FixVault

Section 4 (Engine Controls - Basic Testing - 4-CYL): Summary

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If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed to TESTS W/CODES article. If no hard diagnostic trouble codes are found in self-diagnostics, proceed to H -TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.