Corsa Manifold Pressure Sensor Fault

That sounds incredibly frustrating, I feel your pain. I had a similar issue with my Corsa. Same symptoms: check engine light, power loss, and awful fuel economy. The diagnostics also pointed to the manifold pressure sensor. Have you inspected the hoses connected to the intake manifold carefully? Sometimes a small crack can be the culprit.

Thanks for the quick reply! I did visually inspect the hoses, but I didn't do a thorough check for tiny cracks. Was it difficult to locate the leak on your car? Did you replace the sensor yourself, or did you take it to a shop?

Locating the leak was a bit of a pain, to be honest. It was a hairline fracture on the underside of one of the hoses, almost impossible to see without really bending it. Considering the potential impact on the engine's performance and the intricacies involved, I ultimately decided to take it to a reputable workshop. They confirmed the faulty sensor and the vacuum leak, and replaced both.

Okay, that's good to know. Sounds like I'm heading down the same path. I appreciate the insight – I'll book it in with a mechanic. They've quoted me 235€ for the sensor replacement and fixing the leakage, so hopefully, that will solve it. Thanks again!