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George
George, BMW Technician
Category: BMW
Satisfied Customers: 1861
Experience:  BMW Master Technician over 20 years BMW Dealership Experience. BMW Auto Repair Shop Business Owner
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2004 BMW 745i: THE SERVICE ENGINE SOON LIGHT IS..CODES MEAN

Customer Question

I HAVE A 2004 BMW 745i. THE SERVICE ENGINE SOON LIGHT IS ON WITH CODES 272D, 272C, 27D5, 274E. WHAT DO THESE CODES MEAN AND WHAT CAN I REPLACE OR CHECK?
Submitted: 6 years ago.
Category: BMW
Expert:  bimmaster replied 6 years ago.
Hi, Do you have the fault code descriptions?
Customer: replied 6 years ago.
no i don't. there is also misfire codes for cylinder 1 &3.
Expert:  George replied 6 years ago.

Fault code 272c and 272d adaption additive, regulation limit reached bank # XXXXX

274e misfire detection, check sum

27d5 failure within the idle speed control.

Faults 272c,272d,274e are most commonly set due to bad crankcase vent valves, which there is a recall on these. Depending on the production date of your vehicle your vehicle might fall under the recall.

And if it does not this repair you can perform yourself.

Fault 27d5 can be set due to these fault codes for some reason, but 1st you will need to eliminate the other fault codes and see if this fault returns or not.

 

Defective Positive Crankcase Ventilation (PCV) valve from torn

membrane caused by chemical reaction of carbonyl compounds

(acetic and formic acid) in PCV gas stream. DTCs stored in ECM

and MIL illumination lead owner to seek repair. The damaged

membrane lets un-metered air into the intake system which drifts

the air/fuel ratio out of specified range so exhaust emission

standards. could be exceeded.

Remedy: BMW implemented a recall. An improved silicone

material is used in the PCV valve for production and repair kits.

The crankcase ventilation valves are replaced on both cylinder

banks of the affected vehicles using improved parts.

 

How to Install the BMW repair kit for Crank Case Vent Valves on BMW 745i

 

Click a picture to see a larger view.

 

 

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