Tsb 18/12/12

[jackel1959]

I live in Washington state, have a 2011 3500 H/O 6.7L Diesel, Auto, 4:10 gears and tow a 12.5 K 5th wheel. In December 2013 I had a Check Engine Light (CEL)and took the truck to the dealer in the town I live in. They said the connectors for the o2 sensors needed to be rebuilt which they did. 2 days and approx. 400 miles later on a trip to Arizona the CEL came on again. I stopped in Medford, Oregon to have the code read and they said it was okay to drive (o2 sensors again). Got to AZ and then took the truck to a dealer in Blythe, CA where I was told the connectors were rebuilt incorrectly when done before I left home.

The dealer in Blythe re-did the work, but then I discovered I had a lack of power when solo on acceleration and a lack of power when towing especially going up-hill.

When I got back home to Washington, I took the truck to the dealer I purchased from and explained my issue. I even had the 5th wheel hooked up so they could drive it and experience what I was talking about. They looked at the rebuilt connectors and said they looked not so good, but of course no CEL so no problem, but I knew there was. They also stated if there were anymore CELs they would replace the entire harness.

Fast forward to June when I was on another trip and having to tow over the Siskiyou's through Ashland, OR.....it was painful, I actually had semis passing me and it was all I could do to make 42-43 mph up that grade where I could easily tow at 60-62 previously. I called Lithia Dodge in Medford and they agreed to look at the truck. They had it for a day and drove and drove it, but again could not find anything wrong, but when I was on the phone with the service advisor the tech came in and said the entire wiring harness needed to be replaced because it had been so boogered up and they didn't want to try and rebuild the connectors again for fear of creating an even worse problem. The work order read "REPLACED TRANS WIRING HARNESS THEN REINSTALLED SOFTWARE PER TSB 18/12/12". After dealing with a lack of power while towing for nearly 7 months, the truck ran as it did before and I was a happy camper.

Earlier this month I was on a trip to CA and towing when I had another CEL. Took it to a local dealer and they said I had another o2 code (P2196), but before they could go any further they were required to rebuild the o2 connectors on the new harness. Being very reluctant because of my past experience, I contacted my dealer at home and they and the dealer in CA both agreed it would be okay to drive until I returned home and have the work done at my dealer in WA.

When I left CA on my first day of towing the truck ran fine and strong (with the exception of the CEL). On the second day of towing I experienced the same loss of power as before. I can only assume that because of towing the heavy load with the CEL on it caused the engine or transmission to detune even though there has never been any codes indicating this.

Because of my experience with the dealer in Oregon who re-installed the transmission software, I have to believe this is the fix. I have searched and searched, but cannot find TSB 18/12/12. Can anyone shed any light on what the TSB entails?

 

[sag2]

This is what it fixes.

SYMPTOM/CONDITION:
Pickup trucks equipped with a 6.7L Cummins diesel have software
improvements/enhancements available for the following DTC's:
· P049D - EGR CONTROL POSITION EXCEEDED LEARNING LIMIT
· **P0101 - MASS AIR FLOW SENSOR "A" CIRCUIT PERFORMANCE **
· **P0191 - FUEL RAIL PRESSURE SENSOR CIRCUIT PERFORMANCE **
· **P0471 - EXHAUST PRESSURE SENSOR 1 PERFORMANCE (for cold climate /
icing concerns) **
· **P1451 - DIESEL PARTICULATE FILTER SYSTEM PERFORMANCE **
· **P2000 - NOx ABSORBER EFFICIENCY BELOW THRESHOLD **
· P2002 - DIESEL PARTICULATE FILTER EFFICIENCY BELOW THRESHOLD (for
high altitude failures)
· P2195 - O2 SENSOR 1/1 OUT OF RANGE HIGH
· P2196 - O2 SENSOR 1/1 OUT OF RANGE LOW
· P2262 - TURBOCHARGER BOOST PRESSURE NOT DETECTED - MECHANICAL
· P2270 - O2 SENSOR 1/2 OUT OF RANGE HIGH
· P2271 - O2 SENSOR 1/2 OUT OF RANGE LOW
· P241A - O2 SENSOR 1/1 AND 1/2 OXYGEN CONCENTRATION MISMATCH
· P245B - EGR COOLER BYPASS STATUS LINE INTERMITTENT
· **P2453 - DIESEL PARTICULATE FILTER PRESSURE SENSOR A CIRCUIT
PERFORMANCE **
· P2457 - EXHAUST GAS RECIRCULATION COOLING SYSTEM PERFORMANCE
· P2609 - INTAKE AIR HEATER SYSTEM PERFORMANCE
NOTE: Vehicles flashed to address the above codes should be driven and repair
validated. If code(s) return, follow diagnostic procedures available in
DealerCONNECT/TechCONNECT.
Improvements other than DTC robustness or enhancements:
· ** Add EMP sensor value on WiTech **
· ** Improve cruise control functionality **
· ** Display correct EGR position on WiTech **
· ** Display correct Crankcase Pressure on WiTech **
· ** Display Correct alternator voltage in WiTech **
· ** Corrected CAC Outlet temperature voltage reading **
· ** Correct for OBD II Readiness for frequent regeneration monitor **
· ** Improve EVIC message regarding idle shut down (Informs driver of automatic
shutdown due to excessive idle time) **
· WiTech turbo hysterisis test revision.
· ScanTool may report a code as stored, even though the fault has been cleared by
completing a significant number of drive cycles without a repeat occurrence.
· Active codes not always displayed correctly.
· Engine derate with IOD removed. This will help prevent turbo damage due to oil
thickening in cold climate start up on new vehicles in transit.
· Enhancement to reduce shift clunk at stop.
· Other driveability enhancements.
18-012-12 REV. A -2-
**68RFE Transmission Enhancements (vehicles W/O 800 LB. FT. Torque - sales code
XCK ):
1. Power-on 4-3 downshift enhancement
2. Power-on 3-2 downshift enhancement
3. Coast down 4-3 downshift enhancement
4. Coast down 3-2 downshift enhancement
5. Wide Open Throttle 5-6 upshift control enhancement **

 

[jackel1959]

Thank you sag2 for the reply and explanation.

r,
Jack

 

[jackel1959]

***UPDATE***
I took the truck to the dealer I purchased from here in Washington. This is how the repair order read " 49887 C/S CEL on. Found active codes P2196 02 sensor 1/1 stuck rich and P2BAC - NOx exceedence - Deactivation of EGR. PCM up-to-date. Needs SB 25-002-14. Removed and inspected 02 sensors, pretty clean, not sooty at all. Cleaned and swapped position. Performed SB 25-002-14, installed 02 sensors overlay harness, 08-90-24-94, 1.0hrs. During verification road test, got CEL and P2271 - 02 sensor 1/2 stuck rich. This indicates bad 02 sensor since the code followed the sensor. Replaced faulty 02 sensor. Performed Diesel validation drive. No codes returned. Performed Diesel diagnostic worksheet. Repair complete."

When I got the truck back and drove it, it still did not have the power that it had before being told it was okay to tow with the check engine light on. I took it back to the dealer and asked them to re-install the software per TSB 08/12/12. They were reluctant to do so because they could see that software was already installed and there were no indications (read computer codes) that anything was wrong, but at my insistence they did re-install it. After they did that the truck is now running like it should. They are left scratching their heads as am I because there was no indication that anything was wrong, but this reload fixed the problem twice now when I suffered a loss of power after being told it was okay to tow with the CEL. Just thought I would post this information in case anyone else runs into the same issue.

Jack