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Intermittent Charging System Failure message with B1087 code

Help, Advice, Owners' Discussion and DIY Tutorials on the third generation Volvo V70 wagon and XC70 crossover, and second generation S80. Are you an owner? Prospective owner? Get in here and join us! Start a new topic or comment on an existing thread.

2008-2016 V70
2008-2016 XC70
2007-2016 S80

Yak
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Joined: Fri Oct 18, 2019 8:46 am
Year and Model: 2010 XC70
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Yak

Intermittent Charging System Failure message with B1087 code

Post by Yak » Fri Oct 18, 2019 8:49 am

My wife's 2010 non-turbo has been intermittently showing warning lights and charging system failure messages. Yesterday it happened as I was returning home. I measured the voltage on the battery with the car running and the messages showing. Voltage was 13.8 . Every time this happens, I turn the car off and restart and it goes away. Battery shows 12.7 with car off. No issues starting, battery seems fine. It's also throwing a B1087 code, which is not well-defined.

Has anyone else seen this?



dasong
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Re: Intermittent Charging System Failure message with B1087 code

Post by dasong » Fri Oct 18, 2019 12:36 pm

Same thing happening with my 2010 XC70 (Charging System Failure, not the B1087 code).
Going to replace the alternator next week.



Yak
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Joined: Fri Oct 18, 2019 8:46 am
Year and Model: 2010 XC70
Location: Boston area
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Yak

Re: Intermittent Charging System Failure message with B1087 code

Post by Yak » Fri Oct 18, 2019 12:50 pm

Have you checked the voltage while the alert is active? I'm wondering why it's showing the alert yet the voltage seems to indicate that it is indeed charging.



dasong
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Re: Intermittent Charging System Failure message with B1087 code

Post by dasong » Fri Oct 18, 2019 12:53 pm

I haven't. But next time the message comes up, I'll check it.
On other forums people seemed to think that the charging was fine, just that the communication between the ECM and the modulator on the alternator was getting messed up.
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Yak



Yak
Posts: 3
Joined: Fri Oct 18, 2019 8:46 am
Year and Model: 2010 XC70
Location: Boston area
Has thanked: 1 time
Been thanked: 0
United States of America
Yak

Re: Intermittent Charging System Failure message with B1087 code

Post by Yak » Fri Oct 18, 2019 12:54 pm

Keep me posted on how the alternator replacement goes. Thx!



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