Think the engine wiring loom as a brake in it, engine management light was flickering & it was running rough was checking vacuum hoses when moved wiring loom by accident & notice change in engine tone, the light had gone off. started looking at loom now light is on & won't go off. do you think its a broken wire or just coincidence. engine runs but rough, lot of white smoke when cold.

Cars & Trucks - Peugeot - 405 - 2005 Peugeot 405