OBCM Issues: Are You Missing Fault Codes When Not Plugged In?

[Genshu_Sheathe_0330]

I’ve been diving into some diagnostics regarding the Onboard Charger (OBCM) for my Fiat 500e and wanted to share an important finding. It seems that even when plugged in, OBD fault codes don’t always appear as expected.

From what I’ve gathered, many owners experiencing OBCM failures reported that all their fault codes remained clear until the vehicle was plugged into a charger. This was a bit of a surprise to me because I was trying to figure out what was wrong without the car being connected, so I may have missed something.

Connect the car to a power source if you're having problems with the OBCM or trying to figure out why it's not charging. You can then see all the relevant fault codes and get a better idea of what might be wrong.

 

[Capt Forest]

Just to clear things up - are you saying the codes gotta be checked while the car’s hooked up to the charger, or do you think they’ll pop back up once it’s plugged in?

 

[Bigdog6792]

Awesome insight! It’s not uncommon for fault codes to pop up only when the Fiat 500e is hooked up to a charger. If you're diving into OBCM issues, definitely plug it in first, it’ll uncover codes that might otherwise stay hidden. That'll help you zero in on the problem way better.

Thanks for sharing!

 

[Sasquatch55]

Just to clear things up - are you saying the codes gotta be checked while the car’s hooked up to the charger, or do you think they’ll pop back up once it’s plugged in?

I think what he’s trying to say is you gotta check out the OBCM while the car’s plugged in. If you skip that step, those annoying fault codes might just chill out and never show up! You get it?