DTC U1400 U1318 F9D1

[Spence4032]

Hi
I'm new to the forum and have just purchased a Citroen C5 Tourer one week ago. Twice now I have had the EMS warning light appear on the dash when i have tried to accelerate quickly,
I have used my Carpal OBD2 diagnostic tool to read the fault codes and it has come up with codes U1400, U1318 and F9D1.
Any help would be appreciated in telling me the cause of the fault codes and possible solutions to fixing them.
Please help and many thanks for any help that I receive

[mickthemaverick]

The two U codes are both indicative of a potentally low battery condition. Your battery should show 12.7 volts when idle and 13.8-14.5 with the engine running. As you have just bought the car it may have been standing around for a while and need a decent charge. No idea about the F9 code I'm afraid. It is probably worth checking the voltages and then carry out a BSI reset as per the procedure in the link below. Then rescan for fault codes and see where you are. Good luck

viewtopic.php?p=601679#p601679

[Spence4032]

Hi, thanks for that information and I will certainly try what you have suggested, hopefully that solve my problems.
Once again thank you.

[PaulC5]

If bought from a dealer they would have provided a warranty so something to consider if a battery charge does not help. If bought privately ask the previous owner what they know about it, they may be unaware or have tried a few things and save you repeating them.

By idle, Mick meant 12.7 volts before starting the car for the first start of the day, not with the engine running on tick over.