Turbo Replaced, now this problem! DPF?
Thread Starter
Junior Member
Joined: Jan 2019
Posts: 16
Likes: 0
From: Lake Elsinore CA
2003 S430, 2005 Ml350, 2010 R350 Bluetec
Turbo Replaced, now this problem! DPF?
Hey guys, thanks for all your advice on my turbo replacement. I ended up getting a local shop to install my new Mahle turbo on my 2010 R350 Bluetec. I have driven it about 1000 miles in 10 days and all seemed good until last night. I must admit it was challenge getting my smog done this week (part of why I drove so much). Almost 500 miles with no problem and as soon as I went to smog I got CEL. Scanned and it just gave me "DPF Regen frequency not ok" and "fuel sending unit to guage fault which I knew about, guage doesn't work". It ran fine so I reset code and drove to reset monitor. After 150-200 miles went to smog and light came on 1 block from smog shop. Reset and drove another 150-200 miles and got it smogged 
Right after smog, light came on again (always the same code). So last night I filled up and boom, started running like crap. There is also a quiet growl (not high pitched) coming from turbo area at spool down when I listen when stopped. Car feels okay at light acceleration.These are my codes now:
14B000 Relative boost pressure exceeds upper limit value
143B00 CAN signal fuel level from control unit A1 (inst cluster) implausible. (This one is not a new code)
123A00 Negative control deviation during boost pressure control is too high
14A900 Upper limit value of component B60 (exhaust backpressure sensor) has been exceeded.
126800 Component Y77/1 (charge pressure positioner) is faulty.
16e200 Fault code not found in database
Turbo is new, Is this simply a clogged DPF? Any advice or experience is appreciated. I was planning on a delete anyways but I have only had this car for 2 mos and it's only been running for a week!
Right after smog, light came on again (always the same code). So last night I filled up and boom, started running like crap. There is also a quiet growl (not high pitched) coming from turbo area at spool down when I listen when stopped. Car feels okay at light acceleration.These are my codes now:14B000 Relative boost pressure exceeds upper limit value
143B00 CAN signal fuel level from control unit A1 (inst cluster) implausible. (This one is not a new code)
123A00 Negative control deviation during boost pressure control is too high
14A900 Upper limit value of component B60 (exhaust backpressure sensor) has been exceeded.
126800 Component Y77/1 (charge pressure positioner) is faulty.
16e200 Fault code not found in database
Turbo is new, Is this simply a clogged DPF? Any advice or experience is appreciated. I was planning on a delete anyways but I have only had this car for 2 mos and it's only been running for a week!
Thread Starter
Junior Member
Joined: Jan 2019
Posts: 16
Likes: 0
From: Lake Elsinore CA
2003 S430, 2005 Ml350, 2010 R350 Bluetec
Just a "failed to regen" code at the auction. It ran fine when I bought it and all hell broke loose 50 miles later. I spoke to previous owner, after telling me how much she hated the car she said she was the original owner, had 100,000 mile warranty and used it alot. She only took it to the dealer for service and had the DEF level sensors replaced at one point, timing chain tensioner and most recently oil cooler seals at $2000 in November. She said that was her first big bill out of warranty and said she was finished so she traded it in. But she said it was running fine when she traded it in.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
You need to force regeneration and get scanner who can read status and soot %
iCarsoft MBII has regeneration program.
Having ScanGauge for my Ford, I contact them and they made X-gauge for my 250 Bluetec, while they did work on gauges for 3l Bluetec.
ScanGauge will not do regeneration, but for long run you want the gauge to monitor regeneration.
All that assuming that the codes are real faults, when several of them popping at the same time might indicate electrical/electronic problem.
Good luck.
iCarsoft MBII has regeneration program.
Having ScanGauge for my Ford, I contact them and they made X-gauge for my 250 Bluetec, while they did work on gauges for 3l Bluetec.
ScanGauge will not do regeneration, but for long run you want the gauge to monitor regeneration.
All that assuming that the codes are real faults, when several of them popping at the same time might indicate electrical/electronic problem.
Good luck.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
There is still not much wisdom about DPFs, but from what I am getting from experience, DPF in normal conditions regenerate itself just fine and my 2008 (pre DEF) DPF with 190k miles never gave any trouble.
Trouble start with something else. On my 250 Bluetec I had MAF failure, 200 miles later OX sensor failure and the DPF would not regenerate after.
My conclusion is that when something goes out of order, like stopping regeneration on short drives, or avoiding regeneration due faulty sensor, the soot accumulate and than car regeneration is no longer sufficient.
At this point you need to force regeneration with scanner, or send DPF for cleaning.
Coming to your last question - my scanner as condition to start regeneration -asks for at least 1/4 tank of fuel, so yes, I think with your fuel gauge kaput - the computer halted regeneration.
Trouble start with something else. On my 250 Bluetec I had MAF failure, 200 miles later OX sensor failure and the DPF would not regenerate after.
My conclusion is that when something goes out of order, like stopping regeneration on short drives, or avoiding regeneration due faulty sensor, the soot accumulate and than car regeneration is no longer sufficient.
At this point you need to force regeneration with scanner, or send DPF for cleaning.
Coming to your last question - my scanner as condition to start regeneration -asks for at least 1/4 tank of fuel, so yes, I think with your fuel gauge kaput - the computer halted regeneration.
