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Not enough information to even start you in the correct direction. Put it on a proper diagnostic system (STAR or an iCarSoft system as examples), run a "quick test", then come back with the codes. Your car has approximately 32 digital modules constantly communicating over multiple buses. Suspension malfunction implies something in the Airmatic system (complicated) and the "low coolant" sensor links either via the front SAM or directly to the ECU (I'd have to look at the schematics). So..."...a control box under the dash that has gone bad..." is rather vague.
As far as the airmatic malfunction that is displayed in the cluster. You could have the same issue that I’m currently experiencing, my scan pointed to the auto leveling sensor that sits on top the strut tower as seen here:
I’m not saying that this is your issue, as there are many components that make up the airmatic suspension. My shop ordered two new sensors, that hopefully will be in today. The only true way to know what you issue is, is to have your car probably scanned using Star Diagnostics, as previously mentioned by bbirdwell 👍🏽 This man truly knows what he’s talking about, and is a great source for information. He rocks......
Last edited by Yuille36; Jul 16, 2020 at 08:47 AM.
Oh it's specific to Airmatic? I wasn't sure if the graphic was depicting that the car needed to go on a lift or something (i.e. visit workshop, an issue in almost any module other than the ECU) rather than depicting an issue specific to the air suspension (i.e. ride height error). So I guess in that context, which does it refer to again?
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