MIL and codes codes codes

[EDankievitch]

I knew things were going too smoothly for way too long. Sometime around 900 miles from home on my almost bi-annual trip to the Fla Keys in the middle of No where I95 south I got that dreaded chime and MIL check engine lamp. With out my scan tool an no dealer in sight and nothing showing out of the normal, except for lower than normal MPG"s we kept on going. Get to the Keys the lamp goes out. After a week an a half and one crushed cab corner:{, Trees do not like this truck as one fell on the hood last summer and this one in Key West jumped into the path of my cab. But that's another story. The body shop will be preforming surgery on the roof late next week.....

On the trip home around the same middle of No where I95 I get the same chime and MIL lamp.
Get home and see Mr. dealer and the following codes show up;
P1475 intake air diverter valve out of calibretion/ missing calibretion, P249E Closed loop reductant injection controll flow too high, B22A900 ECU internal performance issue.
First thing the dealer starts sayin is what DEF fluid are you using? Every time there is an emissions issue the blame always starts with the DEF. If the ECU is not getting the right reading from the intake diverter wouldn't that cause everything else to go out of spec? My question is how does one re set the Intake diverter?
The shop is booked until Monday so I can't get an answer from them until then#@$%!...... Any thoughts on here?

 

[TRAMPLINEMAN]

Yup, two easy outs for the dealer are "bad fuel" and "bad def". Already been thru that.

 

[Bob4x4]

For the 1475 it's either a blockage in the valve(part of the air box) the air box or pcm.The Powertrain Control Module (PCM) controls the operation of the Intake Air Diverter (IAD) Valve. The IAD Valve also has a built in position sensor. The IAD Valve is located in the Airbox. The PCM monitors the IAD Valve Signal circuit to determine if the IAD Valve is moving to the proper position commanded by the PCM. The PCM will illuminate the EVIC message: ‘Active Airbox Service Required-See Dealer’. The PCM will turn off the EVIC message when the condition is corrected.

 

[Bob4x4]

p249e The Powertrain Control Module (PCM) uses the NOx Sensor 1/1 feedback along with engine operating and environmental conditions to calculate the diesel exhaust fluid dosing rate. Fault sets if the DEF Dosing Control Unit detects that the NOx Sensor levels are higher than expected. The DEF DEF SYSTEM LEAKS
POOR QUALITY DEF FLUID
CRYSTALLIZATION IN THE DECOMPOSITION TUBE
SCR CATALYST ERROR
AMMONIA SENSOR
DEF INJECTORDosing Control Unit will turn on the MIL Lamp via the PCM immediately after the monitor runs and fails. The DEF Dosing Control Unit will turn off the MIL Lamp via the PCM immediately after the monitor runs and passes.

possible causes
The new scr cats eliminate the amonia sensor and the problems associated with it

 

[EDankievitch]

The SCR cat was replaced two years ago when I was getting code P2oEE as per TSB 18-088-15. Last winter when we had that really cold snap I was having issues with the DEF freezing the dealer found the sensor would tell the PMC to turn on the heater then turn it off before the DEF would thaw and the doser pump would then blow the fuse. Ram said to replace the Ammonia sensor. By the time sensor was replaced we were out of the deep cold snap so I never was able to find out if it got fixed right. This time I'm not geting the P20EE code.
The DEF usage seemed to be around what I expected 1 gal per 500 miles. The dealer had also changed the NOx sensor wiring as per a rapid recall that said the sensors were not hooked up right but that was well over two years ago. The last few tanks (about 4500 miles) the MPG's have been much lower than normal it's running good just the MPG's are running around 2 to 3 MPG lower than this time last year. And it seems to be going into the re-gen cycle more often. After a long drag of 3800 miles towing at highway speeds the DPF should be nice and clean.
When I was with the service writer yesterday he pulled up the codes then found a "STAR CASE" dealing with the same codes. That tells me there is an issue with something in the system and I'm not the only one with the problem. It just burns me that every time I take this truck on a long trip (longer than 1000 miles) I have it spitting codes. The 2012 that I owned before this one kept filling the crank case with fuel. I hate to say it but after these two trucks I'm starting to loose my faith in Ram/ Cummins.

 

[EDankievitch]

p249e The Powertrain Control Module (PCM) uses the NOx Sensor 1/1 feedback along with engine operating and environmental conditions to calculate the diesel exhaust fluid dosing rate. Fault sets if the DEF Dosing Control Unit detects that the NOx Sensor levels are higher than expected. The DEF DEF SYSTEM LEAKS
POOR QUALITY DEF FLUID
CRYSTALLIZATION IN THE DECOMPOSITION TUBE
SCR CATALYST ERROR
AMMONIA SENSOR
DEF INJECTORDosing Control Unit will turn on the MIL Lamp via the PCM immediately after the monitor runs and fails. The DEF Dosing Control Unit will turn off the MIL Lamp via the PCM immediately after the monitor runs and passes.

possible causes
The new scr cats eliminate the amonia sensor and the problems associated with it

You say the new Scr cats eliminate the amonia sensor all together?

 

[Bob4x4]

You say the new Scr cats eliminate the amonia sensor all together?

That is correct.

 

[Newsa]

That is correct.

