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10-06-2016, 09:28 PM | #1 |
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Rough Idle
After turning on my car and driving 100 feet i started to get a very rough idle fluctuating between 400-1000rpm. The car felt like it was about to stall every time it dropped so i shut the car off and turned it back on(problem went away). I'm guessing it has to do with the idle control valve.
Fault code: "CDBE Idling speed control valve CAN message bank 2" I read on a different post that cleaning the valve and replacing hoses should be the solution. If anyone has different information pm me or reply below. If i have to replace the valve, which valve is recommended. There is OEM (400$) and the Standard motor idle valve (210$). Car is 2011 m3 with 21k miles. Last edited by opihi5; 10-06-2016 at 09:51 PM.. |
10-07-2016, 12:20 AM | #3 |
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10-08-2016, 12:03 PM | #4 | |
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10-08-2016, 01:57 PM | #5 | |
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10-08-2016, 02:31 PM | #6 |
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I had a slight rough idle that I lived with for a year. The RPM's dipped ~50 intermittently and the car would shake a little. A couple of weeks ago, she went into limp mode. Ended up being my Vacuum break booster, she finally gave up the ghost. Idle is smooth as butter now, rock solid, no fluctuations.
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10-09-2016, 01:46 AM | #7 |
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I have this issue right after I fill my tank. Luckily, my car is still under warranty right now. My car is at BMW right now to get this looked at yet again. Any idea what it is?
First time I brought it in they said it was an anomaly. Second time it finally died and they replaced the idle control valve. Now it's in and going to get checked Monday.
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10-09-2016, 09:18 AM | #8 | |
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10-09-2016, 09:31 AM | #9 |
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Wouldn't that be nice? The answer is no unfortunately, this warranty extension is for a different part then the throttle actuators.
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10-09-2016, 11:50 AM | #10 | |
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10-09-2016, 02:00 PM | #11 | |
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10-09-2016, 09:48 PM | #12 |
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Yes, unfortunately. Wait until you get the codes again though and maybe they will fix it in only one visit. The warranty was extended to 10 years/120,000 miles so you have time.
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10-10-2016, 11:06 AM | #13 |
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Well at least I know I won't have to spend money on it. A cold start delete got rid of the problem for now.
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