Low battery warning

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04-26-2018, 07:32 AM

Kfeodorovici

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Low battery warning

Hi,
When I start the engine at my S40 Volvo the tension in the battery is low around 11-12 and after few seconds it jumps back to normal 14. I get the low battery warning, but the battery is OK, what is the problem?

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04-26-2018, 07:45 PM

mt6127

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try cleaning and tightening the posts. and check the cables for any signs of blistered insulation (corrosion = resistance = heat = blistered insulation...)

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04-30-2018, 12:43 AM

Hudini

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Alternator may be on the way out.

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05-02-2018, 08:44 PM

difflock54

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Yes, symptomatic of an alternator problem or the alternator clutch pulley beginning to fail. When mine failed I did not even get a battery warning light on the dashboard.

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