error emissions ( P0201, P0203, P0204, P0202 )

Hi,

My 2006 Citroën C3 ( 1.6 16V ) gives an error message saying there is an error in the emissions system.

When diagnosed with an OBD2 scanner it gives me the following codes: P0201, P0203, P0204, P0202

All 4 stating circuit malfunction. I've searched but have only found people who got 1 of 4 faults, but can't seem to find with all 4 codes.

Any ideas what this could be?

Hi,

Does it run ok? Not in limp home mode?

What happens when you clear the codes with the OBD reader?

It runs fine, managed to drive home without any problems. Does seem to be less fuel efficient tough, but no lack of power or whatsoever.

And i'll try clearing the codes tomorrow.

For there to be a problem on all 4 injectors it would have to be a positive supply problem of some form.
Unfortunately I don't have a circuit diagram for the facelift version.
But the supply will come from one of the multi way connectors on the BSM, the engine bay fuse box. Pull the connectors out and look for corrosion on the pins.

I've cleared the error codes, after that check engine light is off, and error codes have not come back.

i'll try recreating the conditions on which the errors started to occur tomorrow. Maybe that will point me in the right direction to discover what caused it.