OBD2 Scanner & Car Voltage Tester – Engine Fault Code Reader

Read Engine Fault Codes & Test Car Voltage in One Tool

Stop guessing why your check engine light is on. The OBD2 Diagnostic Scanner V100 plugs directly into your car's OBDII port and instantly reads engine fault codes, clears warning lights, and tests your vehicle's charging system voltage — all without needing a separate battery. It's the compact, no-fuss diagnostic tool every driver should keep in the glove box.

Made in Mainland China.

Key Features

• Engine Fault Code Reading & Clearing: Retrieve and erase stored Diagnostic Trouble Codes (DTCs) to diagnose and reset your check engine light quickly.
• Live Voltage Testing: Monitor your car's battery and charging system voltage in real time — identify weak batteries or failing alternators before they leave you stranded.
• Universal OBDII Compatibility: Works with all OBDII-compliant vehicles (most cars, SUVs, and light trucks sold in the US after 1996).
• No Battery Required: Powers directly from your vehicle's OBD port — no external power source or separate battery needed.
• Wired Connection: Reliable direct OBD-II wired interface — no Bluetooth or WiFi pairing hassles.
• Compact & Portable: Lightweight design that fits easily in your glove compartment or toolbox.
• Easy to Use: Simple plug-and-read interface — no technical expertise required.

What's in the Box

• 1 × OBD2 Diagnostic Code Reader & Voltage Tester (V100, Red)
• No battery included or required

Specifications

• Communication Interface: OBD-II (Wired)
• Wireless Function: None
• Battery: Not included / Not required
• Color: Red
• Compatible Protocols: OBDII standard (ISO 9141, KWP2000, CAN, J1850 PWM/VPW)

Who Is This For?

Whether you're a DIY mechanic, a daily driver who wants to save money on unnecessary shop visits, or just someone who wants peace of mind on the road — this scanner helps you understand what your car is telling you. Pair it with a solid understanding of your vehicle's health and avoid costly surprises at the repair shop.

For more on understanding car diagnostics and what OBD codes mean, visit the U.S. EPA's On-Board Diagnostics (OBD) information page.

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Frequently Asked Questions

Q: Is this OBD2 scanner compatible with my car?

A: This scanner is compatible with all OBDII-compliant vehicles, which includes most cars, SUVs, and light trucks sold in the United States after 1996. Simply locate your vehicle's OBDII port (usually found under the dashboard on the driver's side) and plug in the device.

Q: Does the OBD2 scanner need batteries to work?

A: No — the scanner draws power directly from your vehicle's OBD-II diagnostic port, so no external batteries are required. Just plug it in and it's ready to use.

Q: Can this tool clear the check engine light?

A: Yes. The scanner can read stored engine fault codes (DTCs) and clear them, which will turn off the check engine light. Note that if the underlying issue is not repaired, the light may return.

Q: What does the voltage testing function do?

A: The built-in voltage tester monitors your car's battery and charging system in real time. It helps you detect a weak battery, a failing alternator, or charging irregularities before they cause a breakdown.

Q: Does this scanner connect wirelessly via Bluetooth or WiFi?

A: No — this is a wired OBD-II scanner. It connects directly to your vehicle's diagnostic port with no Bluetooth or WiFi required, making it simpler and more reliable for quick reads.