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Home › Oldsmobile › 2003 › Aurora › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Tests › DTC P1404: EGR System Performance › Diagnostic Procedures

Diagnostic Procedures

Fig 1: DTC P1404: EGR System Performance (Steps 1-11)
G00248741Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P1404: EGR System Performance (Steps 12-20)
G00248742Courtesy of GENERAL MOTORS CORP.
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