same as obd code U1262, it means a communication error on the Can-Bus wiring between the PCM or BCM and the Dash Clocks, so i'd start by checking all the connections, on the clocks first
03 2.4 TDDI 90 t350 LWB HR white panel van X reg 2.4 TDDI 90 t350 MWB MR Yellow Panel van 56 reg lwb high roof connect, 1.8 tdci 90 t 220
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I had this and cured it by changing the fuel filter.
Before changing the filter the van would stop going over 3K revs, no warning lights came on but this code was stored in the cluster, that was the only code and went upon changing the fuel filter.