C3 Picasso (2009) - Anti pollution fault (P1471 error)

[alexbromo]

Hi all,

For some months my C3 Picasso (no FAP) sometimes stops in the middle of the road with error "Anti pollution fault", also if fortunately waiting for five seconds then starts again.

After a diagnosis (I have a Lexia 3 with Diagbox) I found the error "P1471 EGR motorized throttle housing"



I replaced the EGR with a new cheap part (and initialized using Diagbox) but the problem has not been solved: i used the car for three monts and the "Anti pollution fault" continued to be shown randomly every two/three days, so i decided to buy and install an original spare EGR Valeo



I just finished the work but after initialized the EGR i noticed a strange thing in the engine running (1000 RPM) scanning task, the message: "EGR throttle electrovalve OCR -> Invalid value"



is it normal ?

Note that with engine at idle the "EGR throttle electrovalve OCR" reported is "68"

I fear that even with the Valeo valve the problem is not solved ...

ALex.

[RichardW]

I think that's OK, the throttle electrovalve is the bypass valve on the intercooler, which always seems to report value invalid. If the EGR request and reported positions match then it should be OK.