levinacht15
Volvo S60 engine power loss
Summary of the thread
A 2012 Volvo S60 diesel experienced reduced engine power, poor response, and increased fuel consumption, with the check engine light on. These issues were suspected to be caused by a faulty manifold pressure sensor, potentially due to a vacuum leak. A workshop visit confirmed a significant vacuum leak affecting the sensor, and the necessary repairs were completed.
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4 comment(s)
levinacht15 (community.author)
Is it possible that even a small, undetectable leak can lead to such significant performance issues? I haven't been able to identify any.
martha_schmidt1
Yes, absolutely. Even a small vacuum leak can throw off the manifold pressure readings, leading to the problems you're experiencing. Considering the symptoms and your inability to find a leak, it might be time to consult a workshop. They can perform a smoke test to pinpoint any leaks and properly diagnose the MAP sensor.
levinacht15 (community.author)
A local workshop visit confirmed a significant vacuum leakage, leading to the faulty manifold pressure sensor. The repair, including parts and labor, cost 235€. Thanks for pointing me in the right direction.
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VOLVO
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S60
martha_schmidt1
I had similar symptoms on my S60. A faulty MAP sensor can definitely cause those issues. Have you checked for any obvious vacuum leaks? That's often the culprit.