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Description
KONNWEI KW890 2 in 1 Car OBD2 Fault Detector + Maintenance Light Reseter, KW8901. Size: 20x10x3. 5cm 2. Weight: 780g 3. Voltage: DC 12V 4. Screen display: 2. 8 inches color LCD screen 5. Combo: OBD2 Engine Scan, OBD1 Engine Scan, O2 Sensor Test, EVAP System Monitor, Battery Voltage Test, Troubleshooter Code Prompt, MIL Off, Live Data Streaming, Boot Test, Charge Test, Voltage Waveform, Oil Reset 6. Application: 12V OBD2 & 1 car, light truck, sedan, SUV 7. Main functions: read and clear fault codes, read real time sensor data,
1. Size: 20x10x3.5cm2. Weight: 780g
3. Voltage: DC 12V
4. Screen display: 2.8 inches color LCD screen
5. Combo: OBD2 Engine Scan, OBD1 Engine Scan, O2 Sensor Test, EVAP System Monitor, Battery Voltage Test, Troubleshooter Code Prompt, MIL Off, Live Data Streaming, Boot Test, Charge Test, Voltage Waveform, Oil Reset
6. Application: 12V OBD2 & 1 car, light truck, sedan, SUV
7. Main functions: read and clear fault codes, read real-time sensor data, display data stream, find fault codes, prompt fault codes
8. Supported languages: English, French, German, Spanish, Russian, Italian, Polish
9. Free benefits: support PC free upgrade system and print data
10. Supported protocols: ISO 9141 / KWP2000 / SAE J1850 / CAN / J1850 VPW / J1850 PWM
Features:
1. KW890 OBD2 car diagnostic scanner is suitable for all OBD II compliant 1996 and newer 12V gasoline and diesel.
2. This product can recognize the reason of your CHECK ENGINE and can repair it automatically. It also helps you easily pass annual emissions tests and smog inspections.
3. This product covers the complete OBDII/EOBD diagnostic function of the engine system. The O2 sensor test, EVAP system test and board monitoring test give you full control over the operating status of your vehicle, while the graphical and numerical live data stream displays will help you pinpoint erroneous sensor readings.
4. KW890 is also a digital battery tester for 12V lead-acid car, SUV, light truck batteries.
5. The KW890 battery tester can test all automobile starting lead-acid batteries, including ordinary lead-acid batteries, AGM flat batteries, AGM spiral batteries, gel batteries, lithium batteries, etc., using the most advanced conductivity testing technology in the world, easy, fast and accurate Accurately measure the actual cold cranking current capability of the vehicles starting battery, the state of battery health itself, and common faults of the vehicles starting system and charging system, which can help maintenance personnel quickly and accurately find the problem, so as to achieve rapid vehicle repair.
6. Special Function - Oil Reset: This function allows you to reset the engine oil life system, and calculates the optimal oil life replacement interval based on the vehicles driving conditions and climate.
7. The engine oil reset function can be performed under the following conditions:
- If the service light is on, you must service the car. After the maintenance is completed, it is necessary to reset the driving mileage or driving time, so that the maintenance light goes out, and the system starts a new maintenance cycle.
- After an oil change or an appliance that monitors oil life, you will need to reset the service light.
Specification:
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Perfect for ROG Ally X
Want to hook up a keyboard, mouse, headset, AND external display to a ROG Ally X? This will do it and it only takes up one (USB4) port on the Ally X. Oh, and it will also provide enough power to charge the Ally and still have juice for all the other ports.
Update: I’ve now tried a few USB4 hubs because I also want Ethernet which this doesn’t have. Unfortunately I’ve discovered that most of them seem to overheat after awhile and I loose connectivity on some of the ports (for whatever reason it’s always the type A ports on the hubs that fail). After letting them cool down, the other USB hubs work again, but it’s still frustrating. This StarTech hub is the only one that works for hours. It’s a little bulkier than other hubs I’ve tried, but that’s probably because it needs to be that way for proper heat dissipation?? Anyway, I wish it had a few more ports (including Ethernet), but for reliability this thing is the best I’ve found.
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Reviewed in the United States on July 31, 2024
★★★★★ 5
The Best!
This thing is amazing! Worked right out of the box. No drivers to install, no confusion, just plug and go. I'm using this hub to connect a mouse, a keyboard, and a monitor to my 2025 MacBook Air (M4).
Before buying this I bought a complicated, powered hub for 2x the price and wasted multiple hours trying to get the $%^&(*& thing to work, which it never did. If you want to run a display and a few peripherals, this Startech hub is the absolute best bang for your buck.
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Reviewed in the United States on December 8, 2025
★★★★★ 1
Quality Control Issues
I want to like this dock, I really do. I purchased it with the intention of using it as a hub for my phone + usb-c external display.
The pass-through charging never worked on this dock. Tried multiple cords and tested the dock with nothing plugged into any of the USB ports -- all of the power disappears somewhere onto the hub and the actual charge rate on my phone slows to a trickle. With nothing connected, it estimates >24hrs to charge from 30% to full.
The plus side is that the usb ports do work, though the usb-c display went from 100% reliability to <50% within a few months of purchase. Extremely frustrating.
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Reviewed in the United States on September 24, 2024
★★★★★ 5
This is the one, buy it for DeX!
Looking for a compact USB hub to connect your laptop or Samsung DeX capable device? Buy this one!
I've tried multiple similar items from name brands, and they work fine as a USB and port hub, but this one is able to support power delivery and display data through a single (capable) USB-c cable. I assume because it is noted to be capable of some combo of USB 3.2, PD 3.0 pass through and DP 1.4 alt mode. I'm not quite sure which one(s) make it possible, but it works for an HP Spectre laptop and Galaxy phone.
Only improvement suggestion is to add an additional 10gb capable USB-C port in place of the three USB-A ports, but that's being super picky.
Thanks StarTech for building another unique solution for connectivity challenges.
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Reviewed in the United States on February 16, 2025
★★★★★ 2
Usb-c passthrough started failing about a year into ownership.
This had the potential to be the perfect accessory for my M4 MacBook Air. It is very difficult to find dongles like this that support display passthrough via usb-c (meaning that if you have a usb-c display you can connect it to this and use the display). When it did work, I was able to power a triple monitor setup with my 2 port Macbook Air (with one display being driven by a displaylink adapter).
If this product had continued to work as advertised, is would be a 5 star review.
But after maybe a year of VERY sporadic use (I use this maybe once a week because my MacBook Air is not often docked) the usb-c passthrough is already failing. On a display I use every day with a different machine (a 16" MBP that has enough ports to not need any adapters) and the display and cable work perfectly fine there so I can only assume that it is this specific adapter which is failing. If I insert the connector several times, sometimes I can get it to work but my success rate just keeps dropping. There was no other reason to spend this much on an adapter that without usb-c passthrough offers just 3 usb-a ports like most much cheaper adapters. So to say I am disappointed is an understatement.
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Reviewed in the United States on May 30, 2026