Rough-Running Passat: Faulty Fuel Pressure Sensor Alert

Had very similar symptoms with a 2015 VW Passat GTE hybrid. The rough idle and jerky acceleration pointed to an engine misfire caused by deteriorated fuel injector connections. Initial diagnosis suggested fuel pressure sensor, but the actual culprit was corroded wiring between the engine control unit and injectors. The repair involved testing each fuel injector connection and replacing damaged wiring harness sections. After fixing the connections, the fuel delivery system performed normally again. The engine misfire disappeared completely, and fuel economy improved noticeably. This type of issue should not be ignored as faulty fuel system connections can lead to more severe engine damage. The repair requires proper diagnostic equipment to pinpoint exact connection failures. A skilled technician needs to verify if the problem stems from the fuel pump, injectors, or related wiring. The check engine light and stalling symptoms match exactly what happened in my case. Would strongly recommend finding a shop specializing in VW hybrid systems for proper diagnosis, as general mechanics sometimes misdiagnose these specific connection issues.

Thanks for sharing your experience. Really helpful to know about those injector connections, seems like we have the exact same symptoms. Just had it checked and youre right about needing specialized diagnosis. Did you remember roughly how much the repair cost in your case? Also curious if youve had any recurring issues with the fuel delivery system since the fix?

Thanks for asking about the costs. After seeing the mechanic, they confirmed and fixed the defective fuel pressure sensor, which turned out to be a faulty cable connection. The total repair came to 95€ for parts and labor, which was actually less than initially expected. Since fixing the connection, the fuel system has been working flawlessly. The rough idle completely disappeared, and the engine runs smooth as new. Fuel economy even improved slightly after the repair, which was a nice bonus. The check engine light hasnt come back on, and the car performs perfectly during acceleration. The key was having a proper diagnostic test done by a shop familiar with hybrid systems. They quickly identified the exact issue with the fuel pressure sensor connection rather than replacing parts unnecessarily. Going on 8 months now with zero recurring problems with the fuel pump or any other fuel system components. The reasonable repair cost and complete resolution of symptoms suggests you might be dealing with a similar straightforward fix. Just make sure whoever does the work can properly test the entire fuel delivery system, not just swap parts.

I wanted to follow up and share how my repair situation turned out. After reading about the injector connections, I found a certified hybrid specialist who actually had experience with these exact symptoms. The diagnostic testing showed failed wiring connections at two fuel injectors, just like mentioned. Total repair cost was 280€ for replacing the damaged wiring harness sections and testing the fuel delivery system. The fuel pressure sensor thankfully turned out to be fine. The repair completely fixed the rough idle and jerky acceleration. No more stalling issues and the check engine light finally stayed off. The car runs perfectly smooth now, especially during cold starts when the problems used to be worst. Really glad I got a second opinion instead of going back to my regular mechanic. The specialist knew exactly what to look for in the fuel system and fixed it right the first time. No issues at all in the three weeks since the repair. Big thanks for pointing me in the right direction with the injector connection suggestion. Saved me from potentially getting unnecessary parts replaced.