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Rear axle sensor XC70 2011

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Old Nov 18th, 2019, 16:04   #1
Priory
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Default Rear axle sensor XC70 2011

I have scoured the forums and google and can't seem to find an answer.
Volvo XC70 D5 2011 AWD auto.
B104421 rear axle sensor, general signal failure, signal too low.
040086 invalid data received Bus signal message failure signal invalid

I have owned it now for 18 months and the headlight failure message ( bending lights) has been on for 12 months, I need the part no and location please.
Thanks for any help.
Paul
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Old Nov 21st, 2019, 18:22   #2
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As no one has replied, I'll give you an alternative thought that might be totally off base, if so, sorry.
You say you have a headlight issue, I had a issue on a P2 V70 2004AWD. The issue was the rear level sensor. Unless the "rear axle sensor" is only on P3 AWD I believe we could be talking the same thing.

Attached are two pics to help you locate the "sensor" I replaced.
You may have two sensors as the AWD R V70/S60 had or only one - as the other models in the v70 P2 range had.
Both images are looking towards the front of the car.

Good luck
Cheers
Bob
Attached Images
File Type: jpg Position sensor 01.jpg (142.9 KB, 15 views)
File Type: jpg Position sensor 02.jpg (233.9 KB, 16 views)
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Old Nov 30th, 2019, 17:01   #3
Priory
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Thanks Bob
Just had it serviced and had occasion to look underneath, your 2nd pic looks like the sensor on the rear axle so we are going to try replacing it and see what happens,
Regards,
Paul
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Old Dec 1st, 2019, 14:20   #4
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Quote:
Originally Posted by Priory View Post
Thanks Bob
Just had it serviced and had occasion to look underneath, your 2nd pic looks like the sensor on the rear axle so we are going to try replacing it and see what happens,
Regards,
Paul
Hi Paul,
Good luck with the repair, but I would not be more than 20% surprised, if having replaced the sensor, the fault code needs to be removed from "storage" to get the lights/messages back to normal. It could clear itself and all be ok, but usually, once error codes are reported/stored they have to be read/cleared to "fix" the problem.

Cheers
Bob
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