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Discussion Starter #1
Been on Bimmerforums and posted threads, but thought I'd create one here.

From time to time, the E46 cuts out when driving. Sometimes it's just a moment, but the car jumps a little bit and then comes back. It's almost seamless driving.

It also happened once when it was idle. It juddered and tried to stay on, but switched off. The battery light comes on, a bleep emits and then sometimes the engine management light and engine exclamation mark light comes on. Sometimes the airbag.

These lights also come on after it does this in movement. However, these lights always go off, or go off once I've stopped and started up again.

I've noticed in the last few days one of the reasons why it does cut out (but not the actual fault reason).

Driving along the motorway, on a slight incline. Doing around 50/60 and around 2,800 revs in 5th gear, before easing off the gas pedal to reduce my MPG dial to around 45/50.

That's when it switches off and back on a couple of times. The battery light flashes and then I have the warning yellow light and the engine light. These then tend to stay on, but sometimes they go off.

Is this a fuel filter issue? It seems that if the car is on a hill the fuel might be cutting out, causing this problem - or it's a sensor issue.

In any event, I got the car this June, so taking it back to the dealer to investigate.

Looking online, it seems to be a regular problem and the camshaft and crank sensor need looking at.
 

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Any codes?

Electrical issues come to mind. Check the ground strap that's on the right side of the engine under the exhaust manifold. A poor ground/earth connection will cause the engine to act funky.
 

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Discussion Starter #3
I'm taking the car back to the place I got it to get it diagnosed. I'll suggest they look at the grounding as well. Will keep you posted.
 

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You could have a loose wire. Tighten ALL +12volt leads from the battery to the +B terminal to the starter and then the alternator.

Tell us what your specific battery voltage is and what voltage your alternator is putting out when running.


.
 

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Discussion Starter #6
Took it there and they said nothing comes up on the computer, no errors or anything. They also drove around for a while and no issues (or they are trying to pull a fast one).
 

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Discussion Starter #7
It cut out three times today. Finally managed to get a code on my ELM 327 device:

Read defects
1 Pending DTC
1 Stored DTC

P0015: B Camshaft Position - Timing Over-Retarded(P)

P0335: Crankshaft Position Sensor A Circuit(S)
 

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Discussion Starter #8
Now two more codes:

P0011: A Camshaft Position: Timing Over Retarded (P)
P0368: Camshaft Position Sensor B Circuit High(S)

I replaced the Camshaft Sensor yesterday after three major stops on the motorway. It still stops, but not as critical.
 

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Discussion Starter #9
Fixed. It was the crankshaft sensor. Had it running for a few days now and no problems showing. The garage (independent) noted that oil was leaking into the electrical connection of the crank sensor. The camshaft sensor was also replaced first, but didn't make a difference; only the crank one did. Not sure if it's just the way I drive now (more settled and not pushing the pedal as I thought that was one of the issues it was cutting out), but it seems a little more fuel efficient.

Had £40 in yesterday and dial showed 316/320 to next refuel for a quite a while.
 

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aha okei paji
do you too drive 316ti??
i want to ask exhaust camshaft position sensor and intake camshaft position sensor are same in this motor?? and where does camshaft position sensor located??
will be very thankful ..
 
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