Removed the additive reservoir and tested it with 12v - I would expect to be able to hear the pump - … £190 (purchased one this week for a customer). It is integral to the additive tank. If the additive pump has indeed failed then a new pump will be required. Ditto engine code that fault code P1345 is for a comms fault betweens MFCU and additive pump according to AD and All D - no separate additive ECU but I stand to be corrected.
Attached is the printout.
There is a can communication problem and suspect area is "Additive Pump" Peugeot would probably insist on new additive. Cost iss approx. Not a lot of info... Mt I O, I O, its off to work I go!
Have reached the minimum level of DPX42 additive into my Peugeot 607 2.2 HDi 4HX 133 HP. This came around the same time with a faulty differential pressure sensor. Car still with main dealer, fault cleared at present, but has been cleared twice before only to return after 2 days. There are no coding issues on a vehicle of your age which is good news. 2004 307 HDi 1.6 Due to poor performance ran peugeot planet fault find and came up with (amongst others) issues relating to the FAP - specifically open circuit on the additive pump. The faulty sensor has been replaced by a FAP emulator and the additive pump has been fitted …