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2010 2011 BMW 5 Series Forum F10 F11 8sp Auto box problem |
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06-03-2020, 05:46 PM | #1 |
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F11 8sp Auto box problem
Hi all.
I'm hoping someone can help me. Every so often my car goes into limp home mode and flashes up with Transmission Failiure and DSC fail. When I turn the car off and restart it it then clears and I can drive as normal. The car is a 2010 with 120k and I'm unsure if it has ever had a gearbox service. I'm going to pressume it hasnt. I have the codes which I will add them below. Im wondering if anyone has had these codes before? Is my gearbox toast because it drives perfectly apart from the odd time it does this. Could a service sort this out or am I wasting my money and just invest in a reconditioned box?? Codes are : 420021 & 420022 Electronic pressure control valve B Short circuit to positive Intermittent 420531 Power supply output stage Short circuit to positive Permanent Thanks in advance everyone |
06-04-2020, 01:21 PM | #2 |
Brigadier General
1983
Rep 3,216
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Find an independent gearbox specialist and ask their opinion
Even if they charge £100 to have a look and do their own full diagnostics, it will almost certainly be money well spent. |
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