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11-26-2021, 04:48 AM | #1 |
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6HP19 fluctuating revs
Hi, I have an issue with my automatic transmission. The revs go up and down when I am going on a constant speed. Can anyone let me know please if it's a torque converter or mechatronics issue? or something else? Thanks
Here is what it looks like: |
01-17-2022, 03:59 AM | #3 |
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Scanned it and apart from exhaust back pressure sensor fault, nothing. My mechanic told me its a torque converter issue. Replaced it yesterday and the problem still exists
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01-18-2022, 06:27 AM | #4 |
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Just going to share some more details incase someone can help.
1- Car idles fine. No bouncy revs 2- Only happens under steady load (No acceleration or deceleration. Foot steady at the accelerator pedal) . When I accelerate, revs don't bounce and the TC does not slip 3- Does NOT happen when cold. Only when the engine is slightly warmed and so on 4 - Current faults are 1) 41BB-exhaust backpressure sensor and 2) 4A74-LIN/BSD Preheating control unit:Missing |
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02-13-2022, 07:10 AM | #5 |
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Drives: e92 328xi
Join Date: Jun 2009
Location: Orlando, Florida
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Might be a small vacuum leak, smoke test your car.
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