could it be the VGT control solenoid?

 

P0234 - Turbocharger Engine Overboost
-Test the charge air cooler for leaks.
-Inspect the turbocharger oil supply tube for restrictions.
-Inspect the turbocharger and turbocharger ducts for debris, sticking vanes, worn impeller and turbine blades or damage.
-If the induction system, charge air cooler system, the turbocharger and the turbocharger oil supply test normal, replace the B74 MAP sensor.

P2263 - Turbocharger Boost System Performance
-Inspect the turbocharger oil supply tube for restrictions.
-Inspect the turbocharger and turbocharger ducts for debris, sticking vanes, worn impeller and turbine blades or damage.
-If the induction system, charge air cooler system, the turbocharger and the turbocharger oil supply test normal, replace the B74 MAP sensor.

P2599 - Turbocharger Boost Control Position Performance - High Position
-Inspect the turbocharger for debris, sticking vanes, or damage.
-Inspect the Q41 turbocharger vane position control solenoid valve and B112 turbocharger Vane Position Sensor for damage or sticking.

 

How about creating a garage with pictures of the FFR Coupe. Would love to see some shots.

 

There are a ton of pics on my website from its first track day outing racing / 2017 VIR March 24-26, 2017 | FFR#48 John George Racing

enjoy

 

Has it been checked for boost leaks?

 

Ill look tonight. I dont remember hearing any leaks.

 

These were the same codes I was getting on my 2011 that Chevy lemoned. Do a search for my screen name or "overboost". I believe the final diagnosis was a bad turbo but they screwed around with it so much not authorizing the correct fix that it went into "lemon" territory. I believe the guide vanes were sticking. But the symptoms were exactly as you describe, uphill while pulling and then passing a big rig.

 

I had the exact same codes on my 2015 last year during the exact same conditions: towing uphill when passing bigrigs. Had it at WOT for probably a minute or two to maintain 65 while towing a 13k brick. I scanned and cleared the codes then took it to dealer. They wouldn't troubleshoot anything unless the codes were actively in the computer. Sigh.

A few months later I noticed my downpipe was leaking pretty bad and doing the whole white smoke during regen so I got that fixed.

Not sure if those are related but issue hasn't come back. At 72k miles now so I'd hate for turbo to completely go out outside of warranty...

 

I am not getting any codes according to the dealer. Just won't pull like it did a month ago. 6 to 7 percent grade, pulled 20K gross with ease, now won't pull over 56 MPH. No explanation from the dealer. They cleaned the MAS sensor, that seems to help the mileage when I'm not pulling but drops off mileage and power when pull, don't know where to take it from here.

 

Take it someplace thats going to do more than clean your MAF sensor. You could of done that. Just because there's no codes there being lazy. I hope they looked at a couple hundred readings that they can do in a short time to see if everything is in spec.

 

Sounds like my problem in fall of 2015. New turbo installed under warranty. No similar problems since. This happened during trip to northwest pulling 15K fifth wheel and finally a dealer in Salt Lake City fixed it.

 

2016 3500HD Crew Cab Dually stock with 24,000miles. I recently got these codes while hauling approx. 10,000lbs on the bumper about 75mph up long hill, reset codes and moved on. Few weeks later I remembered and started doing research. Ended up taking to dealer and their conclusion was that my air filter was pinched and allowing air around the filter seal, they provided air filter and picture as proof, installed new air filter. I've accepted this answer so far until I can duplicate the scenario and see if the codes are thrown again. Diesel mechanic there said anything that allows extra air availability beyond the stock air filter can cause the overboost condition. Does this sound like a legit answer? Thanks.

 

Diesel mechanic there said anything that allows extra air availability beyond the stock air filter can cause the overboost condition. Does this sound like a legit answer? Thanks.

Absolutely NOT TRUE. I purchased my truck used in Houston and drove it home to Topeka, KS, about 735 miles, and a couple of weeks later found that it had NO AIR FILTER AT ALL. Ran fine all that time.

 

I took it to an independent shop that was recommended. They ran all the inactive codes, nothing. No active codes. I don't know what else they checked, did a forced regen, said it took over 40 minutes, thought maybe there was a build up of ash.
I won't have a chance to really load it up and see if it has done any good for a couple of weeks. I'm curious if that is all it was. They suggested changing the fuel filter again as I used a NAPA filter, recommended going back to an AC Delco. That I will do in a few days.
Thanks for the replies.

