tobiasknight6
Epica Manifold Pressure Sensor Issue
Summary of the thread
A 2012 Chevrolet Epica with a gasoline engine is experiencing issues such as the check engine light turning on and off, reduced engine power, poor response, and increased fuel consumption. Diagnostics suggest a faulty manifold pressure sensor, potentially caused by a vacuum leak. The problem was resolved by consulting a technician who confirmed the defective sensor and fixed minor vacuum leaks, leading to improved vehicle performance.
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4 comment(s)
tobiasknight6 (community.author)
I've visually inspected the vacuum lines for damage. Could you explain how you diagnosed the manifold pressure sensor on your Saab?
franziskahofmann1
Honestly, after checking the basics, I just took it to a trusted mechanic. Didn't have the right tools to properly diagnose it myself. They confirmed the MAP sensor was faulty and replaced it. Best bet is probably getting it properly diagnosed to be sure.
tobiasknight6 (community.author)
I took your advice and consulted a technician. They confirmed a defective manifold pressure sensor. Replacing the sensor and fixing minor vacuum leaks resolved the issues. Total cost was 235€. Thanks again for your help.
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CHEVROLET
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EPICA
franziskahofmann1
Sounds familiar. I had a similar issue with my old Saab 9-3. Check engine light, sluggish performance, the whole shebang. Turned out to be a bad MAP sensor as well. Have you checked for any obvious vacuum leaks around the intake manifold?