W213 220d EML light

[Liam94]

2018 E220d W213, throwing a random EML & won’t do over 30 MPH, very jerky into gear too. This has happened twice now in the past two weeks. Switch off & on again, all is normal and drives as normal. EML remains for a couple of starts but then disappears. It happened again this morning. When the EML comes on, the engine cooling fan runs at full speed until the car is switched off. Since the codes were cleared initially it’s done around 250/300 miles without issue.

Had fault codes:

P061B00 - The torque calculation of the control unit has a malfunction

P0607E3 - The control unit has a malfunction

P062B00 - There is an internal control unit fault in the monitoring for the fuel injectors.

The car does feel sluggish under 1,500 RPM and is always keen to kick down and then it goes. When the turbo evidently kicks in it feels plenty powerful enough. Can’t remember if my previous W213 felt like this. Upon a delve under the engine bay to see if anything obvious was apparent, there seems to be a fair bit of oil which has covered the foam over the injectors, and one injector looks to have been replaced. No one I talk to discuss this with can seem to pinpoint anything. Does anyone have any ideas?

 

[supernoodle]

They look like the faults you get when you have a dodgy remap. Have you?

 

[Liam94]

They look like the faults you get when you have a dodgy remap. Have you?

I’ve not long had the car, and haven’t had it mapped, but I thought exactly the same. It doesn’t feel quick enough to have had a map, but then again if it’s a bad map I doubt it would.

Also wondered if it’s had a replacement injector and not been coded.

 

[Liam94]

Another point to note on this; on both occasions it’s been below freezing. This morning was slightly above freezing and no issue.

 

[supernoodle]

Those faults all suggest a level 2 torque monitoring fault.
This monitoring is a safety back up system that effectively does a reverse calculation of the driver demanded torque request based on the injector opening times. It uses completely separate maps to those used in the normal level 1 calculations. If the level 1 and level 2 calculations don't agree it assumes something has seriously wrong and flags errors.

In reality those mappers only fiddle with the level 1, so if they poke around too much this is what can happen. Oh, it doesn't have to be a performance map, it could be EGR, SCR, DPF delete, ie any fiddling.

Temperatures will of course be an input to those torque calcs, so it's possible it's ok when warm and only not ok when cold.

If you bought trade, take it back. If not, take it to an independent that can check the software installed.

 

[dry run]

Maybe a good start would be to book it in to an independent for the latest software update. This would over-ride any dodgy map and shouldn't cost too much. If that doesn't work, you haven't lost much time or money. Just a thought.

 

[Liam94]

Would an Indi Merc specialist be able to tell which software is installed?

 

[Liam94]

Update on this, had the injectors all recoded, one had been replaced and I've done 1,000 miles since and had no EML. Unsure if that was the cause or not, but we'll see how it goes.