: Low voltage in the main car battery can cause "ghost" faults in the BSI. Ensure the battery is fully charged (typically above 12.7V when off).
: The small ring around the ignition barrel that "reads" your key might be faulty or disconnected. b173d peugeot
: This is the simplest and cheapest first step. : Low voltage in the main car battery
If voltage tests show no power, trace the two wires back to the BSI (under the dashboard). This is tedious. A professional auto electrician will charge ~$80 to repair a broken wire. Do not attempt unless you have wiring diagrams. b173d peugeot