P0171

[508c5]

Hello,

Got the P0171 trouble code on my Citroen c4 Picasso 1.6 THP 165 BHP with vin number VF7**************[VIN obfuscated, can be read by forum staff] - Can you check and advise of the manufacturers "protocol" for this one ?

BTW - Richness (lambada) value is 1.0, idling is unstable

THANKS

[GiveMeABreak]

Can't help with this with a specific descriptor, but it may have something to do with the incorrect position of the air filter deflector. Make sure that the air filter is positioned correctly and also that the air deflector is also correctly in place - misalignment disrupts the airflow at the inlet of the motorised throttle body and can cause incorrect reading of the airflow.

[508c5]

Can't help with this with a specific descriptor, but it may have something to do with the incorrect position of the air filter deflector. Make sure that the air filter is positioned correctly and also that the air deflector is also correctly in place - misalignment disrupts the airflow at the inlet of the motorised throttle body and can cause incorrect reading of the airflow.

thanks, by "air deflector" you mean ... ? is there a diagram ?

the air flows into the filter from the left side and the throttle body is on the right side, so i don't have the picture in mind...

[508c5]

The "fat" hose connecting between the air filter and turbo charger was the cause