Engine fault code. Can anyone assist? C4 grand spacetourer 2.0hdi

[Paul73]

Hi

Our car has the service light on and is showing "engine fault"

Code reader is flagging p15b37b fuel additive tank.

Can anyone enlighten me?

Many thanks

Paul

[PaulC5]

How many miles has it done ? This topic might help, it appears your additive level may be low viewtopic.php?t=72019

[Paul73]

Ah, I did think it might be that.

It's on 85,000 now but did have the DPF changed by Citroen about 20k ago.

I'll maybe let the local dealer sort.

Cheers!