problem with citroen c5 2.2Hdi

[StjepanpejicCcc]

problem with citroen c5 2.2Hdi when driving for a long time on the open road, the yellow and service engine light comes on. ESP / asr system faulty also comes on. where the engine can't go over 3000 rpm. it loses power, and when you turn off the car and start again s stays on from the engine and service..some time the next day and those errors disappear, it only happens on the open road (highway) who someone knows what the problem is would be grateful, thanks in advance to all Citroen owners

[GiveMeABreak]

You need fault codes - we can't help without these. A fault that causes the engine to go into reduced power mode will be as a result of the engine ECU deliberately limiting power until the fault is addressed to avoid damage. This will very likely generate stored fault codes and you need to get a proper diagnostic first of all, otherwise it will be pure guesswork.