A general search on ESP warning light gives. The most common reason the ESP light illuminates is because of a faulty ABS sensor or ABS ring. It can also be caused by issues like a bad throttle body, brake pedal switch, or steering sensor. If it's blinking while driving on a slippery surface, it's working correctly. Quote.
Well my C4 has managed to lose the economy mode function. I know it was there for the first 18 months of its life then poofff. Result, 2 flat batteries through leaving the radio switched on. It's booked to see the Citroen doctor next week, and yes they said it was an impossibility until it was demonstrated to them. thanks for the replies, ive charged the battery up now showing 12.6 volts and still same no ignition no mirrors unfolding just jumping straight into economy mode active. it was working perfectly day before this happened no signs of any problems and never had a problem before with the battery starting or any battery faults showing. That unit that gave a link too supplies a list of the generic codes. Its not as good the lexia reader that Citroen use but it does the trick 90% of the time. With the codes clear, the limp home mode is turned off. Beware though, if the problem is a serious one, clearing the codes and getting out of limp home mode might make the matter worse. Gary. . 230 240 240 256 135 259 353 50 385