Will correct with battery off for 24 hours(overnight), but randomly will start idling high at usually 3000rpm . no warning that fans are not running, although temp sense at zreo usually suggests no fans running. had idler control motor and temp sense replaced and fixed it for 4 months no worries, until today after work going home. cost me $980 aus to fix from a volvo dealer, and when a car plays up doing the same thing, theres nothing worse. being in electronic game, i would think the resetting and clearing the fault log in computer got the 4 months running o.k.
with a volvo diagnostic computer,and being an authorized dealer, i was confident that paying overpriced mechanic work would pay off, but no i'm a battling aussie that took a punt on european engineering, and lost
if any one could help, i will love you for ever more.
SOURCE: at various times all the warning lights go on/off
i HAD THE SAME EXACT PROBLEM WITH MY CAR. IT HAS BEEN AT THE DEALER FOR 2 MONTHS UNTIL THEY FIGURED OUT WHAT HAPPENED. WHAT WAS WRONG WITH IT WAS THE MAIN CONNECTOR THAT CONNECT THE COMPUTER AND ALL THE MODULES. iT WAS FILLED UP WITH SODA THAT I HAVE SPILLED INSIDE A CAN COUPLE OFTIMES WHICH CAUSED A ELECTRICAL BREAKOUT AND ALL THOSE WARNINGS POPPING UP AS WELL AS LIGHT BULBS MULTIPLE FAILURE AND ALL SORT OF ELECTRICAL ISSUES.
SOURCE: 1999 Volvo V70 Wagon Won't Start
Wow! I think u have some sort of record-4 years w/ check engine light on! Ok, 1st u need to have the battery checked. If u take it out u can bring it to an auto parts store where they will check it for free. Your radio may work, and your lights may go on, but u still can have a dead battery (not enough power to turn the engine over). So 1st thing to check is the battery and all the connections to and from it. Let me know how the battery checks out, then we can proceed to get your car running again.
SOURCE: 2001 volvo s60 t5 - performance reduced warning message, limp mode activated
I had exactly the same problem on my UK 2001 S60.
It was caused by the throttle control housing gaskets not being serviced properly and consequently the entire housing had to be replaced - not a cheap job -and a valuable lesson learned - use a reputable volvo specialist to service your volvo - I didn't and I learnt the hard why! only a volvo specilaist would have known about this I went to several other main street garages & none of them could even diagnose the problem let alone fix it. Although they did do numerous other things first before they gave up - ie replaced titanium spark plugs.
Before it stoppped running altogther and went into "limp home mode" there were tell-tale engine/throttle surges when the car was idle, but in gear.
It is now running "like new" & I will never get another garage to service it, as this could have been avoided - however they can also wear out after about 10years - so my bad services just made it happen sooner!
I hope this helps!
SOURCE: volvo s60 idle sensor
if you could get your hands on a scanner to read some live data it would help your plight,there is a cam position sensor when you take of the the plastic head cover at the timing belt end,did you check plugs,it also might help to clean the maf with some contact spray,sounds like plugs
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