Failing MAP Sensor Drains Q7's Power and Fuel Economy

Having some experience with Audi vehicles, I encountered a very similar issue with my 2016 Audi Q5. The symptoms matched exactly what youre describing, sluggish acceleration, increased fuel consumption, and check engine light. The automotive sensor readings initially pointed to a MAP (Manifold Absolute Pressure) sensor problem, but after a thorough inspection, the mechanic discovered a significant vacuum leak in the intake manifold system. The leak was affecting engine performance and causing incorrect readings from the manifold sensor. The complete fix included replacing some cracked vacuum lines and a thorough inspection of the intake manifold assembly. Total repair cost was 235 Euro, including parts and labor. The car ran perfectly after the repair, with restored performance and normal fuel consumption. To provide more specific advice for your Q7: What engine size do you have? Have you noticed any unusual sounds, particularly a hissing noise? Did you scan for specific error codes? Has there been any recent maintenance work done on the engine? These details would help determine if youre facing the same underlying issue or if its actually a faulty car sensor.

Last serviced at 61522KM, and I can confirm the engine size is 3.0L. The error code showed P0106, which points to a manifold pressure sensor malfunction. After checking suggested solutions in the service manual, I noticed slight damage on the sensor connector. The wiring harness showed signs of wear where it connects to the intake manifold sensor. Before I proceed with the repair, has anyone experienced similar wiring issues with the MAP sensor? The dealer quoted 450 Euro for the complete sensor replacement, but Im wondering if a wiring harness repair might be sufficient.

Thanks for providing those additional details about your Q7. Having fixed a similar issue on my Q5, I can confirm that wiring problems with the manifold pressure sensor are quite common in these engines. In my case, I initially considered just repairing the wiring harness to save money. However, when dealing with engine performance issues, I learned that damaged wiring often indicates the sensor itself has been exposed to excessive heat or vibration. The P0106 code combined with the visible connector damage strongly suggests you should replace both the MAP sensor and the associated wiring harness. From my experience, attempting just a wire repair often leads to recurring issues within a few months. The 450 Euro dealer quote for sensor replacement actually sounds reasonable. When I had my work done, I chose to replace both components: New manifold pressure sensor, Complete wiring harness section, Professional installation and testing This resolved all symptoms: Check engine light cleared, Power restored, Fuel consumption returned to normal, Smooth acceleration Considering the 3.0L engine in your Q7, proper sensor function is crucial for optimal performance. Incorrect manifold pressure readings can cause significant running issues and potentially damage other components if left unaddressed.

Thanks for the detailed information. After reviewing all the responses and considering the consistent P0106 error code pointing to manifold pressure sensor issues, I think I will proceed with the complete sensor replacement at the dealer. The wiring damage I found matches the symptoms others described, and attempting a partial fix could end up costing more in the long run. Engine performance is critical on the 3.0L, so investing in proper repair with new components makes sense. I will schedule the MAP sensor and wiring harness replacement this week. The 450 Euro quote seems fair based on other experiences shared here. Will update the forum once the repair is completed to confirm if it resolved the throttle response and fuel consumption problems completely.