Hyundai Technical Service Bulletin – DTC P1327 Engine Replacement for 2019-2021 Elantra, Kona, and Veloster

Service Campaign 974

This service campaign is to enhance the knock sensor logic with the Cylinder Noise Diagnostic System (CNDS) software update.

The CNDS software update will detect abnormal cylinder wall scuffing or noise of the engine block before potentially severe engine damage occurs.

Affected Vehicles

Certain 2019-2021 Elantra (AD), Kona (OS), and Veloster (JS) vehicles with 2.0L Nu engines.

Service Procedure

Check ROM ID and scan for DTCs, and submit a Prior Approval (PA) for engine replacement if DTC P1327 is present.

Replace the engine following standard HMA warranty policy and use a new engine long block if the vehicle is within 5/60 and a Reman when beyond 5/60 (if available).

Update the engine ECM with new software if available, clear any DTCs, and reset adaptive values with Key On Engine Off (KOEO).

Manual:

Download: Hyundai Technical Service Bulletin – DTC P1327 Engine Replacement for 2019-2021 Elantra, Kona, and Veloster

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