Peugeot 307 sw 1.6 hdi 2008 Fuel Tank Access Not Locked Fault

[Clogg]

Hi

I am getting this fault intermittently. Have replaced fuel cap and sensor loom. Diagbox (clone) picks up this fault and also lists no communication with additive ECU. Is there an ecu or might it be built in to engine ecu / bsi. What wiring should I check.

Thanks

Clogg

[Dunker]

Can't remember off hand but is there something under passenger seat on these.

[Clogg]

Thanks for the tip. I've had a good look for an ECU near the passenger seat and can't find one so I'm thinking that it must be built into the BSI but I can't find any wiring diagrams so am having trouble chasing the wiring to check if there is a problem