Hyundai Technical Service Bulletin – DTC P1327 Engine Replacement for 2019-2021MY Elantra (AD), Kona (OS), and Veloster (JS)

Service Campaign 974

This service campaign aims to enhance the knock sensor logic with the Cylinder Noise Diagnostic System (CNDS) software update to detect abnormal cylinder wall scuffing or noise of the engine block before potentially severe engine damage occurs.

Applicable Vehicles

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

Service Procedure

Check ROM ID and scan for DTCs, and if DTC P1327 is present, submit PA for engine replacement. Follow the published Service Information from the applicable Shop Manual to remove and replace the Engine Assembly.

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

Manual:

Download: Hyundai Technical Service Bulletin – DTC P1327 Engine Replacement for 2019-2021MY Elantra (AD), Kona (OS), and Veloster (JS)

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