Code Definition

U010A — Lost Communication With Exhaust Gas Recirculation Control Module A

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

About U010A

U010A is a generic (obd-ii standard) network communication diagnostic trouble code recorded for Isuzu 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 U010A 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 Powertrain Control Module (PCM) expects to receive periodic communication from the Exhaust Gas Recirculation (EGR) Control Module A over the vehicle communication network, usually the CAN bus. U010A is logged when the PCM detects that messages from the EGR Control Module A have ceased for a defined timeout period, indicating a loss of communication, typically with the ignition ON or the engine running when the PCM fails to see valid EGR module messages on the network. With the code set the PCM disables EGR operation and illuminates the check engine lamp, related EGR performance codes may a...

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