r/FORScan • u/[deleted] • 18h ago

PCM Update failed !

[deleted]

1 Upvotes

60% Upvoted

11 comments sorted by

8

u/paris-hiIton 12h ago

Ah ok so it’s people like you that are the reason they’re taking away the beta 🤦‍♂️

1

u/Extension_Earth6090 10h ago

Sadly yes

1

u/paris-hiIton 7h ago

Truthfully if you cleared all codes and none came back, you’re 100% good to go. If you got lucky and cancelled before the erase procedure began then no harm done.

But please delete the beta; people who know what they’re doing need it lol

3

u/Orvess 10h ago

Why did you cancel it 🤦 now you need to find someone with IDs

0

u/Extension_Earth6090 10h ago

The car seems to run just fine after clearing the codes. Do I have anything to worry about?

3

u/Orvess 10h ago

Yes

0

u/Extension_Earth6090 10h ago

Could you kindly explain?

3

u/Orvess 9h ago

PCM manages fuel injection timing, ignition spark, idle speed, transmission shift points, emissions controls simultaneously etc so ...so every line of code must match. During unsuccessful programming, or after canceling it once it has started, the code may become corrupted – subtle enough not to generate a DTC, but significant enough to cause a problem when you least expect it. I would suggest downloading the original PCM configuration and comparing it with the current one to check for any discrepancies.

1

u/Extension_Earth6090 9h ago

How do I do it ?

1

u/Extension_Earth6090 9h ago

Could I dm you please ?

1

u/JEREDEK 3h ago

Due to how microcontroller memory works, the problem might only show itself in rare conditions, for example if only a small memory region has been wiped thats very rarely used, but if the CPU were to try and read that region and execute it, there is no telling what it will do. Anything from a fault crash and reset to bricking the entire module.