VW Touran Engine Issues Point to Bad MAP Sensor

I experienced something very similar with my 2019 VW Tiguan last year. Having worked on several cars over the years, I encountered these exact symptoms. The engine performance issues started much the same way, sluggish response, increased fuel consumption, and the check engine light. Initially thought it was the manifold sensor, but the workshop diagnosed a significant vacuum leak affecting the manifold pressure readings. The repair involved: Complete diagnostic testing of all car sensors, Leak detection in the intake system, Replacement of cracked vacuum lines, Recalibration of the manifold pressure sensor, Final testing to confirm proper readings Total cost came to 235€ including parts and labor. The fix completely resolved the performance issues and returned fuel consumption to normal levels. To provide more specific advice for your case, could you share: Current mileage on your Touran, Any recent maintenance performed, Whether you notice any unusual sounds from the engine, If the problems started suddenly or developed gradually, The engine size and specific model variant The automotive sensor systems can be quite interconnected, so these details would help identify if your issue matches what I experienced.

Just had my regular service done last week. Went through all sensor diagnostics and they confirmed the manifold sensor failure. A full sensor replacement was needed, but the mechanic also discovered a small air leak that was contributing to the problem. The repair included: Manifold sensor replacement, Fixing the air leak, Full system calibration, Test drive verification Total repair cost was 320€ and the car runs perfectly now. Performance is back to normal and fuel consumption has dropped back to expected levels. The sluggish response is completely gone. If your symptoms match mine exactly, recommend getting a proper diagnostic test done to rule out other car sensors that might be causing similar issues.

Thanks for the update on your Touran repair. Your experience matches mine exactly, I also had my 2019 Tiguan serviced recently and the mechanics found both a faulty MAP sensor and a minor vacuum leak. The manifold pressure readings were way off due to this combination of issues. Pretty interesting that the repair costs were similar too. My total was 235€ while yours was 320€, likely due to different labor rates and parts costs. The automotive sensor replacement and recalibration process sounds identical to what my shop did. The key learning from both our cases is that when dealing with manifold sensor problems, its worth checking for vacuum leaks too. These issues often occur together since both affect the pressure readings that the engine management system relies on. Good call on getting the full diagnostic test done. Modern cars have such interconnected sensor systems that properly diagnosing the root cause is crucial for an effective fix. Glad to hear your Touran is running properly again.

Thanks for the helpful input. I wanted to close the loop on my Touran situation since it might help others. After getting it properly diagnosed, it turned out both a manifold sensor failure and a vacuum leak were causing the issues. The intake manifold showed incorrect pressure readings which triggered the check engine light and performance problems. The complete sensor replacement and repair included: New manifold pressure sensor, Vacuum leak fix, System calibration, Full testing Total cost was 320€ but worth every cent. The car runs perfectly now with normal fuel consumption and proper acceleration response. The pressure sensor readings are stable and all engine parameters are back to factory specs. For anyone experiencing similar symptoms, definitely get a full diagnostic test done. Multiple car sensors can cause these issues, so proper testing is crucial before jumping to conclusions about which sensor needs replacement.