P0191 on Alfa Romeo: How to Diagnose & Fix
Fuel Rail Pressure Sensor Circuit Range/Performance
2 Alfa Romeo models · 2 documented issues · 2 critical · $200-$2,000 repair
P0191 on Alfa Romeo by model: symptoms, diagnosis and fix
2017-2019 Giulias can experience sudden engine stall or no-start due to a defective low-pressure fuel pump inside the fuel delivery module. Internal components of the module are susceptible to heat, causing a loss of fuel flow that can starve the engine at any speed. NHTSA recall 25V-586 (Stellantis campaign 93C) covers free replacement. Symptoms include stalling at idle, no-start hot, and intermittent fuel pump prime noise from the rear of the vehicle.
Common Symptoms
- Engine stalls while driving
- No-start condition
- Check engine light
- Loss of drive power
How to Fix
Check the VIN for open recall 25V-586 (FCA 93C). Dealers replace the fuel delivery module free of charge with an updated unit that has improved design and tolerances and an updated Pump Electronic Module. Interim owner letters were scheduled for late October 2025; confirm parts availability with the dealer. The cost range shown applies only to repairs done outside the recall.
Sources for this issue (2)
2018-2019 Stelvios can experience sudden engine stall or no-start due to a defective low-pressure fuel pump inside the fuel delivery module — same defect as the Giulia, same supplier, same NHTSA timeline. Internal components of the fuel delivery module are susceptible to heat, causing a loss of fuel flow rate that can starve the engine at any speed. NHTSA recall 25V-586 (FCA campaign 93C) covers free replacement of the fuel delivery module. Stalls reported at highway speed make this safety-critical until repaired.
Common Symptoms
- Engine stalls at speed
- Intermittent no-start
- Dashboard warning light cluster
- Power loss while driving
How to Fix
Check the VIN for open recall 25V-586 (FCA campaign 93C) at an Alfa Romeo dealer or on NHTSA.gov. Dealers will replace the fuel delivery module free of charge; interim owner letters went out in October 2025 and the final remedy was anticipated for July 2026, so ask the dealer whether parts are available yet.
Sources for this issue (3)
P0191 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0191 mean on a Alfa Romeo?
P0191 stands for "Fuel Rail Pressure Sensor Circuit Range/Performance." This code sets when the fuel rail pressure sensor's signal is out of its expected range or doesn't match what the computer expects for current conditions. On direct-injection and many modern engines, this sensor reports fuel pressure in the rail so the computer can precisely control fueling and the fuel pump. When the reading is implausible — too steady, erratic, or inconsistent with commanded pressure — this code is set, sometimes with hard starting, hesitation, or reduced power. It generally points to the sensor or its wiring, though an actual fuel-pressure problem can also trigger it. On Alfa Romeo it is documented across 2 models: Giulia, Stelvio.
What are the most common causes of P0191?
The most common causes of P0191 are: Faulty fuel rail pressure sensor, Corroded, loose, or damaged sensor connector, Open, shorted, or high-resistance sensor wiring, Actual fuel pressure out of range (weak pump or regulator), Restricted fuel filter or supply line, Loss of reference voltage or ground from the ECM/PCM, Faulty fuel pressure regulator or control valve. The specific cause varies by vehicle.
How much does it cost to fix P0191 on a Alfa Romeo?
Published repair estimates on Alfa Romeo range from $200 to $2,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.