P0191 on BMW: How to Diagnose & Fix
Fuel Rail Pressure Sensor Circuit Range/Performance
1 BMW model · 1 documented issue · 1 critical · $600-$1,500 repair
P0191 on BMW by model: symptoms, diagnosis and fix
The B58 engine's high-pressure fuel pump can fail, though at lower rates than the older N54 engine. When the HPFP fails, fuel pressure drops below the minimum required for proper direct injection, causing long cranking, rough idle, misfires, and in severe cases, the engine stalling and entering limp mode. Failures are more common in cold weather when fuel demands are higher, and can be exacerbated by ethanol-blended fuels.
Common Symptoms
- Long cranking before engine starts, especially in cold weather
- Engine stalling at idle or low speed
- Check engine light with fuel pressure codes
- Noticeable loss of power during acceleration
- Rough idle and misfires
How to Fix
Replace the high-pressure fuel pump with the latest revised BMW part number. Verify the low-pressure fuel pump is providing adequate feed pressure. Use top-tier fuel and avoid running the tank below 1/4 to reduce strain on the fuel system. If under warranty, BMW will cover HPFP replacement.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Bosch B58 high-pressure fuel-pump kit 13518631642KTCross-refKIT-13518631642KT, 13518631642
Confirmed failed engine-driven high-pressure fuel-pump replacement. Fitment: 2020-2024 G20 M340i/M340i xDrive where FCP vehicle validation and VIN confirm BMW pump 13518631642; not the in-tank fuel-supply module..
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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 BMW?
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 BMW it is documented across 1 model: M340i.
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 BMW?
Published repair estimates on BMW range from $600 to $1,500 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.