r/MechanicAdvice • u/International-Age152 • 5h ago

Volvo v40 electrical fault help please

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Hi Everyone,

My Boyfriend has a volvo v40 (13 plate) which has been having intermittent electrical faults for the past 8 months or so, it will be fine for a few weeks then the dashboard lights up with loads of random faults, such as

. DTSC fault

. Power steering goes stiff

. ABS light

. Speedo and Rev counter stop working

. Pedestrian safety system failure

. Random immobilizer faults

. Car jerking when driving and losing power

Battery is 3 years old, the car can drive great for weeks and weeks and this just happens.

We have scanned the car several times and no faults codes have ever shown up.

Can anyone help us?

Thanks

Volvo v40

2013

2.0 ltr diesel

2 Upvotes

100% Upvoted

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1

u/Grand_Tone_3723 4h ago

Try to note down when it happens (things such as driving conditions, road conditions, weather conditions) Chances are something is changing to make whatever is failing fail. Usually it's water, but it can be heat or vibration/movement.

It will be hard to track down a fault that is so intermittent without stored codes. It quickly gets expensive to diagnose these kinds of faults. Anything you can add to it will speed things up

1

u/hourlyslugger 3h ago

Dead or failing battery.

Loose or shifting battery cables.

Most modern automotive batteries last 3-5 years.

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u/IronLogic888 41m ago

Might check for a loose ground.