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Garage can’t fix this, any idead

Ian Cotts
in BMW 1 Series Forum

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I have a 1 series 2016 118d M Sport with fault codes 28EC00 ,2AB600 and 24CF00 . I’ve changed the MAF sensor with a genuine BMW part but still get these faults. My daily commute to work is 35 miles at 70mph so I think the DPF would get burnt up every day. Local specialist isn’t filling me confidence as just keep changing parts. So far swirl flaps been deleted and mapped out, EGR replaced under recall, DPF temp sensor replaced as has the MAF. They now want to blank and remap the EGR but I’m not convinced. Anyone got any experience of these faults and what to look into please.TIA

Regards Ian

  • Quote

    Morning Ian

    Welcome to the Forum

    Bit early but I will get my thinking hat on ( I am a retired Engineer born with a need to know how and why things work) , sadly it seems you have a Tech working on your car not a Mechanic. The difference is a Tech will believe the Codes shown and change parts as indicated, a good Mechanic will see codes as a symptom and look for the cause. Code 24CF00 is related to the MAF the question is what triggered it ? Was it an air leak have all the Air and Vac lines been checked ? You say the swirl flaps have been removed? when the Inlet manifold was replaced were the gaskets renewed?

    You also say the EGR was replaced under Recall was it the EGR or the EGR Cooler ?

    The next 2 Codes are related to exhaust pressure 28EC00 is the pressure sensor upstream of the Turbo 2AB600 is exhaust back pressure. Both sensors can be tested if they are OK then I would look for a blockage in the exhaust/EGR recirculation system (EGR hoses can get clogged with soot)

    Just because your running at motorway speed doesn't mean a Regen cycle has been triggered. The exhaust has to reach certain temperatures for a regen cycle to occur it can be triggered by software. If you have a Regen cycle the re will be a noticeable amount of smoke and you will notice the fan running more

    Sorry if this raises more questions than answers, but from your description the Garage you are using seem to be plugging in Diagnostics and changing parts not testing and checking for the cause. This is why I DIY my own repairs unless it's something that needs heavy Garage equipment

    Dave

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