Trouble Codes
WARNING: This page is about a different car, the 1995 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
During QUICK TEST, diagnostic trouble codes are retrieved from PCM memory. See QUICK TEST for self-test procedures. These codes indicate faults are present at time of testing. A hard fault may cause Malfunction Indicator Light (MIL) to go on and remain on until fault is repaired. Codes may be cleared from PCM memory after they have been recorded or repaired. See CLEARING CODES.