'92 940 turbo
the check engine light came on and i went to the little black boxes and got the following as codes
A1- NO PLUG THERE
A2- 1-1-3
A3- NO PLUG
A4- NO PLUG
A6- 2-1-4

Now in the "B" box
B2- 1-2-2

now my problem is where to go from here
any help would be greatly appreciated

thank you guys for the info
it seems the best choice for me is to replace the o2 sensor and see where that goes
as far as the RPM sensor-or as Volvo refers to it the "timing pickup"
i'll just have to get into that too tomorrow
as i have had 2 cars in my lifrtime succumb to electric ghosts i'm hoping to get away with replacing these parts rather than find a bad connection or loose wire somewhere
wish me luck and thanks again

good luck to you. in what i thought was an oxygen senson now looks like a air mass meter problem in brick. i hope to get that replaced out tomorrow. but those ghosts can be awful to track down.

-ross

http://brickboard.com/FAQ/700-900/EngineOBDCodes.htm

that will give you a full list for future reference.

-ross

Here are your answers....Someone else back me up

Plug A2 - Fuek Trim too Lean or Rich(Poor Mix by Injectors or O2 Sensor Fault)
(Fuel Injection)
Plug A6 - RPM Sensor Fault/Failure
(Ignition)
Plug B2 - No Speed Signal for Cruise Control
(Cruise Control)