P0088 on Hyundai vehicles Fuel rail pressure is above what the system commanded

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Bulletins and campaigns Hyundai filed with NHTSA whose summary names P0088. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• 25-FL-002H TSB Warranty extension
  2025-02-05 · Fuel/Propulsion System
• Certain 2019-2022MY Veloster N (JSN), 2022-2023MY Elantra N (CN7N), and 2022-2023MY Kona N (OSN) vehicles are equipped with high pressure fuel pump (HPFP) assemblies that have fuel control valves (FCV) that could allow excess fuel to enter the fuel pump due to gradual wear of the FCV plunger. An air/fuel mixture that runs too “rich” may result in a reduction or loss of motive power at low speeds.
• 25-FL-002H OL Warranty extension
  2025-03-03 · Fuel/Propulsion System
• Certain 2019 - 2022 model year Veloster N, 2022 - 2023 model year Elantra N, and 2022 - 2023 model year Kona N vehicles may have a Fuel Control Valve (FCV) in the High-Pressure Fuel Pump (HPFP) assemblies that could allow excess fuel to enter the fuel pump. This condition may result in a reduction or loss of motive power at low speeds. The vehicle will also have Diagnostic Trouble Code (DTC) P0088

A stored code names the test that failed, never the part that caused it. The record above is what Hyundai and its owners have filed about it; the code’s page across every make has the whole file.