Introduction
An OE-level scan tool will allow access to all the vehicle control modules on a vehicle, providing all the advanced diagnostic functions, such as live data, active tests, coding or adaptations where necessary.
The basic OBD2 scanner will typically identify any faults with the engines and emissions related systems on the vehicle. However, the coverage of systems will be limited and there will be no chance to fully diagnose more complex vehicles. This is very different to an OE level tool, which can access more vehicle systems depending upon the make, model, software and tool being used.
What Is an OBD2 Scanner?
An OBD2 scanner connects to the vehicle through its OBD-II port. Most basic scanners focus on emissions-related problems.
Common functions include:
- Reading and clearing generic OBD-II codes
- Viewing engine live data
- Checking freeze-frame data
- Monitoring OBD-II readiness
- Checking emissions-related faults
For basic check engine light troubleshooting, these functions are usually enough.
Most OBD2 scan tools are unable to connect to other systems of the vehicle, i.e. manufacturer specific systems like ABS, SRS, TCM etc. Depending on the functionality of the OBD2 scan tool, it may also not have any of the following functions: active tests, coding, adaptations.
In short, an OBD2 scanner works well for basic check engine light diagnostics, while an OE-level scan tool provides deeper access to individual vehicle systems.
What Is an OE-Level Scan Tool?
An OE-level scan tool goes beyond the standard engine data retrieved by basic scan tools. It communicates with additional control modules throughout the vehicle.
These may include:
- Engine control module (ECM)
- Transmission control module (TCM)
- ABS
- SRS/airbag
- Body control module (BCM)
- HVAC
- Steering
- ADAS-related systems
These very advanced diagnosis test units can also perform bi-directional tests, ECU coding, special adaptations and a host of other unique service functions on specific vehicles.
However, “OE-level” does not necessarily mean the tool is identical to the manufacturer’s diagnostics. The coverage and functionality of the tool may vary from vehicle, to software release, and from tool to tool.
OE-Level Scan Tool vs OBD2 Scanner
The main difference is the depth of vehicle access.
Note: The actual coverage of the diagnostic functions provided by a device will depend on the vehicle, the software version and the diagnostic tool used.
Most OE-level scan tools are able to read generic fault codes with an OBD2 scanner but allow the technician to inspect multiple vehicle systems, run diagnostics and more during a single repair.
What Can an OE-Level Scan Tool Diagnose?
Engine and Transmission
An OE level tools can also retrieve Manufacturer specific information such as Powertrain codes, as well as info from Transmission Control Modules etc. as well as live data parameters etc.
Using an OE-level tool can help diagnose a problem when the generic code does not provide enough information to diagnose the problem.
ABS and SRS
Most Warning Lights for ABS and airbag systems are controlled by separate control modules for these functions.
Full-system access enables a scan tool to communicate with the ABS and airbag system control modules and to retrieve diagnostic information for supported vehicles.
Body and Comfort Systems
Modern vehicles rely on many body-control modules.
Depending on vehicle coverage, an OE-level scanner may access:
- BCM
- HVAC
- Door modules
- Lighting systems
- Steering systems
Importantly, faults in these systems may not trigger a check engine light.
Advanced Vehicle Systems
Modern vehicles also use more complex electronic architectures and communication networks.
Therefore, the newer diagnostic programs support the communication technologies CAN FD and DoIP for current vehicle architectures.
Some tools may also offer security gateway access for certain diagnostic functions on certain vehicles.
Why Is an OE-Level Scan Tool Useful for Modern Vehicles?
There are many more electronic systems than in the past, and one single fault can cause problems with communication between several modules.
This diagnostic warning could indicate a problem with the engine however the Technician may also require access to transmission data or communication between control modules as part of the diagnosis.
Basic code readers can identify the first fault but a more advanced scan tool will provide more information and can even perform active tests on supported vehicles to help diagnose the problem more thoroughly before ordering parts.
When Do You Need an OE-Level Scan Tool?
You may need deeper diagnostic access when:
- An ABS or SRS warning appears
- A transmission fault requires module-level diagnosis
- A vehicle has multiple communication faults
- A component replacement requires a relearn or adaptation
- An ECU or other module needs coding
- An active test is needed to verify a component
- Basic OBD-II data does not explain the problem
For a simple check engine light, a basic OBD2 scanner may be enough.
For professional repair work, the required diagnostic depth depends on the vehicle and the job.
What Should You Look for in an OE-Level Scan Tool?
Selecting an OE-level scan tool is not just for selecting a tool that supports the most vehicle makes.
Vehicle Coverage
Check what actual makes, models, systems and model years are covered by a scan tool.
Diagnostic Functions
Typically, these functions are the same as you use on a daily basis for repair work: full-system scanning, live data, active tests, coding, adaptations and service resets.
Communication Protocols
For newer vehicles newer technologies such as CAN FD and DoIP are increasingly introduced.
Software Updates
Modern Vehicle systems are rapidly changing with frequent software updates, which can impact the breadth of diagnostic coverage and functions supported.
Workshop Workflow
A wireless VCI, AutoVIN, diagnostic reports and clear workshop interface also increase efficiency in daily workshop use.
OE-Level Scan Tool or OBD2 Scanner: Which One Do You Need?
OBD2 scanners are generally suited for generic fault-code checking whereas an OE-level scan tool will allow more comprehensive access to a vehicle’s control modules as well as additional functions.
For example, the full-system diagnostic tools by UDIAG for workshops are the X-50, X-60 and X-95 Pro models. While the X-50 is equipped with the full-system diagnostics and various service functions, the X-60 in addition to the aforementioned functions also offers active tests, ECU coding, CAN FD and DoIP diagnostics on suitable vehicles. The X-95 Pro offers even more advanced diagnostic functions including bi-directional tests, ECU coding, online programming, CAN FD, DoIP and J2534 diagnostics on suitable vehicles.
Ultimately, the tool you select must align with the vehicles you service as well as the various functions you require to perform diagnostic work. It’s wise to research current vehicle coverage and required functions for specific models prior to your making a purchase.