P0103 error code without check engine light...Help!

:
Romania
:
DY 2004 1.4 CD
I have a diesel mazda 2 from 2004 in Europe.
I keep getting P0103 error code on OBD, even after cleaning the MAF. No check engine light.
The engine seems to run normal even with the error present.
I checked the MAF wiring and everything is ok, I think.
Wiring after testing with multimeter:
  • 2 ground wires that have continuity with the battery
  • 1 hot wire with 12V
  • 1 hot wire with 5V
  • 1 signal wire, 2.5V at idle (8 grams/second) and rises linearly with the RPM.
I have not idea if that voltage for the signal wire is normal or not.
I don't know what can I do to fix it. Attached photos of error code and MAF+RPM graphs during a normal drive.
 

Attachments

  • Screenshot_20220721-171058.png
    Screenshot_20220721-171058.png
    61.6 KB · Views: 103
  • Screenshot_20220721-171109.png
    Screenshot_20220721-171109.png
    9.3 KB · Views: 90
Back