAP leak testing and a battery voltage test to help pinpoint non-code issues.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReal-time display of RPM, coolant temperature, vehicle speed and airflow\u003c\/li\u003e\n  \u003cli\u003eOxygen sensor testing and EVAP leak test capabilities\u003c\/li\u003e\n  \u003cli\u003e12V battery voltage monitoring to assess battery health quickly\u003c\/li\u003e\n  \u003cli\u003eVIN\/CIN retrieval and freeze-frame data for detailed diagnostics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the V390 compatible with my vehicle and easy to use?\u003c\/h3\u003e\n\u003cp\u003eThe V390 works with most OBDII\/CAN 16-pin vehicles: U.S. cars from 1996, EU models from 2003, and many Asian vehicles. It’s compact, durable and designed for plug-and-play use—no software downloads or batteries required—making it suitable for DIYers and professionals alike.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSupports J1850PWM, J1850VPW, ISO9141, KWP2000 and CAN protocols\u003c\/li\u003e\n  \u003cli\u003eWorks with passenger cars, SUVs and light trucks using the OBDII standard\u003c\/li\u003e\n  \u003cli\u003eSmall, impact-resistant housing and a simple 5-key interface\u003c\/li\u003e\n  \u003cli\u003eMulti-language menus including English, Spanish, French, German and more\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The FIRSTOOL V390 is ideal for vehicle owners who want clear, actionable diagnostic information without expensive shop visits, as well as for technicians who need a reliable, portable code reader for routine diagnostics. It’s especially useful if you regularly monitor emissions readiness, perform basic troubleshooting, or want to check battery health quickly before long trips or inspections.\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: Which vehicles will the FIRSTOOL V390 work with?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It supports most OBDII 16-pin vehicles: US models from 1996, EU from 2003, and many Asian cars that use OBDII\/CAN protocols.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the V390 clear the check engine light?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — after reading and resolving stored DTCs, the V390 can clear codes and reset the Malfunction Indicator Light when appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"FIRSTOOL","offers":[{"title":"Default Title","offer_id":67591471923385,"sku":"B0G5XSJ59G","price":71.29,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/firstool-v390-front-view.jpg?v=1790552484","url":"https:\/\/redleafauto.ca\/products\/firstool-v390-obd2-scanner-obdii-diagnostic-code-reader-with-i-m-readiness-12v-battery-test","provider":"Redleaf Auto","version":"1.0","type":"link"}