Code Definition

U016A — Lost Communication With Global Positioning System Module

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

About U016A

U016A is a generic (obd-ii standard) network communication diagnostic trouble code recorded for Ford vehicles. It belongs to the U-prefix family of codes, which covers inter-module network communication (CAN, LIN, FlexRay, or similar) faults.

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 U016A 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

The Audio Control Module (ACM), Body Control Module (BCM), or Telematics Control Unit communicates with the Global Positioning System (GPS) module over the Controller Area Network (CAN) to obtain vehicle position and navigation data. DTC U016A is set when valid CAN messages from the GPS module are not received within a calibrated time while the ignition is in the RUN position. This indicates a loss of network communication or a power or ground failure preventing the GPS module from participating on the CAN network.

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