I recently had a bunch of work on the s80 and think some of it might be causing obd codes reactions.
I had a section of the wiring harness replaced, new rotors and pads, flame box, turbo intake hose.
To reroute the wiring harness several things were jacked around.
Codes now showing up are Mass air sensor, ABS module, anti theft siren. To top it off, transmission service required warning on display ( popped up on the way to buy for sale signs) I think the ABS could be related to filings on sensors from new pads dragging, Mass air may be related to the hose change out and jacking stuff around.
Tried a panic stop on wet pavement , indeed the ABS doesn't work, it broke loose.
Tranny seems to not shift up as before.( could it be due to the Mass air problem. also the car sat for 3 weeks since buying the 2007 and has never been still more than 8 hrs in the last ten years.
Or do I just have a bunch of broken stuff on a 200K car?
I'm running a scan on the OBD with a pocketscan tonight. Will post results. Possibly erase and see if they come back.
Any ideas?
I really need to get the car in sellable condition as I have 4 Vo's in the fleet 06 XC90, 2 S80's ( '99 t6 and '07 3.2), '99 s70 AWD and 2 PKUP's. I think the 1999 S80 would make a great kids school car. It still sits and drives better than anything I've ever owned. I just can't sink more money into it.

A couple of years ago I did an evaporator replacement on my 850 and had multiple seemingly unrelated codes afterward. I found I had not reseated one of the underdash wiring connectors fully. Codes never came back once the connector was snapped in.

Just a thought, since you had work done where wiring harnesses were most likely disconnected then put back.

I agree, the ABS module has died and needs to be repaired. Not a dealer option, they only replace at $$$ cost. Depending on where you live, Vic is in California: http://home.earthlink.net/~vicrocha/
Or google abs repair for some east coast shops.

The O2 sensor could be a wiring issue, check the wires before replacing it. Bank 2 is the driver's side.

The Mass air flow sensor could be a left over message, so clear it and wait for it to come back again.

Wash, wax, and clean the insides before taking pics for selling.

Klaus
--
The more I learn, the more I forget. So why learn?

The codes were :
P0722 output speed sensor no signal
P1152 not available
P0160 02 sensor no activity ( bank 2 sensor 2)
P1618 not available

Can anyone translate especially the not available?
I erased and will see if they come right back after driving.

I think you've got multiple problems. ABS problem is not related to recent work. Vehicle speed signal is a give away. I'd suspect that the module has crapped out. This will also effect the way the transmission shifts, as it gets info from the ABS module and its knowledge of the vehicle speed and adjusts shifts accordingly.

Oxygen sensor code is a real bummer on this model. I'm not too familiar with "PO" codes, more familiar with Volvo specific codes. If the sensor is indeed dead, you may be in the market for ALL FOUR oxygen sensors. They work in concert and, more often than not, when only one is replaced, the other three soon start to post up codes. Better (relative term) to do all at once. Expect to pay over $1000 for correct sensors installed.

Good move to sell. Honestly, I wouldn't wish a 1999 twin turbo S80 with 200K on my worst enemy. And sitting around doesn't help, either. Good luck.

The service guy at Volvo says O2 codes refer in this case to the mass air sensor which may just need cleaning. What do you think?