 

Ron were you pulling a trailer or anything?

 

No, just getting it home. Funny thing about the air cleaner is that after I got it home, I took it to a dealer to have a 50K maintenance check done and they told me everything was A-OK. About a week or so later, I was looking at a post about the gauge on the intake that tells you how restricted your air filter was and when the filter should be changed. Got to thinking about that and wondered how restricted mine was, looked at the gauge and no restriction, so I opened up the cover, and that's when I discovered NO FILTER. No wonder there was no restriction! It was another month or two before I started pulling the trailer and it had a stock filter element in it by then.

 

I see. It'll be a few weeks before I get to load up and try to duplicate the scenario again.

 

I think my truck is fixed now.

At first I replaced the turbo vane position sensor, and that did nothing to the error codes, they still came up. Then I replaced the MAP sensor, I haven't thrown codes yet. Use cruise control and exhaust brake when towning around 70-74mph even up hills I let the truck do its thing.

 

I'm having the exact same problem Johngeorge. Funny too, it appears we have the exact same 5er too. I have a 38' Gearbox Toyhauler tri-axle. Looks very similar to the setup you have on your avatar.

So I just wanted to check in and see if you're still trouble-free after replacing the Turbo Vane Position Sensor and MAP sensor.

Thank you,
Tim

 

Why did you choose the MAP sensor? Great that it seemed to fix your problem, but what let you to that?

 

try to get a hold of a ''tech2 scanner'',run the turbo vanes 0-100,the problem is the vanes arnt going thru the full range of travel

 

I just had this happen again on mine at 91k mi. P0234, P2263, P2599 just like the OP. Pulling 13k at WOT up a hill. Engine power reduced, pulled over, cycled the ignition and engine power back to 100% but CEL illuminated. After a few more ignition cycles the CEL went away on its own.

I just took a peek under the hood and saw the cold pipe clamp where it connects to the turbo. I grabbed a 7/16" wrench and tightened it up... was pretty loose. Got the nut down another 1/8" or so. See pic.

Hopefully that was the problem. I'm taking it to the dealer to check everything over and will report back with results. Fingers crossed that loose clamp was the problem. The clamp looks suspiciously new especially considering how dirty that boot is and I've never touched it...

 

The clamp looks suspiciously new especially considering how dirty that boot is and I've never touched it..

Ya that's not normal, should be dirty.
The other clamp looks loose to. It must be buried. I stick them both up so there easy to tighten up.

 

This came for my 2008 model but outlines how to seal the turbo piping.



Engine - Oil Leaks from Charge Air Cooler/Turbocharger TECHNICAL
Bulletin No.: 09-06-93-001A
Date: February 12, 2010
Subject: Engine Oil Leaks from Charge Air Cooler and Turbocharger Air Inlet Adapter (Replace Clamp and/or Turbo Inlet Duct/Pipe)
Models:
2007-2009 Chevrolet Kodiak
2007-2010 Chevrolet and GMC Light and Medium Duty Trucks Equipped with Diesel Engines
2007-2010 Chevrolet Silverado Equipped with Engine RPO LLY, LBZ or LMM Diesel
2007-2009 GMC TopKick Equipped with Engine RPO LLY, LBZ or LMM Diesel
2007-2010 GMC Sierra
Please Refer to GMVIS Supercede:
This bulletin is being revised to update the model years. Please discard Corporate Bulletin Number 09-06-93-001 (Section 06 - Engine/Propulsion System). Condition
Some customers may comment on an engine oil leak from the rear of the engine near the flywheel housing. Upon further investigation, a technician may find oil in the charge air cooler or turbocharger air inlet adapter.
Cause
Note
Oil found in this system is very rarely an indication of a turbocharger failure. This condition may be caused by a loose clamp at the inlet duct/pipe located on the turbocharger. Oil may carry over from the PCV system and leak out the turbo inlet duct/pipe.
Correction
Note
Do not replace the turbocharger if oil is found in the charge air cooler pipes. Important
When replacing the clamp, tighten the clamp to 5 Nm (41 lb in), then loosen and re-tighten to 5 Nm (41 lb in). OIL LEAK FOUND AT CHARGE AIR COOLER OUTLET (HOT SIDE)
Clean the rubber duct hose with soapy water and allow to dry. Apply a thin bead of high temperature RTV silicone sealant to the turbocharger compressor outlet port and CAC duct connections.
Tighten
Tighten the clamps to 8 Nm (70 lb in). OIL LEAK FOUND (Full-Size Pickup Trucks - Silverado and Sierra)
Replace the turbo inlet duct/pipe and clamp with P/N 98011738.
OIL LEAK FOUND (Vans and Medium Duty Trucks)
Replace the air intake clamp with P/N 97376379. Refer to Air Intake Pipe Replacement in SI.
Parts Information
Note
Do not replace the inlet adapter/duct on vans and medium duty trucks - only replace the clamp.

