Stalling Problem
 

Hello everyone.
After getting little use over the lockdown period, I started using the car again. I have an 05 4.4 with the N62 engine.

Idling was a little rough but put that down to not being used often. After a couple of days, I noticed the car trying to stall whilst at junctions.
Eventually it did stall a few days in. Restarted straight away, but the following day it stalled, and threw the Transmission Failsafe Warning up.
Left it half hour & warning remained on, car then wouldn’t start.

Called out the RAC and upon their arrival just oven an hour later, the car started up right away.
He did the diagnostics and the following codes came up:-

Name: EOBD
DTC: P0347,Camshaft position (CMP) sensor A , bank 2 - low input
DTC: P0335,Crankshaft position (CKP) sensor - circuit malfunction
DTC: P0340,Camshaft position (CMP) sensor A , bank 1 - circuit malfunction
DTC: P0021,Camshaft position (CMP), intake/left/front , bank 2 - timing over-advanced / system performance.

I drove it half a mile to work, where it has since sat as I don’t want to drive it and risk it cutting out again.

Any ideas welcome before I get it taken to the garage for them to run tests?

How is the battery voltage?

vanos stuck?

Brand new battery put in a month prior to problems

Hope not 😞
Vanos system was rebuilt after failure back in 2017

Cam sensors are the usual culprits and more often than not you'll get the symptoms without having a simgle code.

Miles on engine?

Original CPS?

OEM grade CPS?

Only use OEM cam sensors or you will have mystery headaches. When mine and then wife's intake CPS failed, we had occasional codes but none were CPS related just random cylinder misfire etc.

108k on clock
I’m presuming the Indy put OEM sensors on when the Vanos was done. Crankshaft & Camshaft sensors were all replaced.

I’ll be taking it back to the same garage so they should know what they’ve used

Ween i did chain guide plus vanos refurbish on two m62s, we reused all the sensors.

We got cam related errors one of which was near identical to yours and confirmed with real-time tracking. We had a third motor we cannibalize for a replacement and the problems went away.

Slow responding vanos can also be oil pressure related and I've seen that issue go away when changing the oil filter on my wife's car and when I changed the oil filter cap on a client's car.

(The basket that holds the paper filter was no longer solidly fixed to the cap)

Thank you for your reply

BAD assumption. Shops will try and maximize their profit for a job. They will quote OEM prices for parts but use cheap crap.

Good point. They do have a very good reputation but I suppose it does happen

Stalling on a computer-controlled fuel injected engine is usually a result of the mixture. If I had to guess the CCV diaphragm is probably torn and unmetered air is entering the engine.

The only repair shop that I know that uses OE parts is at the dealership.

👍🏻👍🏻

How much gas is in the tank?

About half a tank

When my siphon tube o ring was going bad on the 2001 m54, I got similar codes. I believe the expert has been replying to this thread. Could that be a possibility here?

Not a siphon problem unless below about 1/3 tank also of you hit the limit the car won't drive away nicely. If you get a restart it'll stall again shortly after.

That's a strong declaration, Upallnight, but I think you're right looking back at the time I used to take my vehicles to Indy shops. I now do my own repairs and I use mostly OE parts except stuff like oxygen sensors and such.

Same here X5only. I spend a little more for Genuine BMW parts but I sleep a little better at night.

O2 I went though hell for over a year with non OEM, they are so easy to change pre cat I took a gamble on 1/4 the price. Not worth it get Bosch. I ended up cycling though knock off for all four on my X5. Wife's is overdue for changing them all out I will get bosch

You're right. My bad, in my mind I was differentiating between dealer (i.e. items stamped with BMW logo) and non-dealer O2 sensors but which are exactly the same and without the BMW logo on it. Yes, I did replace them on my 4.4 with Bosch 15682,15335, 17255, 17254. Got them from Fcpeuro due to their lifetime replacement warranty, meaning that when they need replacement next time, I get free O2 sensors and incur only shipping costs to/fro.