Retrieving Diagnostic Trouble Codes
DTCs are retrieved using a Tech 2 or other OBD-II compatible scan tool connected to a 16-pin Data Link Connector (DLC). See Fig 1. DLC is located below left side of instrument panel, accessible from driver's side. Follow scan tool manufacturer's instructions when retrieving DTCs. Diagnose DTCs according to there chronological order. If a chronological order can not be established, diagnose DTCs testing DTC P0171 and P0172 first, DTC P0300-P0304 next and DTC P0400 last.