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Engine Controls - Tests W/Codes - OBD-I (3.0L): Introduction: Notes

NOTE: If no faults were found while performing steps in BASIC TESTING - 3.0L article, proceed with self-diagnostics. If no trouble codes or only pass codes are present after entering self-diagnostics, proceed to TESTS W/O CODES - 3.0L article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).