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2010 2011 BMW 5 Series Forum F10 Help! N55 mixture adaptation code 101F01 |
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10-21-2023, 08:36 AM | #23 |
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Hi All,
Thought I'd post an update as I've recently fixed a misfire on cylinder 6 and 101F01 fault codes. Only really noticeable when warm similar to the OP's symptoms where after a Valvetronic run in procedure, the symptoms disappear. The issue turned out to be a very badly worn inlet camshaft. The cam lobes on cylinder 6 had pitted and had worn unevenly creating a 400um slope on the cam lobe. I guess at full valve lift, the reduced lift from the worn camshaft is much less noticeable. Fitted a new inlet cam and the problem has gone away. Not sure of the root cause but checked all oil passageways and there didn't seem to be a blockage. Could be a manufacturing fault with the original cam - who knows. Hopefully this helps anyone out who has a persistent slight misfire. |
Appreciate
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