Got a slight problem---It seems that the car has lost its pep and also developed a rather ugly knock. It also idles high in park after driving and sometimes when you start it. It has a slight hesitation and won't go over 45 mph.
Check engine light lead me to the OBD codes 232 & 113 (O2 sensor and faulty injector)
I think it could also be water in the fuel (changed where i normally fill up)
Any help would be appreciated---thanks

John

O2 sensor sometimes goes with faulty injector. If one injector is stuck open, you'll get a rich condition and possibly a big knock out of that cylinder.

Try disconnecting each injector one at a time and see if the knock stops. The 02 sensor might have been ruined by a rich mixture.

Or a lean one. The 232 is one of the "rich or lean" mixture codes if I remember off the top of my head. Again, try disconnecting the injector wires one by one and see if the condition changes. If there is no change on one particular cylinder, you have a nonfunctional injector.

Be careful not to lose the inner rubber seals on the injector harnesses. They sometimes fall out, and can cause an intermittent fault in that particular injector after that.

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Chris Herbst
1992 945, 71k
Volvo shop tech