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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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ABS light coming on when tank half emptyViews : 387 Replies : 5Users Viewing This Thread : |
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Apr 8th, 2024, 10:38 | #1 |
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ABS light coming on when tank half empty
2005 S80 D5 2.4 turbo auto
Seller is saying if the fuel gauge drops below half full the abs warning lamp comes on and the trip computer goes off and the heated seats stop working. But if keep tank above half full everything works fine. Any idea what this could be? Sounds a very peculiar fault. Why would fuel level trigger that? Any ideas or anybody heard of this before? |
Apr 8th, 2024, 17:33 | #3 |
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Apr 8th, 2024, 23:15 | #4 |
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I'm not convinced the tank itself moves sufficiently to trap wires. In any case, the problem occurs when the tank's contents lighten.
Could there be a short somewhere else that passes on a voltage change when the fuel level sender reaches a certain point?
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Apr 9th, 2024, 01:57 | #5 | |
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Thing with faults like this is wont fix itself and with ABS light may end up permanently on. Then car is junk for MOT purposes till it’s fixed. |
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Apr 9th, 2024, 10:36 | #6 |
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I don't pretend to be aware of how it all works but it does occur to me that the fuel gauge is part of the DIM which is known to be problematic
But then the failure symptoms are perhaps controlled by or at least passed though the CEM which is also a known weak point I would probably start by emailing Tilbury volvo diagnostics and asking them if they think there's any way a relay or dry joint etc could cause these issues. Seeing as an email is free and takes all of 5 minutes That is unless someone else comes along with a better idea Is it possible the cause and effects are not actually linked or do you fully trust the info to be logical and throughly tested There are some under seat connectors which could be more likely, would a yaw sensor for example if fitted affect abs when it fails (?) And obviously the seat heater connector would be in a similar place. But how that would relate to fuel level I don't know. Possibly just all coincidental and nothing to do with it None of this is based on 1st hand knowledge Last edited by stuart bowes; Apr 9th, 2024 at 10:41. |
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