FOXWELL NT301 Plus OBD2 Scanner & 12V Battery Tester – 2-in-1 Diagnostic Tool, 2.8" Colour Screen

FOXWELL NT301 Plus is a handheld 2-in-1 diagnostic tool that reads/clears OBD-II engine codes and checks 12V battery health with a bright 2.8" color display.

The NT301 Plus builds on the trusted NT301 engine code reader by adding battery diagnostics so you can assess both check-engine causes and battery condition from one compact device. It plugs into any standard 16-pin OBD-II port and displays live engine data while also testing 12V lead-acid battery types including flooded, AGM, EFB and GEL. No subscription or smartphone app is required — just plug in, read results, and decide your next step.

How quickly will this scanner tell me what’s wrong with my check engine light?

Plug the NT301 Plus into your vehicle’s OBD-II port and you’ll see code definitions on the 2.8" color screen within seconds. It reports stored and pending codes and shows live parameters so you can spot intermittent faults.

• Reads and clears standard OBD-II engine codes
• Displays plain-language code explanations on-screen
• Live data stream: RPM, coolant temperature, fuel trims, and more
• Saves and plays back data for review or printing on PC

What does the battery test check and when should I use it?

The built-in battery test evaluates state-of-health (SOH), state-of-charge (SOC), cranking ability and the charging system so you can tell if a battery needs charging, replacement, or further inspection. Use it before long drives, after jump-starts, when a new battery dies early, or during pre-purchase inspections.

• Works with 12V flooded, AGM (flat/spiral), EFB and GEL batteries
• Reports SOH and SOC plus starting/cranking power estimates
• Quick check that helps prevent no-starts and unnecessary replacements
• Requires firm connection of the OBD-II cable for battery tests

Will this unit help me pass emissions or find EVAP leaks?

Yes — the NT301 Plus can run I/M readiness checks and scan for stored emissions-related codes so you can verify smog status before a test. It can also help diagnose EVAP system problems like a loose gas cap or small leaks that cause readiness failures.

• I/M readiness reporting to see emission test readiness
• Detects EVAP system faults that commonly affect smog results
• Finds stored codes a seller might have overlooked during vehicle inspections

Which vehicles are supported and are there any limitations?

The scanner supports most OBD-II vehicles: 1996+ U.S., 2001+ European and 2005+ Asian models using the standard 16-pin connector. It does not cover pre-1996 vehicles or certain manufacturers and specialized systems without extra adapters.

• Compatible with cars, pickups, motorcycles and some ATVs with OBD-II ports
• Not compatible with ABS, SRS/airbag, transmission, key programming, or oil/battery registration functions
• Not suitable for Fiat/ALFA/Lancia or some Peugeot, Citroën, Ssangyong, Lada, VAZ, UAZ and GAZ models
• Windows-only updates; no Mac or iOS updating support

Who this tool is for: the FOXWELL NT301 Plus is designed for car owners, weekend DIY mechanics, used-car buyers, and small shop technicians who want a fast, reliable way to read engine trouble codes and check 12V battery condition without subscriptions or smartphone apps. It’s especially useful when you want actionable information before paying for diagnostics or towing, or when you need to confirm a battery’s condition during routine maintenance or pre-trip checks.