VW Caddy Stalling: Bad Fuel Pressure Sensor Alert

I faced nearly identical symptoms with my 2012 VW Jetta TSI. The check engine light came on, accompanied by rough idling and engine stalling during acceleration. After thorough diagnostics, it turned out the fuel pressure sensor had corroded connectors, disrupting proper fuel delivery to the engine. The repair involved replacing the complete fuel pressure sensor assembly and cleaning the connected wiring harness. This was actually a common issue with that generation of VW engines. While not immediately dangerous, continuing to drive with faulty fuel system readings can lead to more serious engine damage over time. The fuel pressure sensor issue causes the engine control unit to receive incorrect readings, resulting in improper fuel mixture. This explains the jerking during acceleration and rough idle you are experiencing. Based on your symptoms and my similar experience, I strongly recommend getting the fuel delivery system checked, particularly the pressure sensor connections. The repair was straightforward but required specific diagnostic equipment to properly calibrate the new sensor. This is not a DIY job due to the need for specialized tools and proper fuel system testing procedures.

Thanks for sharing your Jetta experience. The symptoms do match exactly what Im seeing with my Caddy, especially that rough idle and jerking during acceleration. It really seems like the fuel pressure sensor is the common thread here. I got a bit worried when you mentioned potential engine damage. Since the engine misfire started, Ive been limiting my driving just to be safe. Probably smart to get it checked soon before any fuel injector problems develop. Would you remember roughly what the repair cost you? And did you have any related issues pop up since the sensor was replaced? Hoping to get an idea of what Im looking at cost-wise and if I should expect any other fuel system problems down the line.

Thanks for asking about the follow-up. The fuel pressure sensor repair on my Jetta proved to be spot-on for fixing those issues. Since having the faulty sensor and cable connection repaired for 95€, the rough idle and engine stalling problems completely disappeared. The fuel delivery system has been working flawlessly. The check engine light cleared right after the repair and hasnt returned. The jerking during acceleration is totally gone, and the engine runs smooth as it should. The relatively low repair cost was a relief, especially since I was worried about potentially more expensive fuel system repairs. Its been several months now with no related issues popping up. The fuel pressure readings are stable, and the engine performance is back to normal. Looking back, getting it fixed promptly was definitely the right call to prevent any long-term engine damage. From my experience, once the sensor and connection issues are properly addressed, you shouldnt expect any recurring fuel system problems. Just make sure the shop does a thorough diagnostic to confirm theres no additional wear on the fuel injectors from running with the faulty sensor.

I took your advice and headed to a different mechanic this time. Really glad I did because the experience was much better. They ran a complete diagnostic on the fuel system and confirmed exactly what you mentioned, it was indeed the fuel pressure sensor causing all those problems. The total repair came to 120€, which included replacing the sensor and cleaning all the connections. What a relief compared to what I was fearing it might cost. The mechanic showed me the old sensor and you could clearly see the corrosion on the connectors. The difference in how the car runs now is like night and day. No more engine stalling or rough idle issues. The check engine light cleared up right away and the jerking during acceleration is completely gone. Fuel economy has even improved a bit since the repair. The mechanic mentioned I caught it at a good time before it could cause any damage to the fuel injectors. Really appreciate the heads up about getting it checked promptly, definitely saved me from bigger problems down the road.