Astra Brake Booster Pressure Sensor Fault

The symptoms you describe strongly suggest a potential malfunction within the brake booster pressure sensor circuit. The error message, diminished braking performance, and logged diagnostic trouble code all point towards this component. It's essential to investigate this promptly, as compromised braking can severely impact vehicle safety. Has the brake system been recently bled or otherwise serviced? Improper bleeding can introduce air into the system, leading to erratic pressure readings and potential sensor failure. The brake booster uses vacuum to assist the driver in applying the brakes; the pressure sensor monitors this vacuum. When it fails, the Engine Control Unit (ECU) receives incorrect data, causing the issues you’re experiencing.

Bleeding... hmm, yeah, I had the brakes bled last month. Is it possible that the brake guy messed something up? Like, how badly can a brake bleed go wrong to cause this sensor thing?

A seemingly minor oversight during brake bleeding can, unfortunately, lead to significant complications. If air remains trapped within the hydraulic lines, it can introduce compressibility, which diminishes braking efficiency. Furthermore, the air can migrate towards the brake booster and interfere with the pressure sensor's readings. Considering the temporal proximity between the brake bleeding and the onset of your symptoms, it is quite plausible that an error during the bleeding procedure has contributed to the sensor malfunction. Given the potential safety implications, I would strongly recommend taking your Astra to a qualified workshop for thorough diagnosis and rectification. They will be able to assess the sensor's functionality and re-bleed the brakes correctly.

Thanks a lot for the help! Took it to the shop, turns out the bleeding was the culprit. New sensor and a proper bleed and now everything is good again. Cost me 90€ Appreciate the guidance!