Need a diagnostic code lookup?
You can now get the definitions of Global OBD II (P0) and Enhanced OBD II (P1) Diagnostic Trouble Codes (DTCs) online. Select your vehicle and request the definition of your OBD II DTC. We in the 850 family who have 1996 and 1997 model years have it easy. Check Engine light comes on? We just plug in our code lookup readers and a magical system called OBD-II tells us what code(s) are causing the CE light. Same with 1998 model year Volvos, like S70, V70 and XC70 models. Then after that, the code lookup expanded from the OBD-II to include Volvo-specific codes that OBD-II readers cannot retrieve, although many overlap in meaning.
To start, the Ignition key must be in position II, engine not running. Open the hood. Locate the two diagnostic sockets just inboard of the washer fill cap. The “A” connector (shown above) has a jumper that is stored in the lid of the “A” diagnostic connector. The jumper is used for both diagnostic connectors.