2014 Mini Countryman Automatic SD

[stevenkeyte]

Hello everyone, I previously discussed limp mode here some time back. A small mechanic inspected the car but was unable to identify any issues and expressed confusion. Instructed me to remove the interior fuse box, as moisture occasionally infiltrates and induces erratic malfunctions. I examined all fuses and relays, stored it in a warm location for a week, and subsequently replaced it. The fault code for glow plug number four was detected, prompting the replacement of all four glow plugs. Currently indicating the activation of glow plugs 1, 2, and 3. I will replace the glow plug harness and the glow plug control module. Any assistance would be greatly appreciated.

[stevenkeyte]

I have replaced the glow plugs twice and performed a DPF cleaning. However, it remains in limp mode.

[Black_raven]

Extremely ambiguous; it is essential to obtain fault codes and any live data to ascertain the underlying issues. Occasionally, a turbo malfunction, DPF complication, or EGR valve failure may mimic limp mode, while the actual problem could be insufficient boost. Furthermore, engines with over 80,000 miles may experience timing chain elongation, leading to a flat performance that resembles limp mode, often without generating fault codes, complicating diagnosis. Gearbox malfunctions may resemble limp mode if it becomes jammed in third gear, as a self-protective measure. This defect can be challenging to diagnose. Glow plugs do not activate limp mode; however, a blocked DPF will trigger it, as regeneration is impossible without functional glow plugs. It is typical for the glow plug controller to fail. BMW component priced at £58

[stevenkeyte]

Upon initially replacing the glow plugs, the code 4952 indicated a smooth working controller for cylinder 4, with 4A44/4A64 activating cylinders 1 and 3. Replaced all four once more, resulting in a 4A64 cylinder. One activation
4A54 cylinder Two activations
Activation of cylinder 3 in 4A44


E373 no message (RLS wiper speed), receiver integrated automatic heating/air conditioning system/IHKS/IHS, Transmission JBE; what should be attempted next? I performed a DPF cleaning despite having a DPF deletion last year.

[Black_raven]

If you encounter difficulties, submit it to me, and I will resolve the issue. It requires a systematic approach, including smoke testing and diagnostics, and having expertise is advantageous.

[stevenkeyte]

I am considering that if I replace the glow plug controller, I should also replace the glow plug loom.

[Black_raven]

In 2014, a transition occurred in the diesel particulate filter (DPF) and catalytic converter (cat) systems. Vehicles manufactured prior to this year were equipped with a catalytic converter preceding the DPF, whereas post-2014 models feature a catalytic converter followed by a DPF, with a passive catalytic converter integrated midway through the exhaust system. In all instances of DPF removal, I have had to eliminate the passive catalytic converter, as the absence of the DPF leads to soot accumulation that obstructs it over time.

[Black_raven]

😶‍🌫️

[stevenkeyte]

Is the passive cat easily removable and cleanable?

[Black_raven]

I utilise a 2-foot long spike to incapacitate them. Regarding cleaning, one may consider pumping a substance into the rear section of the exhaust. If your vehicle is equipped with two oxygen sensors, it will possess a catalytic converter; if it has only one sensor, it will not.