Failing MAP Sensor Cripples Audi S5 Performance

Used to own a 2011 Audi S4 that showed similar symptoms. The manifold pressure sensor failure created noticeable performance issues. The engine would feel significantly underpowered, especially during acceleration, and fuel consumption increased by about 15%. The diagnostic check revealed a faulty pressure sensor in the intake manifold, but the root cause was actually a vacuum leak. These automotive sensor issues often mask deeper problems. The intake manifold gasket had deteriorated, causing incorrect readings from the manifold pressure monitoring system. The repair required: Complete manifold pressure sensor replacement, New intake manifold gasket installation, Vacuum line inspection and replacement, Full system diagnostic check This was a serious issue that needed immediate attention. Continuing to drive with these symptoms risks further engine performance problems and potential damage to other components. The repair took about 6 hours at the shop. Watch out for these additional symptoms: Rough idle, Unusual misfiring, Inconsistent throttle response, Hard starting Recommend getting a proper diagnostic scan from an Audi specialist who can verify if the sensor failure is isolated or connected to vacuum system issues.

Thanks for sharing your experience. The symptoms you described with your S4 match exactly what I am experiencing with my S5. The sluggish engine performance and increased fuel consumption are particularly concerning. Did you remember how much the total repair cost? Also, have you encountered any similar MAP sensor or intake manifold issues since the repair was completed? My mechanic quoted a surprisingly high price and I want to make sure I am not being overcharged for this manifold pressure sensor replacement.

After fixing the faulty manifold pressure sensor and vacuum leakage in my S4, everything worked perfectly with no recurring issues. The total repair cost was 235 Euro, which included fixing a significant vacuum leak they discovered during the diagnostic process. The engine performance returned to normal immediately after the sensor replacement and intake manifold repair. Fuel consumption dropped back to standard levels and the sluggish acceleration completely disappeared. The car sensors now provide accurate readings, and the check engine light hasnt come back since. Based on my experience, your mechanic might need to check the entire intake manifold system, not just replace the pressure sensor. The cost I paid was reasonable considering the thorough diagnostic work and complete repair of the vacuum system. Its been two years since the repair, and the engine performance has remained strong with no similar sensor issues. Getting it fixed properly the first time prevented any potential cascade of problems that could have developed from running with incorrect manifold pressure readings.

Thanks everyone for the helpful replies. I finally got my S5 fixed last week after finding a specialist who really knew their stuff. The total repair ended up costing 290 Euro, which included replacing both the manifold pressure sensor and fixing a cracked vacuum line they discovered during inspection. The engine performance improved dramatically right after the repair. The sluggish acceleration is completely gone and fuel consumption is back to normal levels. The check engine light cleared up and hasnt returned. What really made the difference was finding a shop that did a thorough diagnostic check first. They found the vacuum leak was causing the manifold sensor to read incorrectly. Fixing both issues together solved the problem completely. The repair took about 5 hours total but was worth the wait. After 2 weeks of driving, the car feels like new again. The throttle response is crisp and power delivery is smooth. Really glad I got this sorted before it could cause any additional engine performance problems.