Hyundai Sonata Hybrid 2016–2017 — technical service bulletin
Bulletin 20-01-003H · NHTSA communication 10170894 · issued Jan 16, 2020
Technical service bulletin
communication type
Electrical System
component
2016–2017
model years
2
vehicle entries
Official summary
2016 - 2017 model year Sonata LF HEV vehicles contain a Power Relay Assembly. The PRA is equipped with a main relay and High Voltage Cable, which in some instances may have a loose connection. If the vehicle continues to operate in this condition, a loose connection could cause a no start condition or a Check Engine and Hybrid Warning Light On with either or both of these DTCs stored: DTC P1B77 High Voltage Battery Precharging Fault DTC P1990 Oil Pump Unit Input High Voltage Wiring Line Open This bulletin describes the procedure to inspect the PRA, High Voltage Cable, and main relays and repla
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.