so I found some write-ups and just read the codes on my '94 non-turbo.
I got:
1-1-3
1-3-1
5-1-2

thing is, only one of those codes shows up in the codes list I found, the 1-3-1
RPM sensor signal missing.
So, is that one serious, and how would I fix it...
and what are the other 2 codes???
These are from port A2

Thanx

 

upon further google searching (had to search for '94 model to find codes)
1-1-3 is "short term fuel trim, upper limit"
5-1-1 is "short term fuel trim, lower limit"

so, what do those mean? I feel like the car is down on power, is the computer limiting the fuel? Would seem odd as it uses alot of fuel!

 

LOL, upon further...further google searching (volvo code 1-1-3) I found an explanation that said O2 sensor or MAF sensor will cause both the 1-1-3 and 5-1-2 codes.
So if I understand it right, one of those is fualty and the computer is loading the engine with fuel in order to prevent a possible lean condition. This is basically a "safe mode", correct?
Considering there was a large exhaust leak before the O2 sensor, it could be reading wrong or could have become damaged. The exhaust system on a whole is clearly old and (if I were a rich man) I would replace the whole thing.

Anyone got a link to a proper front o2 sensor? I dont believe its the MAF cause the car idles well and I cleaned it with MAF cleaner.
I know that generic o2 sensors dont work (or at least have read that)

 

Bosch p/n 15097 Turbo, P/n 13373 non turbo no sas, P/n 13517 non turbo with sas. Available at FCP IPD, rockauto, Autozone, Napa, Advance ....

Bosch is what they came with.

 

Mines a non turbo...
but whats SAS and how do I know if I have it?

 

SAS = Supplemental Air System.

You would have an electric air pump that pumps air into the exhaust.

 

Can anyone point me in theright direction for how to read codes from the diagnostic port on a 95 850?

 

With a '95 you should have two options. The really easy one is to just take it to an oreilly or autozone and have them plug into your OBDII port on the center console. It's located under a little change holder.

The other option is the under hood diagnostic panel. You should have one ... not a guarantee. Besides engine codes you can also read and reset codes for all the systems on the car. That would include transmission, emissions, air bag, antilock, etc.
It's better than sliced bread and I only wish every car had been equipped with both.

Read this:http://www.matthewsvolvosite.com/read-codes-volvo-850

 

I had a code reader that i used on my '95 850 turbo.
It was only $50 or so on ebay.
But as was said, many big auto parts stores have a code reader and will get you the codes for free.

 

will the codes shown, and a possible bad o2 sensor cause my 12 MPG I am getting driving in town?