Code Definition

U0515 (87-68) — Invalid Data Received From Remote Function Actuation Module

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

About U0515

U0515 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.

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 U0515 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 Body Control Module and other networked modules exchange data with the Remote Function Actuation Module over the CAN bus to support remote locking, unlocking, alarm, and remote start functions where equipped. DTC U0515 sets when the receiving module detects that a valid CAN message from the RFAM is present but the data content is invalid, implausible, incorrectly formatted, or outside expected parameters. A failure type of 87 with a 68 qualifier reflects a data integrity or module processing fault rather than a complete communication loss. This is usually caused by an internal RFAM fault, ...

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