I am surprised your local garage wouldn't deal with your problem. Several people on the forum have repaired this sort of thing themselves. It may be worth trying another garage.Hi,
2013 1.6HDi has P1434 Multiplexed Fuel Additive Pump Fault.
Local garages won't touch it and all telling me dealer only issue. Can't get booked in for nearly 4 weeks.
Is it safe to drive it ??
Did the problem appear just after you filled up? It could be as simple as refilling the EOLYS fluid. Depending on your exact engine it may require a new pump or additive tank. some systems have a bag and a seperate pump others have a tank with integrated pump.
The purpose of the EOLYS fluid is to lower the temperature needed to burn off the soot in the particle filter. Not all car manufacturers use this system. When you fill the car the additive pump injects a measured amount of EOLYS into the fuel. The danger is that if you use the car too much with no EOLYS in the fuel the regeneration process may not be able to remove all the soot and the DPF will block. My guess is you are probably okay for four weeks if you don't do too much driving.