Hello, Does the Citroen ZX (P regn.) 1.9 cc diesel non turbo, 5door hatchback, advantage, have a ECU. The battery on my sons car exploded, and now, with a new battery we cannot start the car, it would appear that the keypad will not accept the code. I have been informed from one scource that a power surge may have damaged the ECU. but another scource tells me there is no ECU on this model. We have left the ignition switched for over one hour so that the ECU or whatever can reset itself, but to no avail, the engine turns over but will not fire, the battery is fully charged. Any advice on this problem would be greatly appreciated. harryh