Rough idle or hard start when cold on Hyundai Genesis

Submitted by Jim Taddei · May 29, 2025
Published by RepairPal

Problem overview

A rough idle or hard starting condition may develop, most noticeable when the engine is cold, with fault code P161B stored in the powertrain control module (PCM). Our technicians tell us that a PCM software upgrade is available to correct this concern.

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