As the temperatures have fallen closer to +5C, the engine on colds starts revs erratically a great deal. Warm-up times are slow and I have experienced a stall once with a check-engine light present. I haven't driven other N53's so its hard for me to say with 100% accuracy, but I do feel in traffic, that the car is very sluggish off the line and I have to give it a lot of gas to get moving in the first gear. I pulled the codes and this is what I got:
Code:
3072 21 - DME: Cylinder equalization via irregular running, cylinder 3
2A2C 82 - DME: Mixture control 2
307E 21 - DME: Cylinder equalization via lambda, cylinder 3
30DA 21 - DME: Nitrogen-oxide sensor, signal
2CAB 81 - DME: Oxygen sensor 2 before catalytic converter: Temperature
2CA7 81 - DME: Oxygen sensor heater 2 before catalytic converter: Function
2C3E 81 - DME: Oxygen sensor 2 before catalytic converter: Line fault
Judging by this, it looks like the pre-cat o2 sensor is dirty or on its way out. Would this be a correct assumption? What other tests can I do that would help diagnose the root of these issues?
Best regards
N53B30A Low torque & rev float
