Question about 1999 Volvo V70

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1999 Volvo XC Check Engine for 7 years

Don't know where to start on my 1999 volvo xc. The Check Engine light has been on for 7 years now with many, many trips to the dealer to replace parts over and over, including new transmission. Software has been updated as per recall. I finally took over and started replacing parts. Replacing the altitude sensor seemed to make a lot of difference but still Check Engine comes on, mostly when hot, > 60 deg. I can get it to turn off as long as I don't let the engine get too hot and make only short trips. I just replaced the abs controller as I'm seeing many online posts indicating this type of issue due to heat with this unit. Problem is now worse. The dealer has told me both that the software needs updating with the new abs and that it doesn't. I'm guessing not as the car runs about the same only a little worse. I believe I also need a new oxygen sensor which has already been replaced twice.

Now, latest wrinkle. I decided to try to put a heat shield in front of the abs in case it is a heat issue. When pushing tin foil across the engine, started getting sparks flying everywhere. Pulled it out and tried again, same result. There's no bare wires or connectors I can see, the engine was off and the abs fuse was removed at the time.

Any ideas? Is the front oxygen sensor right below the air cleaner hose and abs controller? I'm wondering if it's shorted and that's causing both issues?

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  • cattecgr Oct 12, 2008

    check engine ligth on some times ABS and traction control lights are on


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Turns out that replace the abs module (2nd time) and the front oxygen sensor (3rd time) has fixed the issue for now. When I see problems all over the place I'm inclined to believe it's the software being too sensitive...anyway never again will I buy Volvo.

Posted on Oct 22, 2008

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After much reserch find out that the abs is the culprit,acording to the volvo expert I found on the web the abs on newer volvos fail after 30.000 miles very unusual they last pass 60.000 miles (my wagon has 118.000)easy miles,when the abs and traction ligths sudenly are on the car pick up speed.The abs repair site is purchased this wagon from a volvo dealer one year old 4.000 miles,is been nothing but nickel and dime problems,the SRS ligth on at 72.000 wants $ 2.300 for repairs,there is a recall for throttle,dealer wants usual $105.00 for diagnostic and then they would tell me the DEAL OR NOT DEAL amount.The money I pay the dealer just for diagnostics is alot more for what I pay for a Honda for my daughter first car (a 2001}almost run around the clock seems like never has a chance to cool off $0 on repairs lots of oil changes.This volvo replaced a 1984 Mercedes wagon 230000 plus mls.0 problems.I will repair this car and sell it and never again volvo,my wife drives a Mercedes and this car is in the shop only for service and annual inspections.

Posted on Oct 19, 2008

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Consider disconnecting your check engine light, and fixing things that actually break.  Okay, well at least concede it is not the engine, the engines in these cars are very good.  My experience with my v70 has been that the light is on more than it is off, and it is usually something trivial-- a tail light bulb, a thermostat (have you tried that?).
In the case of the thermostat three different shops charged 100 to check the computer, shrugged and suggested a new transmission, new catalytic converter, selling the car -- although the transmission appeared fine on the computer. The car had been overheating, and the transmission which overheated due to this malfunctioned in hot weather too.  Before selling I quizzed friends and non-volvo mechanics about the overheating problem.  I bought a thermostat, the guy showed me how to put it in, flushed coolant and voila, the engine light went off, the transmission works flawlessly.  The check engine light went back on because the tail light went out, replaced it, light went back off.  The car has such a bad rap people assume the worst.  Beware of the dealerships and mechanic shops, they want to sell you stuff.

Posted on Oct 18, 2008

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Try not to take a volvo to a main dealer as its proberbly worked on buy an apprentice or a technician whom is being screwed on his wages and doesnt care (look for specialists / independent and not the one in berkshire called volvotech) i've heard he rips people off and doesn't care either

Posted on Dec 11, 2008

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