Hey community,

I have been through a tough time with my Mini One R56 N12B14 and it doesn't end.
Timing chain, both O2 sensors, Thermostat housing with thermostat and valve stem seals already have been changed.

I have changed my catalytic converter and the oil filter housing gasket and right after that my car had three error codes, any idea?

0x276A DFES_DTCM.DFC_KATmin_C - catalyst conversion

Error rate: 1
Logistics counter: 38

Mileage 142,470 km
Lambda actual value (lamsoni_w) 1.00 -
Exhaust gas mass flow without fuel component (msaovhk_w) 67.20 kg / h
Oxygen storage capacity of the catalyst (oscdkta_w) 88.00 mg
Exhaust gas temperature behind Kat (tanhkm_w) 662.85 degrees C

Catalytic converter efficiency too low
Test conditions met
Error currently present and already saved
Failure would cause a warning lamp to light up
Diagnosis active
-
-
-
-
-

Error code: 27 6A E2 01 00 00 01 26 37 A7 10 15 2C 9C 2E 07
AF FF 00 94 2E 13 AF FF 00 A7
-------------------------------------------------- -----------------------------

0x2B67 DFES_DTCM.DFC_MSLAMmax_C - air mass flow, plausibility

Error rate: 1
Logistics counter: 40

Mileage 142,500 km
Speed ​​(nmot) 760.00 rpm
Intake air temperature (tans) 36.00 degrees C
Throttle valve angle based on lower stop (wdkba) 8.63% DK
Period duration for mass flow from HFM (tpmshfm_w) 51.20 us

Value too high
Test conditions met
Error currently present and already saved
Failure would cause a warning lamp to light up
Diagnosis active
-
-
-
-
-

Error code: 2B 67 E1 01 00 00 01 28 37 AA 13 70 16 02 2D F8
AF FF 00 94 2D FD AF FF 00 A5
-------------------------------------------------- -----------------------------

0x2AC3 DFES_DTCM.DFC_PLLSUnpl_C - Lambda probe in front of the catalytic converter, plausibility

P2195 Lambda probe (bank 1, in front of the catalyst) - signal stuck to lean

Error rate: 1
Logistics counter: 40

Mileage 142,500 km
ADC value lambda probe voltage according to Kat (uushk_w) 0.86 V
ADC value lambda probe voltage in front of cat (uulsuv_w) 2.62 V
I-part of the continuous LRHK (dlahi_w) 0.12 -
Fast mean value of the lambda control factor (frm_w) 1.25 -

Fixed on lean
Test conditions met
Error currently present and already saved
Failure would cause a warning lamp to light up
Diagnosis active
-
Cycle flag set
-
Mil a
-

Error code: 2A C3 E8 15 21 95 01 28 37 AA 2C 86 FD A0 37 3A
AF FF 00 A1 37 3F AF FF 00 A2

 

Clear them, and see if they come back.

 

I have already done that at least 4 times and drove a good amount of km, they came back very soon

 

Why did you change the O2 sensors? Did you get them installed in the proper locations? Why did you change the catalytic converter?

 

Long story short, the O2 sensor before the cat faultet over and over again, reasons were a stretched timing chain, the valve stem seals and because the car was driven to long with these issues the cat was kind of melted, black and probably created the 02 sensors fail the sensors react to the gases post and pre cat if cat blocked will over heat upstream and will also cause low reading from down stream, it will also have effect on upstream sensor reaching 600c ie the switching point to closed loop running

 

I'm almost tempted to believe you got a bad cat? Was it a used part, or a new one?

 

It was a new one, but not a factory one (but a one with good reviews) but how do the other error codes relate to a bad cat?