Fuel Rail Pressure Sensor Circuit Range/Performance
4 articles · 1 makes affected
What is P0191?
P0191 indicates a problem with the fuel rail pressure sensor circuit, meaning the sensor's reading is outside its expected range or not performing correctly. This is a medium-severity powertrain issue that can affect engine performance and fuel delivery. Based on real data, this code is most frequently reported in Ford Mustangs, particularly 2020 models.
Common Causes
- ●Faulty fuel rail pressure sensor (most common replacement part)
- ●Wiring or connector issues in the sensor circuit
- ●Problems with the fuel pump or fuel pressure regulator
Symptoms You May Notice
- ●Check Engine Light is illuminated
- ●Engine performance issues like hesitation or stalling
- ●Reduced fuel efficiency
- ●Rough idling or difficulty starting
How to Fix It
- ●Replace the fuel rail pressure sensor ($150-$400, moderate difficulty)
- ●Repair or replace damaged wiring/connectors in the sensor circuit ($100-$300, moderate difficulty)
- ●Diagnose and repair underlying fuel system issues like a failing fuel pump ($500-$1000+, high difficulty)
Root Causesfor P0191
Based on 2 owner reports
What Didn't Help
Repairs that owners tried but didn't fix the issue
Things to Check
Suggested areas to investigate based on similar cases
Owner Statistics
Based on 200,865 real owner discussions • 5154 confirmed solutions
About This Data
Statistics are aggregated from real owner discussions on Reddit, automotive forums, and YouTube comments. All data is anonymized and represents actual repair experiences reported by vehicle owners.
Frequently Appears With
These codes often appear together in owner reports. Check these if you see P0191.
Based on analysis of 4 owner reports where multiple codes appeared together.