 

My 3500 has around 130k on it. It is a 2016 cab and chasis. We haul heavy (goose-neck with 8 to 15k loads constantly. We run with the scanner plugged in to clear the code as it comes up before limp mode sets in.

I have spent thousands at the dealer on this problem and the DEF issues ... ugh ... but still have the issues. P2002 is the main code but P2263 is a big problem when pulling up a hill.

I have read this thread and still don't really know where to look. So what causes the LML to throw P2263 T/S Charger Boost Sys Perf code? I suppose a turbo leak test or a leak in the air intake system would be a starting point, but that's just a guess. Any direction that would help get me to a solution would help.

 

My 3500 has around 130k on it. It is a 2016 cab and chasis. We haul heavy (goose-neck with 8 to 15k loads constantly. We run with the scanner plugged in to clear the code as it comes up before limp mode sets in.

I have spent thousands at the dealer on this problem and the DEF issues ... ugh ... but still have the issues. P2002 is the main code but P2263 is a big problem when pulling up a hill.

I have read this thread and still don't really know where to look. So what causes the LML to throw P2263 T/S Charger Boost Sys Perf code? I suppose a turbo leak test or a leak in the air intake system would be a starting point, but that's just a guess. Any direction that would help get me to a solution would help.

Lots of posts about P2263 Did you search???


I don't have any information about P2263 but here is some on P2002. Why not purchase a subscription to ALLDATADIY or other similar sites? Will save you lots of money and trouble.


DTC P2002

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. See: Testing and Inspection\Initial Inspection and Diagnostic Overview
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provide an overview of each diagnostic category.

DTC Descriptor

DTC P2002

• Diesel Particulate Filter Efficiency

Circuit/System Description

The particulates in the exhaust gases are collected by the diesel particulate filter (DPF). When the filter becomes saturated with particulates, they are oxidized by a regeneration process. The regeneration process increases the exhaust gas temperature, heating the diesel oxidation catalyst (DOC), and the DPF. The accumulated particulate matter in the DPF will then be safely converted to harmless gases and the DPF will then be clean and ready to filter additional particulate matter.

The engine control module (ECM) monitors the system with inputs from two exhaust gas temperature (EGT) sensors 1 and 2 and a differential pressure sensor. This diesel particulate filter diagnostic provides a means for monitoring the exhaust particulate filter (EPF) efficiency. The resistive exhaust flow is monitored to determine if a DPF substrate is missing or a defined DPF failure has occurred. The resistive exhaust flow is calculated from mass air flow and DPF differential pressure. This diagnostic will run after a successful regeneration event has completed. This includes a successful service regeneration event.

Conditions for Running the DTC

• DTCs P0101, P0102, P0103, P0545, P0546, P0642, P0643, P0652, P0653, P0698, P0699, P2032, P2033, P2227, P2228, P2453, P2454, and P2455 are not set.
• A regeneration event must be complete.
• The vehicle speed is greater than 40 km/h (25 mph).
• The engine load is greater than 25 percent.
• Engine Run Time Since Last DPF Regeneration is less than 10 minutes.
• Distance Since Last DPF Regeneration is less than 30 km (18.6 mi).
• The Soot Mass is less than 40 grams.
• DTC P2002 runs once when the above conditions are met.

Conditions for Setting the DTC

The ECM detects that the particulate filter has degraded below a calibrated threshold for greater than 30 seconds.

Action Taken When the DTC Sets

DTC P2002 is a Type B DTC.

Conditions for Clearing the DTC

DTC P2002 is a Type B DTC.

Circuit/System Verification

1. Verify that DTCs P003A, P0047, P0048, P0101, P0201-P0208, P0234, P0299, P02A1, P02A5, P02AD, P02B1, P02B5, P02B9, P029D, P0300-P0308, P0401, P0402, P046C, P0545, P0546, P2032, or P2033 are not set.

• • If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle.

