Your battery does not have any sensors in the battery or for the battery. The charging system does have warning light for under or overcharging conditions.
Hi there - yes, I believe you are correct. Sounds like the diaphragm in the booster has ruptured (https://www.yourmechanic.com/question/-why-is-newly-replaced-brake-booster-making-a-whistling-noise-and-brake-pedal-staying-depressed-by-chris), and is leaking air (to the engine), resulting in little or no brake pedal effort assist. I recommend a brake booster...
Hi there. In most cases, when a error code is triggered, it indicates that there is an issue that should be inspected or repaired as soon as possible. Depending on the error code, your issue could be due to a...