Just wondering if anyone has advice about a compatible diagnostic scanner for pre-2001 cars that have electronic fuel injection. My understanding is that cars of this vintage (like my peugeot '98 306) do have an OBD type socket but do not use the OBDI protocol. This means common scanners can't communicate with the ECU. I have seen a MAXIDIAG fr704 advertised that could be suitable (see link). Otherwise it is always back to the dealer for their proprietary scanner.