Retrieving Codes

Locate diagnostic unit behind left strut tower, and remove its cover. Connect selector cable to socket No. 2. Turn ignition switch to ON position. Enter control function No. 1 (retrieving codes) by pressing push button one time for at least one second and no more than 3 seconds.
Watch Red LED, and count number of flashes in 3-flash series. Flash series are separated by 3-second intervals. See Fig 1 . Note all codes. Only 3 separate codes can be stored at once. If no codes are stored, LED will flash 1-1-1, indicating fuel system is operating properly.

Fig 1: Counting Red LED Code Flashes For Code 2-1-3
Courtesy of VOLVO CARS OF NORTH AMERICA.
If a fault code is received, see FUEL INJECTION FAULT CODES table. Depress push button again, and check for additional codes. Depress push button a third time if necessary. If first code repeats, no other codes are present.
Diagnostic system memory is full when 3 codes are present. Those codes must be repaired before further codes can be retrieved.

NOTE: Not all codes listed in FUEL INJECTION FAULT CODES table are used on every vehicle.