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P1445 Maximum threshold of additive in the particulate emission filter reached

61K views 11 replies 6 participants last post by  boostin  
Thanks, a local independent Peugeot specialist checked it out and came up with the faults:
P1445 Additive etc
Fuel filler switch not responding
Differential pressure switch incorrect reading before engine starts

So he is suggesting replacing the DPF, and both switches at ÂŁ500.
He would, in the words of Arthur Daley, that would be a nice little earner with profit on an expensive part and labour costs.

Sounds like the fuel cap sensors aren't working and it hasn't been injecting ELOYS into the fuel and the filter has blocked. If the filter is blocked or damaged then the differential pressure sensor will report a fault.

1) Get the cap sensors from the dealer and fit yourself. These are mentioned on here a lot so you should be able to find the price by searching.

2) Find a local mechanic who will take off the DPF and pressure wash it.

Or if its totally blocked, get a replacement for under ÂŁ150 from CATS2U. Again, get a local mechanic to fit.