Subaru Exiga Stalling: Rail Pressure Sensor Alert

Since I had a similar issue with my 2016 Subaru Legacy with the same engine series, I can share my experience. The symptoms match exactly what I encountered, engine stalling at idle and inconsistent power delivery. The check engine light was flashing, and the sensor signal from the fuel rail was erratic. After trying basic fixes like cleaning connections, my regular workshop diagnosed a faulty pressure sensor using diagnostic equipment. The total repair cost was 240€, which included: New pressure sensor, Installation, System testing, Diagnostic fees After replacement, the engine performance returned to normal, and the stalling issue disappeared completely. The repair took about 2 hours. To help further with your specific case, could you share: current mileage on your Exiga, whether the issue occurs more when the engine is cold or warm, any recent fuel system maintenance, Scan tool codes if you have them This information would help determine if your issue is identical to what I experienced with my Legacy. A professional diagnosis is recommended since fuel rail issues can sometimes be confused with other sensor failures that show similar symptoms.

Thanks for sharing your experience. My Exiga currently has 169283 KM and the last major service was done 3 months ago. The issue definitely gets worse when the engine is warm. The fuel injection behavior seems most erratic after about 15 minutes of driving. I checked the codes with a basic scanner and got P0193, which points to the fuel rail pressure sensor as suspected. The symptoms you described with your Legacy match mine exactly. Will schedule an appointment to have the fuel pressure properly tested. Hopefully its just the sensor and not the entire fuel rail assembly that needs replacement. Appreciate the cost breakdown, helps set expectations for the repair budget.

Thanks for providing those details. When my Legacy had the same issue, the symptoms also intensified when warm, exactly like yours. The P0193 code matches what I got, confirming the rail pressure sensor signal problem. The warm engine correlation is typical for pressure sensor failures. In my case, the erratic sensor signal caused the engine performance to fluctuate more as operating temperature increased. Once properly diagnosed, replacing just the sensor fixed it, no need for a complete rail assembly replacement. Since your mileage is close to what mine was (I was at 172000 KM), and you're getting identical symptoms and codes, I'm fairly confident you're dealing with the same issue. The 240€ repair cost I mentioned earlier should be pretty accurate for your situation. One suggestion based on my experience: have them check the wiring harness connections while they're replacing the sensor. My mechanic found slight corrosion on the connectors, which they cleaned during the repair to prevent future signal issues.

Thanks everyone for the helpful replies. Just wanted to update that I got the car checked today, and you were all spot on. The fuel rail pressure sensor was indeed the culprit. The mechanic confirmed the erratic sensor signal was causing the fuel injection system to malfunction. Final repair cost came to 255€, slightly more than expected but included a full fuel system inspection. They also cleaned the electrical connections to the pressure sensor as suggested. The whole job took about 2.5 hours. The car runs perfectly now, no more stalling, steady idle, and power delivery is back to normal. My fuel pressure readings are now consistently within spec. For anyone facing similar symptoms, definitely worth checking the rail sensor first before assuming larger fuel system problems. Good to know this is a common issue at this mileage. Will make sure to include fuel system checks in future maintenance schedules.