2021 Volvo V90 B4. Damaged rear end in the accident. Repaired in a garage but now keep showing rear auto breaks reduced function. Parking assist malfunction. Changed rear sensors and harness. Still showing this. Only found out the 48V mild hybrid battery is completely 0 power. Turned on the engine, and charged as normal. However, the power is losing very fast as soon as turning off engine. Testing showing some some ground circuits issues. Please help to point a direction. Is the battery damaged in the accident, or the alternator is damaged? Or just some cables are incorrectly connected?
Urgent help pls… parking assist malfunction, 48v Mild hybrid losing power super fast. Rear auto break reduced function
Michaelvolvo
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2021 Volvo V90 B4. Damaged rear end in the accident. Repaired in a garage but now keep showing rear auto breaks reduced function. Parking assist malfunction. Changed rear sensors and harness. Still showing this. Only found out the 48V mild hybrid battery is completely 0 power. Turned on the engine, and charged as normal. However, the power is losing very fast as soon as turning off engine. Testing showing some some ground circuits issues. Please help to point a direction. Is the battery damaged in the accident, or the alternator is damaged? Or just some cables are incorrectly connected?
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If I were you:
Take it to a Volvo dealer. It's your best bet to find out what's really wrong and what the repairs would be (insurance??).
No one on this forum will be able to tell you what's wrong or where to start looking. Don't waste your time. good luck!
Take it to a Volvo dealer. It's your best bet to find out what's really wrong and what the repairs would be (insurance??).
No one on this forum will be able to tell you what's wrong or where to start looking. Don't waste your time. good luck!
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3,240 Posts
Yes, this car needs to go to a Volvo dealer because most likely it's screwed up one of the modules in the car.
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I spent 2k already in one dealer. They couldn’t locate the problems. And quoted me another 4K to change some back bumpers and sensors but not guarantee solving the problems. They didn’t even notice the mild hybrid battery was not working properly. I lost confidence with them. May try another local Volvo specialist.
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I might become a Volvo specialist after fixing this car. Hopefully it can be fixed. …thanks for your comments anyway.
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