All, I recently experienced the dreaded "Engine Malfunction" error that forces the car to run in a degraded performance mode [eg, no turbo]. I received the code twice in the past three days [cleared itself in between]. Both times were under hard acceleration. This leads me to believe core functions such as fuel/spark/air [as opposed to sensors].

I pulled the car in the garage and went through the magic nonsense to pull both the OBD codes and the "special" codes from Menu 14. Sadly, there are _no_ OBD codes. I even verified with a code reader from an auto shop. No OBD codes. However, there are four error codes from Menu 14.

They are as follows:
931B h
A559 h
931F
9314

Any thoughts on how to decode such things?

My plan is to pull the plugs in the morning and see if they're dirty or fouled. I only use 93 octane fuel from Shell, so I don't believe this is a fuel quality issue. I need to replace the air filter, which I'll also do tomorrow, but I can't see an air filter causing such havoc. Might be the high or low pressure fuel pumps. I hope its not the carbon build-up issues found on many R56's.

 

Quick update. I swapped plugs and the air filter this morning. The plugs were nasty and I believe original [NGK]. I drove for ~12 miles and added some fuel system cleaner. The code still remains.

I'm going to try disconnecting the battery, then reconnecting and see if the system resets.

At this point, I have no idea what's going on. I did, however, get a few of the codes decoded:

A559
Clamp 30g_f cutoff
Error will not cause a warning light
Error is not currently present
Test conditions have been completed
EXPLANATION: Pulled fuse out behind glovebox during tune install.
FIX: Make sure fuse is inserted. Clear and rescan.

931B = Open circuit in the ambient temperature sensor or in the wiring harness between the ambient temperature sensor and the instrument cluster


Found this post in an Italian forum:
http://www.clubminitalia.com/index.php?showtopic=25081

 

As an aside, the fault codes also correspond to:

931B h : 20002F5B8C00
A559 h : 20002F5B7502
931F : 20002F5B7708
9314 h : 2000368B7100

 

@ GorillaArms

i have same codes like yours,

A559 h
9314 h

there is not much info available on google. Do you mind to share your experience about how to fix these error codes?

thank you.

 

Anybody figure out the 9314 code? My 07 Cooper S has a terminal case of no turbo and now it's dying on the road and occasionally hard to start. No ODBC codes, though. A mini mechanic suggested the High Pressure fuel pump without looking at it.