Fiat 1.0 Firefly engine issue?

[howiejdean]

I’m seeking advice regarding an issue with my 2021 Fiat 500X 1.0 Firefly engine.

A couple of weeks ago, the car went into limp mode and displayed fault code P06DD – Engine oil pressure control circuit performance/stuck in Off position. I cleared the code, but it quickly returned. (Revs won’t go past 3000 rpm, although overall performance doesn’t seem badly affected.)
So far, I’ve:

• Changed the oil and filter twice
• Cleared the code again (but it keeps returning)

The fault code is now showing as Permanent, although the check engine light doesn’t appear until after about 8+ miles of driving—usually around 2000 rpm. The failure is intermittent.

I took the car to my local garage (the mechanic is very good with diagnostics), and we discussed the next steps. He:

• Checked the oil pickup in the sump (it was clean)
• Ran engine cleaner through again (the oil wasn’t great despite being changed only a few miles previously)
• Tested oil pressures across the rev range to monitor performance

At this stage:

• Since the fault is intermittent, I didn’t want to replace the oil pump right away
• My plan is to change the Oil Pressure Sensor next before taking it back to the garage

Has anyone experienced a similar issue with the Firefly engine oil system? Any advice would be much appreciated.


Thank you,
Howie