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XC90 '02–'15 General Forum for the P2-platform XC90 model |
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XC90 accelerating by itselfViews : 3216 Replies : 18Users Viewing This Thread : |
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Mar 28th, 2015, 22:19 | #1 |
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XC90 accelerating by itself
Does anyone know of any faults which could result in my XC90 accelerating by itself? It's a 2011 D5 200 Active with Auto box, and in immaculate condition with around 22000 miles on the clock. We had problems a few months ago with the DPF warning coming on which wouldn't clear. Around this time there were a couple of occasions where the car accelerated by itself with my wife battling to hold it back using the brakes. The dealer did a forced regen to clear the DPF and after I picked it up, on the way home, it started accelerating again. It was a nightmare trying to control it in busy traffic, and I had to brake fairly hard to hold it back. Got an engine service warning at the same time. When I put it into neutral the engine was revving up and down by itself. I turned the engine off and on but it was the same, eventually it stopped and I managed to drive home in limp mode. Went back to the dealer who replaced a couple of sensors, and that seemed to sort it.
That was a few months ago and I thought it was all fixed but today when driving it started accelerating by itself again. Changing from neutral back to drive seemed to get rid of it and there were no warning messages this time. Not had any DPF problems recently either. Any ideas what this could be? My wife doesn't feel safe driving this car any more and if I can't get this sorted the car will have to go, which would be a shame as its a nice car! Thanks. Last edited by Daveboy; Mar 28th, 2015 at 22:22. Reason: Typo |
Mar 28th, 2015, 22:26 | #2 |
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Sounds terrifying and I'd have it back to the dealership to sort it once and for all or report to Volvo UK or the DVSA https://www.gov.uk/report-vehicle-safety-defect
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Mar 28th, 2015, 22:31 | #3 | |
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what happened when you put it in " N " I would guess the revs went sky high ?
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Mar 28th, 2015, 22:37 | #4 |
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Haven't checked the oil level, will have a look tomorrow. It should be ok as the car still gets serviced at dealer, and when it goes in for anything else they (supposedly) check all the fluid levels. When I changed it in to neutral the revs did shoot up but I put it back into drive quite quickly. When this happened before and I put it in to neutral the revs did shoot up but it was revving up and down consistently by itself.
Last edited by Daveboy; Mar 28th, 2015 at 23:17. |
Mar 28th, 2015, 22:53 | #5 | |
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Mar 28th, 2015, 23:01 | #6 |
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No haven't had any smoke, but I'll check the oil level in the morning and report back. Thanks.
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Mar 29th, 2015, 08:57 | #7 |
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It does sound like the symptoms of a runaway diesel, but if that were the case i'd have expected the engine to have eaten itself by now!
If the oil level is anywhere above 2/3rd full, then this is where id be starting. Total crap if the dealer hasnt picked up on it (if thats the case), as the rising oil levels on the euro4 D5 are widely known and the 2/3 oil solution is an official Volvo fix.
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Mar 29th, 2015, 10:30 | #8 | |
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If it happens again - shove it into Neutral and turn the engine off immediately by turning the key to position "I" so the steering doesn't lock - if the engine stops then I think you have an issue with engine management/fuel injection system. If the engine continues to surge then you have problem with the turbo leaking lubricating oil into the inlet tract or too much oil as Clan suggested. If you choose to do this - take great care as if the engine does stop you will have no power assistance with the steering or brakes... probably best to stop the car first. Personally I would send the car back to the dealer (assuming you still have some warranty) and refuse to take it back. It must have been a very frightening experience for your wife, and there is always the risk that if it happens again it could have "front page of the nationals" consequences. I'm not a lawyer but I would be mindful of my own risk and liability, driving a car with an unresolved fault that can cause sudden, un-commanded acceleration. As Bobdabuilda said get straight on to Volvo - surely a manufacturer who leads the way in safety will jump on this? If they don't - don't be shy about threatening to call Watchdog... |
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Mar 29th, 2015, 10:33 | #9 |
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Your car needs to go in to the Dealer immediately and don't accept it back until it's fixed. That issue has the potential to kill someone.
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Mar 29th, 2015, 18:07 | #10 |
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Checked the oil level today. The level is 3/4 of the way up the XXXX... section. i.e. it is sitting between the 2nd and 3rd X from the top. I'm guessing this is ok?
I'm going to get on the phone to Volvo customer service in the morning, and probably submit a report to the DVSA. |
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