1. Verify that leaks do not exist in the exhaust system. Refer to Exhaust Leakage.
2. Engine running at idle, perform the following:

1. Engine coolant temperature greater than 80°C (176°F).
2. Command the EGR solenoid with a scan tool to 25 percent.
3. Perform several accelerator pedal sweeps by rapidly depressing the accelerator pedal to wide open throttle (WOT) and returning the pedal to the at rest position, allowing the engine to return to idle speed for 5 seconds, while observing the exhaust from the tailpipe. There should be very light or no smoke visible from the tailpipe.

• • If a heavy black smoke is observed from the vehicles tailpipe, replace the particulate filter assembly.

Circuit/System Testing

Important: Perform the Repair Verification after completing the Circuit/System Testing.

1. Verify the integrity of the entire exhaust system by visually inspecting for the following conditions:

• • Any damaged components
  • Improper installation. The exhaust differential pressure lines should have a continuous downward gradient, without bends or kinks, from the differential pressure sensor to the particulate filter.
  • Improperly routed exhaust differential pressure sensor lines. The smaller line connects to the front of the exhaust particulate filter and the smaller port of the exhaust pressure sensor.

1. Remove the exhaust differential pressure sensor lines. Visually inspect the lines for restrictions.

• • If a condition is found, replace the exhaust differential pressure lines.

1. Verify the integrity of the entire air induction system by inspecting for the following conditions:

• • Restrictions in the air induction system and the turbocharger system
  • Leaks in the intake air ducts and the turbocharger ducts
  • Cracked or damaged MAF sensor housing
  • Inspect for a dirty air filter element
  • Debris blocking the air sensing filaments of the MAF sensor
  • If a condition is found, repair as necessary.

1. Test the charge air cooler system for leaks. Perform the Full System Air Leak Test in Charge Air Cooler Diagnosis (Full System Air Leak Test) Charge Air Cooler Diagnosis (Induction System Smoke Test) Charge Air Cooler Diagnosis (Charge Air Cooler Air Leak Test).

• • If a charge air cooler leak is found, repair as necessary.

1. Test the engine air induction system for leaks. Perform the Induction System Smoke Test in Charge Air Cooler Diagnosis (Full System Air Leak Test) Charge Air Cooler Diagnosis (Induction System Smoke Test) Charge Air Cooler Diagnosis (Charge Air Cooler Air Leak Test).

• • If an induction air leak is found, repair as necessary.

1. If the air intake system, exhaust system, DPF components, and the charge air cooler test normal, replace the particulate filter.

Repair Instructions

• Exhaust Particulate Filter Replacement (6.6L - Pickup) Exhaust Particulate Filter Replacement (6.6L - Cab/Chassis)
• Exhaust Particulate Filter Cleaning (LMM DPF Regeneration Enable) Exhaust Particulate Filter Cleaning (LMM DPF Service Regeneration) for Regeneration Enable

Repair Verification

Notice: Refer to Diesel Particulate Filter (DPF) Regeneration Enable Notice.

Certain engine control conditions can cause the DPF to overload with soot. It will be necessary to clean the DPF as instructed to remove the excess soot accumulation. To avoid the customer's return to the service department, perform the appropriate Exhaust Particulate Cleaning procedure that is specified in the provided link.

 

Thanks for the info Ron. I have searched and will continue to do so. The ALLDATADIY site looks like a good place to get some direction for sure. Onward

 

Bummer

 

Anyone have any updates on this? I have a 2011 LML deleted. Pulling 10,000lb 5er getting p2263 and p2599 pulling hills.
Thanks for any info

 

I pull a 36' 5th wheel that's a bit shy of 20K lbs and this past spring started getting the P0234 & P2599 code while pulling uphill along with a Reduced Power notification. Took it into Banghart Diesel Racing in Wahoo, NE and they thought it might have been the turbo vane sensor was starting to go. Great folks there and addressed 2 other issues they located. Spent the summer in NE & while not pulling, read many forum articles on the issue and found one that mentioned air leaks and made sure all clamps were snug; cleaned the MAF sensor and looked at the recently changed air filter. Found a 2"+ cut in the perimeter gasket allowing more unaccounted for airflow into the system, producing the over-boost condition. Replaced the filter and have not seen the codes again after pulling 1,400 miles from Omaha to Tucson last month. Hope this helps. :facepalm:

 

This set of codes has been pretty common in the LML when being worked hard. It does not see as though it is making excessive peak boost, just more that required or expected at some point. I've been addressing this through ECM programming.