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The 1995-2002 Lincoln Continental, especially 1996-2002 models, uses OBD-II diagnostics for the engine and the Ford air suspension system. Common powertrain P-codes include: P0171/P0174 (system too lean bank 1/2), P0300 (random/multiple cylinder misfire), P0401 (EGR insufficient flow), P0442 (EVAP small leak), and P1000 (OBD-II monitors not run). For the air suspension, typical symptoms include compressor running too long, vehicle sitting low, and suspension warning messages. Scan for manufacturer-specific C-codes such as C1725 (air suspension height sensor calibration) and check relays, height sensors, vent solenoid, and air springs. Always verify wiring, connectors, and compressor operation before replacing parts.