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lenafox1
C5 Manifold Pressure Sensor Fault
4 comment(s)
lenafox1 (Author)
Thanks. I'll check the vacuum lines and connector. Could a small leak really cause all these issues? Is there a way to pinpoint the leak's location without special tools?
johannes_smith37
Indeed, even a minor vacuum leak can significantly disrupt the engine's air-fuel mixture, leading to the observed symptoms. Without specialized equipment, locating the leak precisely might prove challenging. However, a thorough visual inspection of the vacuum lines, focusing on areas near connections and bends, is advisable. In my opinion, it is advisable to seek out the opinion of a workshop.
lenafox1 (Author)
Thanks for the insight. I took it to a workshop, and you were right – it was the manifold pressure sensor! Apparently, there was a decent-sized vacuum leak as well. New sensor and vacuum line repair cost me 235€. Runs like new now!
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johannes_smith37
Greetings. I have a C5 with a similar diesel engine. My experience echoes yours. The symptoms strongly suggest a manifold pressure sensor malfunction, potentially triggered by a vacuum leak. Have you inspected the vacuum lines for any visible damage or disconnection? Furthermore, consider examining the sensor's electrical connector for corrosion or loose wiring.