Code Definition

U0127 — Lost Communication With Tyre Pressure Monitor Module

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

About U0127

U0127 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 U0127 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 Tyre Pressure Monitor Module receives pressure data from the wheel mounted sensors and reports tyre pressures and system status to the Body Control Module or instrument cluster over the CAN data network. DTC U0127 is a generic network code set when a receiving module stops receiving valid CAN messages from the Tyre Pressure Monitor Module for a calibrated period while the ignition is on and the rest of the network is communicating. The fault usually means the TPMS module has gone offline due to loss of power or ground, a CAN wiring fault, or an internal failure. When this code is active th...

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