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+ Giulias can experience sudden engine stall or no-start due to a defective low-pressure fuel pump inside the fuel delivery module. The pump's internal commutator wears prematurely and loses contact, cutting fuel supply 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. Failures cluster at 30,000-80,000 miles.
Common Symptoms
- Engine stalls while driving
- No-start condition
- Multiple warning lights
- Loss of electrical power
How to Fix
Have the ECM and wiring harness inspected at an Alfa Romeo dealer. FCA has issued TSB 18-024-17 REV.A addressing the wiring harness routing. ECM replacement with updated software may be required.
Sources for this issue (1)
2018+ 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. The pump's internal commutator wears prematurely and loses contact, cutting fuel supply at any speed. NHTSA recall 25V-667 (Stellantis campaign 93C) covers free replacement. Failures cluster at 30,000-80,000 miles; 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
Inspect and repair the ECM harness per FCA TSB 18-024-17 REV.A. Clean and reseal all engine bay ground points. ECM replacement with updated calibration may be needed for persistent cases.
Sources for this issue (1)
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.
Looking for P0191 on a different make?
View P0191 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.