ok i realise that my injector light lit especially when rainning or to be exact the undercarriage at the exhaust part splash by water ( the car on the run or engine idling)... did check and it is 1-2-2-4 heated lambda probe....
I would guess the wires are not insulated properly - I would take it out and make sure it is clean, connections are solid, no corrosion and if in bare wire is showing, then insulate it
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