P0191 — OBD-II trouble code

A generic powertrain OBD-II trouble code. Below are the vehicles and failure patterns where owners report it, drawn from NHTSA complaints.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P0191 across 6 vehicle failure patterns. Diagnostic codes in complaints are reported by owners and are unverified — they point to where this code shows up, not a confirmed diagnosis. Open a page below for the full pattern (symptoms, mileage, repair costs owners cite).

Vehicles where owners report P0191 6 patterns

2022 Hyundai Tucson

powertrain — Sudden Power Loss / Loss of Acceleration

2021 Ford F-350

electrical — Engine shutdown and fuel system fault codes

2020 Kia Telluride

powertrain — Fuel System Failure – Loss of Acceleration

2019 Subaru Forester

powertrain — Thermal Control Valve Assembly (TCVA) / Engine Coolant Bypass Valve

2009 Volkswagen Jetta

engine — High-Pressure Fuel Pump (HPFP) Failure with Metal Debris

2009 Volkswagen Jetta

fuel system — High Pressure Fuel Pump (HPFP) Failure

Codes are pulled from what owners wrote in their NHTSA filings — they're allegations, not a shop diagnosis. Always confirm with a live scan. Browse all diagnostic codes →