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Old 04-11-2019, 08:25 AM
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P0011 Code 2001 X5 4.4 M62 V8 -New Owner-

Hey Guys,

A friend recently gave me an 01 X5 with 118,000 miles. I am the third owner, the first bought it new and had it serviced meticulously.

It runs great and everything works as it should except it the Service Engine light has been coming on for the P0011 code.

1. I swapped CPSs to see if code would show on other side and nope came right back to Bank 1.

2. It is quiet upon start up, but makes a very soft clug-clug-clug sound when hot.

I plan to check oil pan for plastic debris, what other things can I do to pinpoint the cause?

I am pretty decent with a wrench,(started on wrenching on 60's american cars) but my first bimmer might as well be a alien space craft.
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Old 04-11-2019, 09:05 AM
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You can use an inspection camera through the oil fill to check on the condition of the timing chain guides.

Their is a chance the timing is off from leaky vanos seal. The DIY Is not terrible and the kit for the seals is like $60 or so. (Get the spare seal I'm case it ends up being a practice one).

I developed a trick to get the seal in that turns it from an 8/10 to a 3/10 difficulty so check back if you determine that's the problem.

The concern I have in your case is the reading was dropping out. If that's not in the cps (didn't change sides when swapping) either it's wiring or in the DME or the DME is making an error deciding what to report (eg vanos changing faster than normally possible due to weak seal, DME reports out of range cam angle).

I found a thread on a 740 with same symptoms and vanos was the cure.
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Old 04-11-2019, 09:48 AM
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Thanks for your prompt reply. So far the oil filter is free of debris, next I will check pan and borescope oil filler to rule out cooked guides.

1. By leaky VANOS seal, you mean the sprocket thing?

2. DME=ECU or main computer correct?

3. By wiring in DME you mean a corroded or loose connection or bad capacitors in DME?

4. Can Vanos solenoid itself be causing this?

I'd rather not tear it down and throw parts at it, how would you go about diagnosing these?
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Old 04-11-2019, 09:58 AM
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The sprocket thing is the vanos unit.

DME is the main computer. Digital Motor Electronics.

Realtime reading of the cam angle with software and a laptop or I use foxwell NT510 will help root out what's going on.

Usually when the fault is within the cps, the primary symptom is the car will shut off on throttle off while driving slowly. Eg, coming into a parking spot the car will stall.

If the DME can't read the cam angle it will shut off the car to avoid self destruct. If the car keeps running but you get a code it's more likely to be something else.

Were it my car I'd swap vanos solinoids to see if the problem changes sides. A pressure problem from the solinoid for cause similar symptoms.

You can get a sense of chain guide health from tension on the chain through the oil fill port also when just shutting off the engine and it coasts to a stop, the tensioner drops to just the spring pressure and the chain will rattle if the guides are shot.
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Old 04-11-2019, 10:06 AM
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Ok, again car never stalls or misses etc so I am leaning toward VANOS. No shut off rattle.

1. Can Vanos/solenoid on either bank (right or left) cause the P0011 ? Or am I just concerned with bank 1 vanos (right/ U.S. passenger)?

2. Am I checking chain for tension or deflection through oil fill? How much is acceptable?

3. Cheap Scan tool showed timing varying from 11 degrees to 18.5 when idling warm. But it mostly stayed 12.5.13.5 with the occasional variation to 11-18.5 --Is this normal ? VVT engines are above my paygrade.
Thank you again!
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Old 04-11-2019, 10:23 AM
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The two banks should be similar. I don't remember how much change at idle. I have M54 engine and have watched the cam position over time while using cruise control and it's fairly predicable.
I would take a test drive and monitor with cruise. If you can plot a graph of both intake angle that would be very helpful. If one is more erratic that will help you track down the problem.
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Old 04-22-2019, 09:11 PM
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Quote:
Originally Posted by andrewwynn View Post
The two banks should be similar. I don't remember how much change at idle. I have M54 engine and have watched the cam position over time while using cruise control and it's fairly predicable.
I would take a test drive and monitor with cruise. If you can plot a graph of both intake angle that would be very helpful. If one is more erratic that will help you track down the problem.
O.K.

I pulled the lower pan and found no evidence of broken plastic; just a small amount of crumbly sludge particles hopefully.

Now I changed the oil which was very dirty and old, PO followed the 10-15K service interval...

Anyway, I went on to replace the passenger side VANOS solenoid (Bank 1) and as soon as I started it back up the P0011 code came back! (it had been gone for several driving cycles after clear)

1. What does this mean--Vanos seals?

2. Can driver side (Bank 2) Vanos solenoid trigger P0011 or does it only trigger P0021 ?

3. I noticed I could spin the metal interior part of the VANOS solenoid 360 degrees, that is if you held the coil housing part still, you could then spin the machined part with holes completely around(yellow). --Does this mean it was failed?
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Old 04-22-2019, 09:20 PM
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The vanos solinoids are radially symmetrical, it shouldn't matter if the innery part is rotated I thought I wrecked one when I tried to remove with a big slip joint pliers and the outer shell spun and spun.

Great news on the no plastic!

A few things will mess with the timing and give you that code but best bet: cam position sensor. You have four so you can do a lot of swapping to track an error.

"Passenger" side not meaningful on a world wide forum. That's right USA left UK and Australia. Use LEFT and RIGHT (of the CAR OF COURSE) Where YOUR left is has ZERO bearing on where the LEFT side of the car is. The fuel door is always on the RIGHT size regardless if you are facing it from the front and it's on YOUR left.
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Old 04-22-2019, 09:25 PM
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The M62 I worked on has either or both of those errors. Swapped some CPS from another M62 in the shop and problem vaporized. There's two power side and the error is a generic one that doesn't say intake or exhaust.

My first repair on my M54 was replacing the CPS on the intake. If that was my engine it would have been my first thing to do replace all four.

Use only OEM quality CPS. They are very very sensitive and perfection counts in this department.


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Old 04-22-2019, 09:43 PM
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Duly noted.

I was only aware of two CPSs--on the front of either bank just about vanos solenoid. I swapped the right side with the left a month ago to no avail.

My logic is that the P0011 code indicates a right side fault, so if it was only the sensor, then moving it to the left side would trigger the P0021 code, no?

Where are the other two CPS??

Thanks
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