roscoe

Borrowed from Bentley Publishers and confirmed through personal experience.

Location is the passenger side of the 2005 E60.

Fault codes stored in vehicle
P2187 (29EF) Fuel mixture adaptation, sum check error

P2189 (29F0) Fuel mixture adaptation 2, sum check error

29E7 Fuel mixture adaptation, idling, per time unit

29E8 Fuel mixture adaptation 2, idling, per time unit

After a control unit interrogation using a BMW scan tool, we located high additive (5.0 both banks) numbers. The multiplicative numbers were great, both around 1.0.

High additive numbers indicate a problem at idle.

Since the engine was hot (at operating temperature) we chose not to perform a smoke leak test but connected our monometer (Slack Tube Tester), the crankcase vacuum was very high, (off the scale). We disconnected both vacuum vent valves on top of the valve covers and blocked the vacuum pipes to the throttle body eventually determining bank #1 to be the cause. We removed the suspect faulty bank #1 vacuum vent valve, it was torn (arrow).

You can buy just the vacuum vent valves (repair kit) PN 11.12.7.547.058 separately (low cost) from BMW. Now the crankcase vacuum reading is normal at around 7.75" of water.

We watched the additive numbers recover, reset the fault codes and then test drove the vehicle resetting the fuel trim adaptations.
After replacing the parts we test drove the vehicle and monitored Additive fuel trim. The numbers started to return to normal (0.1). Then we cleared fault codes and reset fuel trim adaptations.

My link 1

My link 2

Ozi5Msport

Nice write up.
Wanted to know where you got the "P" number to (HEX) conversions from ? I am after engine and body fault codes ?
EG I get
CAS -> IM message 9A 0F/28 from my Chinese copy of Dash 2.1.0 which in INPA is
Error code: 9A 0F 28 02 2B F9 2B FB
Thanks for any assistance

Steffi

Thank you for this post. I have the same two alarms.
I ordered part number (2X) #BMW PCV Valve - Bosch 11127547058

I was replacing both PCV Valve's today but the new plastic cover came without the vacuum hose connector, so I had to reuse the old black plastic cover. I researched the PCV kit from other vendors and realized that product pictures are arbitrarily shown with or without the little round hose connector and are sold under the very same part number. Does anyone know how to differentiate the part number so the next time anyone repeats this procedure they will be able to order the correct parts?

For my 2005 BMW 545i I needed the version with the black vacuum hose attachment but received the one as shown in the second picture (see below). No big deal, because I used the old black cover, however I would have liked to replace all the parts that came with the kit, because the black plastic part may become brittle as well. (like the orange piece when I tried to clean it, it simply teared into two pieces under no force)

Either way, be careful not to break any of the six plastic latches from the old cover (just in case you have to re-use it)

This shows the Valve kit with the black hose connector


This shows the Valve without the little black hose connector (see at the bottom of the picture, it is cut off)

slicknick

I had this same problem along with the crank case hoses which were so brittle they were literally falling apart. This caused my valve cover gasket to leak too. I followed the directions in this video for the hoses.