Yukon Fuel Rail Sensor Issues Cause Stalling & Power Loss

I had a similar issue with my 2002 Sierra last year. I have some experience doing basic repairs, but diagnostic work with fuel injection systems is beyond my skill level. The symptoms matched yours exactly, check engine light, stalling at idle, and notably poor performance. The mechanic first connected a diagnostic tool to verify the fuel rail pressure readings were inconsistent. They tested the fuel pressure at different points to isolate the problem before confirming the sensor was faulty. The repair cost me 240 Euro total including parts and labor. The fuel pressure sensor replacement solved all the issues and the engine has been running smoothly since then. Before offering more specific advice, could you share: Current mileage on your Yukon? Any recent fuel system repairs? Are you getting specific error codes with the check engine light? Does the problem get worse when the engine is warm? These details would help determine if your situation is truly similar to what I experienced with the rail pressure sensor.

My Yukon has 61128 KM and the last service was done 3 months ago. The sensor signal issues started shortly after that service. I am getting error code P0193, which points to the fuel rail pressure sensor circuit having high input. The problem definitely worsens when the engine is warm, especially in stop-and-go traffic where the engine stalling becomes more frequent. The fuel injection system has not had any recent repairs. I will take it to have the fuel pressure tested based on your experience. The 240 Euro repair cost seems reasonable if it resolves all these engine stalling issues I am experiencing.

Based on what you described, this definitely mirrors my Sierra experience. The P0193 code combined with the symptoms worsening in warm conditions strongly suggests a faulty fuel rail pressure sensor, just like my case. The fuel pressure test is crucial, when my mechanic ran it, the sensor readings were wildly inconsistent with the actual pressure in the fuel rail. This diagnostic step confirmed that the sensor signal was the issue, not the fuel pressure itself. Since your vehicle has relatively low mileage and the problem started after a service, have the mechanic check if the sensor connections were disturbed during that work. In my case, the sensor itself had failed, but sometimes the wiring or connections can cause similar symptoms. The engine performance issues and stalling should clear up completely after replacement. For reference, my Sierra needed about 30 minutes of work for the repair, and the sensor has performed flawlessly for over 15000 KM since replacement. Would recommend getting it fixed soon, as running with inaccurate fuel pressure readings can affect long-term engine performance and possibly damage other components in the fuel system.

Thanks for sharing those details about your Sierra repair experience. I agree the P0193 code and symptoms match my situation perfectly. The fact that both our vehicles show similar behavior with warm engine conditions and stop-and-go driving makes me more confident the fuel rail pressure sensor is the culprit. I will schedule the diagnostic test this week. Having the fuel pressure tested at different points, as you mentioned, seems like a smart approach to confirm the sensor is actually faulty before replacing parts. The 240 Euro cost is within my budget, especially considering the risk of additional engine performance issues if I keep driving with this problem. Will definitely have them check the sensor connections too, since this started after my recent service. My diesel engine really struggles with the stalling, so getting this fixed quickly is a priority. I appreciate you sharing the specific repair time and long-term results, helps set realistic expectations for the repair. Hope this goes as smoothly as your repair did. Thanks for all the detailed information about your experience, exactly what I was looking for when I posted.