VW Touran Fuel Pressure Sensor Fix Guide

Having worked on diesel engines for a few years, I faced a similar rail pressure sensor issue with my 2011 VW Passat TDI. The symptoms matched exactly what you describe, engine performance issues, stalling, and warning lights. My fuel injection system showed the same behavior, and after proper diagnostics, the workshop confirmed a faulty pressure sensor on the common rail. The repair involved replacing the rail pressure sensor and recalibrating the fuel system. Total cost was 240€, including parts and labor. The fix restored normal engine performance and resolved all symptoms. Important to note that proper diagnostic steps are crucial, as similar symptoms can sometimes stem from other fuel system components. To provide more specific advice regarding your Touran: What error codes is your engine showing? Have you noticed any specific driving conditions when the problems occur? Does the engine performance change with temperature? When was the last fuel filter change? This information would help compare situations and offer more targeted suggestions for your specific case.

Just had my last service at 125000km and they did a full diagnostic scan. The error codes showed P0193 and P0087. Problems mostly occur during cold starts and when the engine is at operating temperature in stop-and-go traffic. The fuel filter was replaced during the 120000km service about 6 months ago. No issues with temperature changes noticed. The diesel engine runs smoothly at higher speeds but struggles noticeably at idle. Fuel consumption has increased by about 1.5L/100km since these symptoms started. The sensor signal seems inconsistent based on the scan data the workshop shared.

These error codes directly point to fuel rail pressure issues, exactly what I encountered on my Passat. P0193 typically indicates a fuel rail pressure sensor circuit high input, while P0087 shows fuel rail pressure too low, matching the behavior you describe. The cold start and idle problems, combined with increased fuel consumption, strongly suggest the sensor signal is indeed faulty. This matches perfectly with what I experienced. When my sensor started failing, it would send irregular readings to the ECU, causing similar drivability issues. The ECU receives inconsistent sensor signal readings and responds by adjusting fuel injection parameters incorrectly, leading to your observed symptoms. In my case, the fuel rail pressure sensor replacement resolved all these issues, including the higher fuel consumption. Since your fuel filter is relatively new, we can likely rule that out as a cause. Based on the diagnostic data and symptoms, I would confidently say you are dealing with the same pressure sensor failure I experienced. The repair should be straightforward, replacing the sensor and performing the necessary calibration solved it completely on my vehicle. For reference, after the repair, my fuel consumption returned to normal, cold starts became smooth again, and the check engine light never returned. Just ensure the workshop uses OEM parts for the replacement.

Based on those replies, I really appreciate everyone sharing their experiences, especially the detailed breakdown about the P0193 and P0087 codes matching exactly with the rail pressure sensor issue. Those error codes combined with my symptoms seem to point clearly to the sensor being the culprit. I will get it checked out right away since both the cold start problems and increased fuel consumption are becoming a real hassle. Good to know that a straightforward sensor replacement fixed these exact issues for others. The fact that it resolved the engine stalling and brought fuel consumption back to normal is really encouraging. Will ask my workshop specifically about the OEM sensor replacement and proper calibration process. Given that my fuel filter is still good from the recent service, focusing on the rail pressure sensor makes perfect sense. I will update once the repair is done to confirm if it solved all the check engine light and performance problems like it did in the other cases. Think this gives me enough confidence to proceed with the repair rather than wasting more time troubleshooting. Thanks for helping narrow down the likely cause.