Hyundai Sonata 2015–2019 — technical service bulletin
Bulletin 23-FL-004H · NHTSA communication 10238401 · issued Jun 29, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2015–2019
model years
5
vehicle entries
Official summary
Certain 2015-2019MY Sonata (LFA) vehicles may intermittently exhibit reduced engine power, a â Crank/No Startâ condition, and/or have DTC P1233 stored in the ECM due to an internally leaking fuel pump filter housing. Hyundai is extending warranty coverage for fuel pump filter assembly repair or replacement to 15 years / 150,000 miles from the date of original retail delivery or date of first use (whichever occurs first) and is valid for original and subsequent owners. Follow the service procedure to inspect the low-pressure fuel pump operation and replace the fuel filter if necessary.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.