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P0403 on the 2000 Ford Focus

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

Bulletins for this model year that name P0403
175052004-06-14. Service bulletin. RUNS ROUGH AND/OR MALFUNCTION INDICATOR LAMP (MIL) ON CONDITION WITH DIAGNOSTIC TROUBLE CODES (DTCS) P402 AND/OR P0403 (EGR FLOW EXCESSIVE DETECTED/EGR CONTROL CIRCUIT) IN WET WEATHER OR IN A CAR WASH. *TT
031522003-10-10. Service bulletin. DIAGNOSTIC TROUBLE CODES (DTC) P0402 AND/OR P0403 OR RUNS ROUGH IN WET WEATHER CONDITIONS. *TT

2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.