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Home >> Mercedes Benz >> 1992 >> 400SE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4.2L >> Retrieving Codes >> Notes
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Retrieving Codes: Notes

NOTE: On LH-SFI vehicles, on/off ratio output is used to diagnose intermittent problems. On all LH-SFI vehicles, Diagnostic Trouble Codes (DTC's) are used to diagnose hard failures.
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