Code Definition

U2016 — Signal Link Short to Ground (Non SCP) / From NGV Module

System: Network Communication  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About U2016

U2016 is a generic (obd-ii standard) network communication diagnostic trouble code. It belongs to the U-prefix family of codes, which covers inter-module network communication (CAN, LIN, FlexRay, or similar) faults.

When U2016 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

Scanning & clearing: Network (U) codes report communication faults between modules. When diagnosing U-codes, checking the vehicle's CAN bus integrity, supply/ground at each module, and reading all modules for related faults is usually the first step.

Because U2016 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

This DTC indicates that a communication signal line on a non SCP network, typically CAN, LIN, or MOST, has been detected shorted to ground. The fault is reported by the NGV, or Next Generation Vehicle, module or an equivalent module that monitors the health of its network segment. A signal line pulled to ground drags the affected conductor low, which corrupts or halts messaging for every module sharing that line. Because a hard short to ground usually stops communication across the segment, the driver may see multiple warning lights and several modules reporting lost communication at the same ...

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