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Service bulletin 5NP-X4Q7Y-01

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10127010
Published by NHTSA2018-01-16
Manufacturer's number5NP-X4Q7Y-01
Manufacturer's date2017-12-21
NHTSA componentHYBRID PROPULSION SYSTEM

NHTSA's summary

Some 2016-2017MY Sonata Plug-In Hybrid vehicles may develop a Check Hybrid System Light On with the DTC P1BA7 DTC found stored in the Battery Management System (BMS).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Hybrid and electric drive

Trouble codes named

P1BA7

Vehicles listed
HYUNDAI SONATA2016, 2017

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
18V1660002018-03-12. HYBRID PROPULSION SYSTEM

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
5NP-U6Y5P-012018-01-16. Service bulletin. Some 2017MY SONATA HYBRID (LF HEV) and Plug-In Hybrid (LF PHEV) vehicles may develop an abnormal noise, Hybrid/Check Engine Warning Light On and/or Engine No Start if the pulley becomes loose at the Hybrid Starter Generator (HSG) shaft.
5NP-U2Z6J-082017-08-15. Service bulletin. Some 2017MY SONATA HYBRID vehicles may develop an abnormal noise, Hybrid/Check Engine Warning Light On and/or Engine No Start if the pulley becomes loose at the Hybrid Starter Generator (HSG) shaft.