OBD ENGINE CHECK LIGHT MODULE

RAZOR OBD ENGINE CHECK LIGHT MODULE

Upgraded to catless downpipes? or changed to sport cats , deleted OPF filter? - without adjusting the main ECU software - the known issue appears : Engine Check light on the dashboard. 

IMPORTANT: Some engine control units (ECUs) do NOT support clearing fault codes while driving. In this case, the product is not suitable for this vehicle.

How to Test:

Start the engine → Connect the diagnostic tool → Clear the fault codes with the engine running.

If the fault codes can be cleared with the engine running → the tool works.

If not → it doesn't work.

It blocks the fault memory for codes such as P0401 (EGR), P0420 (catalytic converter), P0234 (turbocharger), etc.

The OBD CEL delete module is ideal for all sporadic, emissions-related fault codes such as P0400, P0401, P0402, P0403, P0404, P0405, P0406, P0407, and P0408 (exhaust gas recirculation). This differs from the fault code class related to the catalytic converter (P0420, P0421, P0422, P0423, P0424, P0430, P0431, P0432, P0433, and P0434). In cases of performance upgrades or unresolved turbocharger problems, the fault code P0234 frequently occurs: boost pressure control limit exceeded. It can also be used in motorsports, for example, to remove the OPF/GPF (OPF/GPF delete).

This module is for customers who have their downpipes upgraded from stock, with restrictive catalic converters, to sport cats for example 100 or 200 cell or installed catless downpipes or deleted their fuel or emission filters.

The common issue after such an upgrade is that the engine check light appears due to different calculated values by the ECU.

This module fixes that issue without having to upgrade to expensive ECU software which might also void any car warranties.

While driving, the RAZOR OBD Tectronic module monitors the engine control unit in real time for emission fault codes.

OBD stands for "On-Board-Diagnostics", which is the diagnostic port of your vehicle. The OBD-Module is a compact electronic module that is simply plugged into this diagnostic port. There it monitors the fault memory of the engine control unit in real time for possible entries. If a pending fault code is detected the OBD-Module blocks it even before the driver can see a message in the dashboard.

The module intercepts only emission related fault codes , therefore the full functionality of the fault memory and engine control light is retained for all other fault messages.

Some engine control units do not support the clearing of fault codes with the OBD protocol while driving. The OBD module is then not suitable for these vehicles. Please check with us car compatibility before ordering.

The Razor OBD Module is available for most models including vehicles like Ferrari, Lamborghini, McLaren, Porsche and Corvette and selected others.

How it works 
"OBD" stands for "On-Board Diagnostics," the standardized diagnostic interface for motor vehicles. The OBD Module is a compact electronic module that simply plugs into this diagnostic interface. There, it monitors the engine control unit's fault memory in real time for potential entries. If a pending fault is detected in the memory, the OBD Module blocks it before the driver sees a message on the dashboard. Expected, sporadically occurring fault codes can thus be isolated. If an unexpected fault occurs, the clearing process stops. This preserves the functionality of the fault memory.

Error codes
The Module is self-learning and can generally block all emissions-related fault codes. During installation, the module  learns the stored codes as expected faults. This process can be repeated as often as needed to add further fault codes. Manufacturer-specific codes that do not conform to the OBD standard are also deleted. The Module ceases to intervene as soon as an unexpected fault occurs. Thus, the full functionality of the fault memory and check engine light remains intact for all other fault messages.

Application
The OBD module can be used on vehicles as early as 2008 models onwards that comply with the European EOBD standard or implement it accordingly. There are also vehicles from earlier years that support the necessary standard. You can identify these vehicles by the fact that pins 6 and 14 of the diagnostic port are occupied. It doesn't matter whether the engine runs on diesel, gasoline, natural gas, or LPG. 

Some engine control units do NOT support clearing fault codes while driving using the OBD protocol. The OBD module is not suitable for these vehicles. Please check this before ordering.

Assembly
The OBD module is simply plugged into the vehicle's OBD port.

Troubleshooting & Common Problems
If the OBD module isn't working as expected, here you'll find the most common causes and solutions.

Quick check (solves most cases):
Compatibility (Year of manufacture / OBD pins 6 & 14)
Repeat the installation correctly (learn new error codes)
On-board voltage (minimum 13.2 V while driving)
Check LED behavior (yellow/red)
OBD doesn't erase data – is my vehicle compatible?
The OBD can be used in vehicles from model year 2008 onwards . Earlier vehicles may also work if pins 6 and 14 of the diagnostic port are occupied.

The warning message keeps appearing – why do I have to repeat the installation multiple times?
Vehicles with technical modifications can often have several different fault codes stored in the control unit. These faults sometimes occur at different times . Therefore, warning messages may disappear after being cleared and then reappear later.

In such cases, it is necessary to use the OBD module multiple times :

Remove OBD module
Wait approximately 10 seconds .
Plug the OBD back in
Repeat until no new errors are displayed.
The OBD  processes the error codes step by step and permanently stores them in the internal memory, so they should not reappear in the long term.

The OBD doesn't seem to be activating – what's the deal with the 13.2V?
The OBD only activates when the vehicle's electrical system voltage reaches at least 13.2 volts while driving . Ideally, measure the voltage directly at the vehicle battery.

Short trips / weak battery / alternator: voltage may remain too low.
Test again after a few minutes of driving (when the alternator is charging).
What do the LEDs (yellow/red) mean?
Yellow LEDs : Flashing depending on engine speed – this indicates communication with the engine control unit.

Red LED briefly illuminates: An attempt to delete the error codes was made.

Red LED permanently lit (flashing/illuminated): It is not possible to clear fault codes while driving this vehicle .

What information should I send you if I need support?
To enable us to help quickly, please send:

Vehicle model + year of manufacture
Engine
Which error codes are present (e.g. P0401 / P0420 etc.)
LED behavior (yellow/red) + whether at least 13.2 V is present during driving.
Engine warning light after modifications such as OPF delete, downpipe or sports exhaust?
After technical modifications to the exhaust system – e.g. , OPF/GPF deletion , downpipe conversions , catalytic converter replacement or sports exhaust systems – sporadic error messages often occur in the engine control unit.

Typical error codes include P0420 (catalytic converter efficiency), P0430 , EGR-related errors, and emissions-related manufacturer codes. These errors often do not occur continuously , but rather intermittently or only under specific driving conditions.

The OBD is designed precisely for such sporadic, emissions-related faults . It learns the existing fault codes during installation and then automatically monitors the engine control unit while driving.

Important: The OBD does not replace repairs and does not interfere with the engine control unit. It is only suitable for vehicles where technical modifications or aging processes lead to recurring, sporadic error messages .