Frequent Regen Diagnostic Tip

cbriggs · December 9, 2009

I beleive it de-rates engine 25 hp, so yes it will affect performance.

robp823 · December 10, 2009

So why does web based tell you it doesnt affect performance....I think they need to update that or if someone has the TSB number for characteristics of regen..

Aaron · December 10, 2009

"Regeneration Functional Characteristics"?

Probly been superseded.

I think I have it somewhere.

But it you punch in P1335 as a DTC in OASIS with a VIN -- the update comes with a regen sheet and it says the powertrain output is "modestly limited".

robp823 · December 10, 2009

thanks aaron Has anyone had problems with the pressure sensor??

Aaron · December 10, 2009

I've had one melted.

Hose melted, sensor melted.

Have the occasional VREF problem, too, but there's usually a big ass pile of codes

cbriggs · December 12, 2009

Quote:

Quote:
2904 - 2008-2010 F-SUPER DUTY - P2463 AND P246C CODES WILL NOT CLEAR
SOME 2008-2010 F-SUPER-DUTY MAY EXHIBIT DIAGNOSTIC TROUBLE CODES P2463(DPF RESTRICTION-SOOT ACCUMULATION) AND/OR P246C(DPF RESTRICTION- FORCED LIMITED POWER) THAT WILL NOT CLEAR USING IDS OR MAY RETURN WITHIN LESS THAN 100 MILES FOLLOWING REPLACEMENT OF THE DIESEL PARTICULATE FILTER(DPF). THIS CONCERN MAY BE DUE TO MAF SENSOR CONTAMINATION. VISUALLY INSPECT MAF SENSOR FOR DEBRIS (DIRT/OIL) AND FOREIGN OBJECTS. PERFORM MAF SENSOR PCED PIN POINT TEST J TO CONFIRM SENSOR FUNCTIONALITY. PERFORM PIN POINT TEST RB TO VALIDATE DPF FUNCTIONALITY. CONFIRM AIR FILTER, FILTER LID, PCV PORT AND ALL ATTACHING HARDWARE ARE CORRECTLY INSTALLED AND LATCHED. ENGINEERING INVESTIGATION IN PROGRESS. MONITOR OASIS FOR FUTURE UPDATES.

I have one of these in my bay right now. Cannot clear p2463 and p246c. Clear codes, engine runs for about 3 seconds and then cel and wrench light come back on.It is a forced limited power strategy as well, so it renders this loaded f550 useless. DPF staus pid reads clogged. Tried to run manual regen ( which is hard at -20`c i found out, cant keep downsteam egt and frt hot enough to run) but it wont run cuz theres trouble codes. After doing the 300 second dpf assesment, the pid now reads partially loaded, but it still triggers codes immeditely. Pinpoint tests j and rb are inconclusive. This truck had a new dpf 12000km ago for cracked/ black smoking. All pids look ok, dpf pressure is .4 to .5 lbs at idle, around 6 lbs floorboarded. Maf sensor "looks" ok, hard to see the hot wires in these though. Im not convinced a maf is going to solve it, but well see.

Aaron · December 14, 2009

I had one of them do the same thing and I ended up having to change the DPF on it.

Just out of curiosity -- how many miles are on the unit, and how many hours are on it?

cbriggs · December 14, 2009

45000 ish kms on it, 12000 on a replacement dpf, i think it was just shy of 900 hrs. I'll have to check again tommorow. I tried a maf sensor on saturday, but no difference.

Keith Browning · December 16, 2009

I had a long chat with my FSE today - I mentioned this topic and he advised me of a known concern involving connector C110 at the left front shock tower. If you have any type of regen or EGT issue bring up all of the PIDS for DPF and EGT's and perform a wiggle test paying attention to this connector. Disconnect and inspect for loose and pushed out terminal pins causing erratic signals.

Aaron · December 16, 2009

I noticed that while I had that last truck apart, the harness that runs across that entire side of the truck near the shock tower ISN'T FASTENED TO ANYTHING!!

Keith Browning · December 16, 2009

Connector C100 should be attached to a bracket on the left shock tower. Was your truck left in disarray by a another tech?

Aaron · December 16, 2009

The connector was attached, but the harness isn't supported AT ALL, and there's no provision to attach it to anything.

Aaron · December 16, 2009

So I would imagine chafing of that harness could occur pretty easily

cbriggs · December 17, 2009

I had that on a 450, brand new.( 25 kms on odometer) Accelerate hard and cel would come on and it would go into derate. It was a pushed out pin on that connector. I beleive it was an egt probe wire, #1 in exhaust i think. ( it was a while ago)

robp823 · December 23, 2009

I actually had another truck come in for frequent regens and after reading this topic the first thing i did was check the MAF and low and behold it was very dirty.Cleaned with some spray cleaner cleared codes sent it on its way.Customer says its running beautiful now.