This unit was sent to me to review with my honest opinion and results below.
The Launch CReader 4001 is a basic OBD2 automotive scan tool for reading and clearing check engine light codes.
It is aimed at the home DIY backyard mechanic who needs a low-cost handheld that plugs in and shows what the powertrain computer is complaining about.
What Does the Launch CReader 4001 Do?
OBDII ports showed up on most cars and light trucks built for the U.S. market in 1996 and newer. European OBD2/EOBD coverage is generally 2001 and newer. The port is usually under the driver side dash.
The CReader 4001 talks to the engine computer (ECM/PCM) over that port. If a fault is stored, it returns a DTC so you know where to start.
It is an engine / powertrain OBD2 reader only. It does not do ABS, SRS airbag, or other body modules. For those you need a bigger scan tool.
- Read and clear current, pending, and permanent DTCs
- Turn off the MIL (check engine light) after codes are cleared
- Live data stream and freeze frame
- I/M readiness for emissions monitors
- Vehicle info (VIN and related data)
- Built-in DTC lookup on the 2.4 inch color screen
No batteries are needed. It powers itself from the OBDII port once you plug in the 16-pin cable and turn the key to ON.
What Does a Code Look Like on the Screen?
For example, here it shows a P0327 knock sensor circuit code. That can be a bad sensor, a wiring problem, or a connector issue. The code points you at the circuit so you are not guessing.
The main job of any beginner OBD2 scanner is to explain why the check engine light is on, or help when a no-start has left a stored code.
From the diagnose menu you can read codes, erase codes, check I/M readiness, pull data stream, run on-board monitors, and read vehicle information.
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Launch CReader 4001 OBD2 Diagnostic Scan Tool for Check Engine Light
Summary
The Launch CReader 4001 is still a solid beginner scan tool for the money when you can find one in stock. It does what it is built for: scan engine codes, show freeze frame and live data, check readiness, and clear the light after a repair.
Some mechanical know-how still helps once you have the code. Forums and YouTube videos make a big difference on common DTCs.
If you need to know why an engine light is on, this unit covers most 1996-and-newer OBD2 cars and light trucks, foreign or domestic. Clearing codes will turn the light off, but it will come back until the real problem is fixed.
will this work on my Toyota Landcruiser 1999 VX100 4.7 Petrol? The only interface that could work up to date is the Toyota Techstream TIS and I want to find a handheld that can do my DTC’s?