In a 2006 w164 Ml320 CDI (nearly 290,000km ) got a heap of codes and intermittent CEL, car in slightly better than Limp mode but will do 100kph but slow acceleration - doesnt seem to kick down (have had limp when can't get to 60kph)

codes (Autel scanner)
2095-1 - and 2094-1 B2/5b1 above limit also 3052-4 and 3053-4 B2/5b1 signal fault - where is the intake air temp sender? I have a motor I could swap it out from
2514-1 R39/1 vent line heater short to ground - this comes and goes
2601-1 and 2600-1 L and R MAF value too small also 2627-4 MAF faulty and 2603-4 short/open circuit - have changed both MAF sensors (had them) and codes still there
2526-2 Y77/1 charge pressure positioner - short to ground - is this the boost actuator? I did have to change it 4 months back
2530-2 M55 inlet port motor short to ground
2527-2 Left EGR short to ground

There is a fair bit of oil around the turbo (from the PCV) but I have 3 of these cars and that seems constant - although this car is the worst

I am thinking if I have a wiring harness failure or will a heap of oil in the connectors under the intake / turbo cause these codes?

 

Here are the locations of most of components.For the B2/5bi they do not show the location.

 

thanks for that - just had the thought (it is 3am here so woke up with it) that could I have lost power to these components - It dawned on me I had a similar fault in a BMW E39 (5 years ago - multiple codes) and there turned out to be a blown fuse that didnt appear on any diagram (located beside the ECU) that was blown.

Would a lack of power to some of the components give a short to ground code? i assume it would give "faulty

Where could I find a Pinout and test procedure for some of these components - MAF might be easiest, and perhaps the other components that are easily accessible

Am I looking for 12v or 5v

is there a fuse that could be blown?

 

 

many thanks - just about to get to car and will check engine fuses - start at 101,103,105,118,120

that fuse assignment is brilliant - never seen anything so specific

I will post what I find - and if it blows again

Have been looking everywhere for pinout of MAF etc - can't seem to find it on the net

 

turned out to be fuse 104 (15 amp)

it looks like it has been replace before me (we have had car from 175000km to 295000 km so a long time ago) as it was not quite the same fuse top

put in new fuse and it blew straight up

Took a gamble and disconnected swirl flap motor plug and stopped blowing fuse (thanks again Maj Dundee for its location)

inlet port motor control now only error code (and have CEL)

I have just done the "delete" on the swirl flap motor and put the resistor between the two middle pins at present. I do have a spare complete engine but it looks like a lot of work. And would prefer to leave the spare motor complete (it only has 45000km on it)

Have taken it for a drive and it seems to drive normally - have done an erase code which has cleared all codes - only stored codes were there after the "delete" so will see how it goes

Has anyone done the inlet port motor (swirl flap) delete, any feedback? am I right in saying the valves are held in open with a spring (it certainly drives ok with top end power)

Also has anyone done a catch can setup from the PCV - which I imagine was my problem in the first place??

 

Try swapping relay KD with similar color relay.

 

At present all good - no codes etc, the swirl motor delete seems ok..

will do the relay swap , seems like a good idea - same circuit as fuse 104 - (have a spare fusebox from wreck)

Is there a voltage/resistance check for the swirl flap (inlet port shutoff) motor?

 

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Is there a voltage/resistance check for the swirl flap (inlet port shutoff) motor?

That I do not know.

https://www.youtube.com/results?sear...shutoff)+motor