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Home >> Mazda >> 1998 >> Protege ES, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Introduction >> Self-Diagnostic System >> Visual Inspection
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Visual Inspection

Most driveability problems in engine control system result from faulty wiring, poor electrical connections or leaking air and vacuum hose connections. To avoid unnecessary component testing, perform a visual inspection before beginning self-diagnostic tests.