padster1
New Member
Greetings all.
Hope this finds you all in the best of health and enjoying yourselves, unlike me!
As you've probably guessed my beloved ML is a bit poorly. It's a 2000 model with 150,000 miles on it and has been a reliable workhorse for the past year or so, up until last week. On my way home from work the thing wouldn't rev past 2000 before changing up a gear and was seriously down on power, did manage to get to motorway speeds eventually though, no CEL and my little bluetooth obd dongle and the torque app couldn't pick up any faults either. I had a little look on the forums and the conclusion seemed to be that the MAF needed replacing. Done that and nothing changed! :-(
Next, I borrowed a mates expensive handheld unit and plugged it in, 2 faults caught my eye.
P1470-16 Charge pressure control, Charge pressure is too low.
P1403-32 EGR rate too low.
And I also noticed that when I hit 2000 RPM the MAF readings drop to -2.4 g/s. (not sure how accurate that reading would be as again its through my cheap dongle through my phone.)
Now looking into the codes separately would suggest the EGR valve is on its way out and so is the turbo, Can't seem to find anyone who has had both codes at the same time though, so not too sure on how to proceed. Hopefully, UK November weather permitting, I'll get a chance to have a good look around it at the weekend and see if there are any perished or cracked hoses but other than that I haven't got the faintest idea of where to start without ripping it all apart! Any advice would be much appreciated.
Hope this finds you all in the best of health and enjoying yourselves, unlike me!
As you've probably guessed my beloved ML is a bit poorly. It's a 2000 model with 150,000 miles on it and has been a reliable workhorse for the past year or so, up until last week. On my way home from work the thing wouldn't rev past 2000 before changing up a gear and was seriously down on power, did manage to get to motorway speeds eventually though, no CEL and my little bluetooth obd dongle and the torque app couldn't pick up any faults either. I had a little look on the forums and the conclusion seemed to be that the MAF needed replacing. Done that and nothing changed! :-(
Next, I borrowed a mates expensive handheld unit and plugged it in, 2 faults caught my eye.
P1470-16 Charge pressure control, Charge pressure is too low.
P1403-32 EGR rate too low.
And I also noticed that when I hit 2000 RPM the MAF readings drop to -2.4 g/s. (not sure how accurate that reading would be as again its through my cheap dongle through my phone.)
Now looking into the codes separately would suggest the EGR valve is on its way out and so is the turbo, Can't seem to find anyone who has had both codes at the same time though, so not too sure on how to proceed. Hopefully, UK November weather permitting, I'll get a chance to have a good look around it at the weekend and see if there are any perished or cracked hoses but other than that I haven't got the faintest idea of where to start without ripping it all apart! Any advice would be much appreciated.
