FOXWELL NT201 OBD2 Code Reader

FOXWELL NT201 OBD2 Scanner with Live Data & I/M Readiness

OBD2 code reader with real-time live data graphs and I/M readiness checks. Diagnose check engine lights quickly at home or in the shop.

4.5 (9997 Amazon ratings)
Price on Amazon$39.99

Amazon price checked Jun 14, 2026

Overview

Read & Clear Check Engine Light: When your dashboard lights up with that check engine light, FOXWELL NT201 puts the answers in your hands. Plug it into your vehicle’s OBD2 Scanner, and within seconds you’ll see exactly what triggered the warning. This engine code reader allows you to read the fault code, understand the issue, and after making repairs, clear the code to turn off the light. No more expensive diagnostic fees at the repair shop—just straightforward information when you need it most.

Vehicle Compatibility

Compatible with Cars Since 1996: FOXWELL NT201 code reader works with virtually all 1996 and newer gasoline-powered vehicles sold in the United States, including sedans, SUVs, light trucks, minivans, and hybrids that use the standard 16-pin OBD2 connector. This car reader diagnostic for all cars is designed specifically for engine and emissions diagnostics. It does not work with electric vehicles, 24V heavy-duty trucks, or non-engine systems such as ABS brakes, airbags, or transmission.

Plug-and-Play Simplicity with Lifetime Free Updates: Designed with everyday car owners in mind, FOXWELL NT201 requires no special skills or technical background. Simply locate your vehicle's OBD2 scanner connection (usually under the dashboard), plug in the scanner, and power it on—no external power source or battery required. You pay a single price and get everything included—no monthly fees, no surprise charges. Plus, the scanner comes with lifetime free updates to ensure it remains compatible with newer vehicle models as they hit the road. It's a one-time investment that keeps working for you year after year.

Why Choose This Tool

One Key Emissions Readiness Check: Worried about passing your state’s smog check or annual inspection? This car scanner takes the guesswork out of the process with a dedicated hotkey for I/M readiness testing. Press it once, and the scanner immediately shows you whether your vehicle’s emission monitors are ready for testing. The color-coded indicator lights (red/yellow/green) give you a clear visual status at a glance—no menu diving, no technical know-how required. Use it before heading to the testing station and avoid the disappointment of being turned away.

Live Data & Oxygen Sensor Diagnostics: This diagnostic scanner displays live data as you drive or idle, providing insight into your vehicle’s health. Monitor RPM, coolant temperature, intake air temperature, oxygen sensor readings, and other key parameters on the crisp 2.4-inch color screen. Whether tracking down intermittent issues or monitoring engine performance, live data helps you catch small problems before they become costly repairs. The scanner also supports live O2 sensor test mode for vehicles using the CAN protocol, allowing you to analyze exhaust gas oxygen content and evaluate engine efficiency—a valuable vehicle diagnostic tool for fuel mixture and catalytic converter issues.

FAQ

What can the FOXWELL NT201 read?
The NT201 reads and clears engine OBD2 codes, displays live data, runs I/M readiness monitors, and shows freeze frame data for 1996+ vehicles.
Does the NT201 support bidirectional tests?
No. The NT201 is a basic code reader. For active tests and module commands, consider the NT301, NT624 Elite, or NT809BT.