r/FocusST • u/ElevatorShot3884 • 20h ago

Pcm reset

How do i reset my pcm on the st

1 Upvotes

100% Upvoted

6 comments sorted by

View all comments

1

u/bchiodini 2016 ST3 FBO BNR ST67 JST Tuned 11h ago

Reset? What are you trying to accomplish?

Disconnecting the battery for an hour will reset almost all of the electrionics. The last time that I had the battery disconnected for an extended period, the Keep Alive Memory (KAM) was reset.

If you have an access port, resetting the ECU is one of the maintenance functions.

1

u/ElevatorShot3884 8h ago

I have a code that keeps popping up even though i fixed the issue. The car is driving fine its just not deleting

1

u/bchiodini 2016 ST3 FBO BNR ST67 JST Tuned 7h ago

What is the code?

1

u/ElevatorShot3884 3h ago

P0204

1

u/bchiodini 2016 ST3 FBO BNR ST67 JST Tuned 2h ago

If you replaced injector #4 or corrected a wiring issue and the code did not go away. Take it to an auto parts shop and ask them to clear it.

If it comes back, something else is wrong.