My 99 nonturbo s70 is showing these codes. 109,000 miles. Automatic transmission. The car seems to be running and shifting fine but the codes will not clear except when you initially erase them.

What are potential causes for these codes?

A little background: Several years ago I had the abs module sent to one of the places that fixes the solder joints etc in the module, which fixed its associated problems. So I have no problems with that.

The ETM malfunctioned a couple of years ago. The car set up for about 2-3 years. I just had Xemodex rebuild my ETM and I just installed it. Now the car runs fine again. Xemodex said those two codes were transmission related.

As best as I recall, I did not have a check engine light before the ETM began to malfunction. So I'm wondering if it could have something to do with setting up. Should I have the transmission fluid changed? Thoughts?

 

The first code seems to be for a transmission output speed sensor. The second code seems like something VVT-related. If you haven't messed with the timing, you really shouldn't have an issue with the VVT unless the solenoid has gone out, but I don't think it will give off that code.
Check out post #6 in this thread: https://volvoforums.com/forum/volvo-s70-33/p1057-42190/

P0722 might point to the transmission speed sensor. This is what the part looks like: https://www.fcpeuro.com/products/vol...70-v70-9495008
I believe this is on top of the transmission, behind the PNP switch. Not 100% positive on that, though.

 

I had found that about vvt too. Apparently that is incorrect. My '99 does not have VVT. I've found a couple of references to it being a generic transmission fault code. The car is still running and driving fine.

Thank you. That post in the link looks helpful.

 

No problem!
That's right, '99 N/A models didn't have VVT. Ignore that part, I'd try what was mentioned in that thread.
If that P0722 is a generic transmission code, you may want to pull Volvo codes with VIDA. Easiest way to do that is to bring it to a Volvo shop or the dealer.
Also take a look at this thread: https://volvoforums.com/forum/volvo-...2-p1618-32697/
It talks about the ABS module throwing transmission codes. They could just be leftover codes from when you repaired your ABS module.