There was a software update for this car, #30646691 to solve certain transmission issues. Not sure if that's the upgrade you were referring to. Also, the have been several cases of a dirty or partially plugged valve body in the transmission causing similar issues.
Hope this helps.
SOURCE: I have occasionally noticed a
Does your RPM's dip from about 1,000 to just a tad below 500?
If so...try cleaning out your throttle.
Be sure not to spray throttle cleaner directly into the throttle, but on a rag and wipe away. Use something to hold the throttle plate open and use a small brass brush, dip into the throttle cleaning solution, and start to scrub away some of the built up soot.
Afterwards, wipe it down till you see a rather shiny throttle.
SOURCE: Volvo S60 sensor ?
Sounds like an oxygen sensor (there are two). I had a recent problem where I had a rough idle and my S60 continued to stall out. Turned out to be the rear oxygen sensor. After replacement, car idles nicely and car drives normally.
SOURCE: i have a 2004 s60 and today i stopped at a red
Check the transmission fluid level.
It may be the problem.
SOURCE: Hi... I have a s60 T5 geartronic 2003 Volvo. I
hi, im having the same problem with my volvo transmission. I just wanted to know what u had to do to fix the problem? thankyou
SOURCE: 2002 Volvo v70-Transmission is shifting hard in lower gears
Find a transmission servicer that is not afraid of tackling a Volvo problem. This is probably why the car was for sale in the first place. Good luck!
Throttle Body Cleaning on vehicles without electronic throttle control (most 2003 and down)
You can in most cases repair this slow speed stall or unstable idle by cleaning the engine throttle valve and the idle speed control valve using a product called CRC Spray Throttle valve cleaner. Spray the cleaner into the air intake of the engine with the hose removed from the throttle body, the engine will try to stall so hold up the idle speed manually. Once you have used up about 1/2 can of the cleaner stall the engine out while spraying and turn the key off, disconnect the negative battery cable for 5 minutes and then reconnect and drive the car for a about 25 miles of varied driving modes. If this doesn't cure the problem you may need the fuel injectors professionally cleaned by the dealer service dept.
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