ParkSense Unavailable

Given the description I would start testing relays and checking fuses.

This warning is a clue:

"Value of signal protection calculation incorrect".

Something in the protection circuits isn't right, that means a fuse or relay generally.

Looking at the relay diagrams, I can't find the ones for the power steering system or the park sense. However, from my experiment with pulling BOTH fuses - front and rear - for the brake system and how it killed the power steering too (only when both fuses were pulled)... Might just replace those and see what happens. Fuses are cheap.

I have replaced my fuses since then, if you remember the thread my brake fuse was heat scored. It possible there might be enough scoring/oxidation/heat wear the fuse isn't reporting right anymore. Outside chance but I would look.

Will add when I scanned everything for this recent relay replacement I did, I found several codes - which showed in MES but did not trigger a dash light - relating to the transmission and brake system that were similar. None have returned since replacing the relay.

Check them.

Which fuses? The ones in the rear box behind the panel on the passenger side? Only fuses less then 20amp were changed, so none of the 25amp or higher ones were touched?

Did you disconnect the battery before pulling the fuses?

I'm going to try and figure this out if I can let me know which boxes you changed out fuses in and which fuses specifically. I have the suspicion though .... Wiring is goobered up (modified) somewhere in a way that is screwing things up in a unique way.

.... Technically the lift gate should be like the fuses to the power supply for the power windows and seats, and should be a 25amp or higher fuse. It shouldn't have been effected, but this system could be different.


When working on the car.... Double check everything and look for a second source to verify. Never start taking things off till you verified the instructions are correct. (Learned this the hard way myself with all that stupid brake crap, also when I took apart my fender liner to find relays the turned out to be in a different location then the giulia - haven't mentioned it but I broke the black plastic fender arch where the clips attach to hold it in place and ordered new arches. $400 because the Giulia forum's instructions were wrong for the Stelvio, and no one else had the right ones.🤦 Oh well serves me right for not doing the research myself, and for not thinking the plastic could have become massively brittle after 5 years parked outside in the desert.)

Literally everytime I look at something on this car what I find does not 100% agree with the materials provided by Mitchell-on-Demand, All-Data or especially the supossed "official" Alfa Romeo Documents posted to various forums most of which I strongly believe are preproduction documents and not applicable often. Look at the documents/photos, look at what's on the car.... Then hope your basic understanding of how this all works applies enough to sort out the discrepancies.

Definitely strange.

Also strange, that little 5 amp fuse at the bottom right. Little brown fuse in the spot labelled as F90 on the lid..... I can't find a single diagram that says what it is for. The diagrams I find show some fuses I don't have while also not showing fuses I do. Good times......

Pretty sure part of the problem is different markets and translations. Willing to bet Alfa does everything in Italian and translates instruction diagrams from Italian into whatever language they need maybe through multiple steps, IE: Italian to Spanish..then to English. My guess is the people doing the translating from one language to another neither know anything about cars, nor do they speak both languages fluently. Who knows they might just be using Google translate.... And it's filled with bad translations and resulting mis-information. People don't realize, that's what the Japanese do so well that set Honda, Toyota and the rest up for success. They have phenominal translators so their diagrams and instructions are good, translation is viewed as an art form not a worthless expense to minimize.. Alfa.... Not so much.