CELsync is a discreet, compact Onboard Diagnostic electronic module crafted to elevate the diagnostic functionalities of motor vehicles. Conveniently plugged into the OBD port, it actively monitors the fault memory of the engine control unit in real-time. By detecting and proactively blocking only specific exhaust modification-related pending fault codes, CELsync ensures that drivers avoid receiving dashboard notifications CEL codes such as P0401 (EGR), P0420 (catalytic converter), P0234 (turbocharger), and more.


**Step 1: Locate the OBD Port – The OBD Port is most commonly located under the dash on the driver side under the steering wheel.

**Step 2: Plug in CELsync – Plug the CELsync device into the OBD Port.

During the initial installation, it is crucial that the expected fault codes are active, and the Check Engine Light/CEL indicator is illuminated. This ensures accurate communication between CELsync and the engine control unit.

**Step 3: Device Activation – Upon starting the engine, the CELsync device will initiate within 60 seconds or shortly after driving away. Keep an eye on the CELsync it will light up the yellow LED, as it will flash in correspondence with the engine speed, indicating successful communication with the engine control unit. As a side note, in certain vehicles, it may be advisable to use the optional flat extension cable for practicality and a more stealth installation
and or easier viewing.

Upon the initial engine start, CELsync efficiently stores all currently active error codes in its internal memory. This automatic process ensures a comprehensive record of the vehicle’s diagnostics. This process can be repeated by briefly disconnecting and plugging in the CELsync in order to store a new set of codes.

**Step 4: Red LED Indicators for Deletion Status

– Brief Red LED Illumination: Indicates successful deletion of an expected error code.

– Continuous Red LED Flashing: Denotes denial of deletion by the engine control unit in the current operating state. The deletion process continues until the engine control unit confirms successful deletion.

– Persistent Denial: In rare cases where constant deletion is refused, it may signal a permanent fault or lack of support for fault code clearing while the engine is running.

**Step 5: Post-Engine Stop Procedures – Following engine shutdown, the green LED will flash every 5 seconds, signifying CELsync’s ongoing monitoring. This periodic check ensures awareness of any engine restart, facilitating a seamless diagnostic process.


**What does CELsync do?**
CELsync continuously monitors the fault code memory of the engine control unit. Upon identifying a fault code, it intervenes promptly, eliminating the pending fault code before it becomes permanently stored. Even if a fault code existed before CELsync installation, it takes corrective action to remove it.

**For which vehicles is CELsync compatible?**
Programmed specifically for each model by our engineers, CELsync is compatible with all vehicles from model year 2008. Some earlier models may also be supported if they comply with the necessary standard, identifiable by the connection of pin 6 and pin 14 to the diagnostic port. Fuel type (diesel, gasoline, natural gas, or LPG) is irrelevant. However, for vehicles with engine control units that do not support clearing fault codes while driving, CELsync may not be suitable.

**Which fault codes does CELsync address?**
Adaptable and versatile, CELsync can generally block all emission-related fault codes. During installation, it learns and recognizes stored fault codes as expected ones, and this learning process can be repeated as needed. It effectively addresses common errors such as P0401 (related to coked EGR valves) and P0420 (common in aged catalytic converters). Additionally, it deletes manufacturer-specific codes that do not adhere to the diagnostic standard.

CELsync is frequently used to clear sporadic fault codes that may arise after an OPF-removal (Otto-Particulate-Filter) or cat-removal (catalytic converter). In the event of an unexpected fault code, CELsync refrains from intervention, allowing the full functionality of the fault memory and engine control light for other fault messages.

*Intended for off-road use and race applications