That means they remove the ammonia sensor from the VIN. And reprogram the BCM/ECM

 

[EDankievitch]

I wonder if when they replaced my SCR they replaced it with the older design unit. Guess I'll find out in the morning.

 

[EDankievitch]

Back from the shop. DEF fluid is good No issues. They found another TSB and a new software flash. The software went from # 32370031AW to 323700315AU. Seems the new software deals with false readings from the ammonia sensor and a few others. There was a list of codes that would or could be set thatthe new software would solve. The list was almost a page long. Also said something about shifting improvements. I guess time will tell..... I couldn't get the TSB number

 

[sag2]

18-057-15 REV A.
Updated November 2015
This is the Readers Digest version!


SYMPTOM/CONDITION:
Several software improvements are available for the following conditions.
The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault:
• U1A24 - Lost Communication With Ammonia Sensor.
Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect is
Present For The Following Diagnostic Trouble Codes (DTCs). These Faults Have
Been Changed From A One Trip Fault To A Two Trip Fault:
• P0201 - P0206 - Fuel Injector X Circuit/Open.
• P049D - EGR Control Position Exceeding Learning Limit.
• P0711 - Transmission Temperature Sensor Performance.
• P0712 - Transmission Temperature Sensor Low.
• P0713 - Transmission Temperature Sensor High.
• P0714 - Transmission Temperature Sensor Intermittent.
• P0740 - TCC Out Of Range.
• P0869 - Line Pressure High.
• P0933 - Hydraulic Pressure Sensor Range/Performance.
• P0934 - Line Pressure Sensor Circuit Low.
• P0935 - Line Pressure Sensor Circuit High.
• P1775 - Solenoid Switch Valve Latched In TCC Position.
• P1776 - Solenoid Switch Valve Latched In LR Position.
• U0100 - Lost Communication With ECM/PCM.
• U0002 - CAN C Bus Off performance - Bus Off.
Improvements To Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination
When No Defect Is Present For:
• **P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit
Intermittent (setting when the block heater is plugged in).**
• U110E - Lost Ambient Temperature Message.
• P20E8 - (Diesel Exhaust Fluid) Reductant Pressure Too Low.
• P2281 Air Leak Between MAF And Throttle Body.
• U3017 - Control Module Timer/Clock Performance.
• P1477 - Dual Snorkle Calibration Change to Voltage Limit.
• P20EE - SCR NOX Catalyst Efficiency Below Threshold - Bank 1.
• P20E8 - (Diesel Exhaust Fluid) Reductant Pressure Too Low.
• U3017 - Control Module Timer/Clock Performance.
• P026B - Injection Timing Performance.
• P0128 - Thermostat Rationality. In cold ambient temperatures.
• P0087 - Fuel Rail Pressure Too Low.
• U1421 - Implausible Ignition Key Off Time Received.
• P026A - Charge Air Cooler Efficiency Below Threshold.
• P04DB - Crankcase Ventilation System Disconnected.
• P0544 - Exhaust Gas Temperature Sensor Circuit - Bank 1 Sensor 1.
• P0562 - Battery Voltage Low.
• P0604 - Internal Control Module RAM Error.
• P1451 - Diesel Particulate Filter System Performance.
• P20EE - SCR NOX Catalyst Efficiency Below Threshold - Bank 1.
• P202E - Diesel Exhaust Fluid (DEF) Reductant Injector Performance.
• P2201 - Aftertreatment NOX Sensor Circuit Performance - Bank 1 Sensor 1.
• P2281 - Air Leak Between MAF and Throttle Body.
• P24A5 - EGR Cooler Bypass Bank 1 Control Stuck.
18-057-15 REV. A -2-
• P2459 - Diesel Particulate Filter Regeneration Too Frequent.
• P249E - Closed Loop SCR Reductant Injection Control At Limit - Flow Too High.
Other Updates Also Included:
• **SCR Efficiency scan tool test improvement.**
• Transmission Updates.
• Alternator Dropout Threshold Set to 500 RPM.
• Warm Up Combustion Stability Improvement.
• Urea Dosing During Stationary Regen.
• Dual Snorkle Calibrate Mode.
• Various Urea system calibration changes and cold weather system improvements
and dosing heater thaw times.
• Various additional wiTECH data and system test additions or improvements.
• 68RFE Transmission shift quality improvements.
• Cruise control system improvements.
• System enhancements to starter lockout feature.
• Erroneous “Service Exhaust System - see dealer” message setting with the ignition
in the “Run” position, engine not running.
• I/M OBD II readiness - DTC P2002 improvements help Particulate Matter (PM) Filter
monitor group to be set to ready more often.
• Add engine run time to fuel filter minder.
• Remove MIL for DTC; P1C70 - SCR Error Detected - Engine Disabled.
• Frozen CAC Diagnostic Improvement.
• WiTECH - Reset fix (PTO request on Pickup).
• WiTECH - Road governor speed upper limit adjustment.
• SCR Performance test fix.
• DEF Refill detection calibration change.
• Grid heater inhibit correction.
• P0544 - Exhaust Gas Temperature Sensor Circuit - Bank 1 Sensor 1 - Does not
clear correctly.
• Fuel filter minder distance trigger correction.
• Fuel system test improvements.
• Exhaust brake switch improvement.
• Cold idle stability improvement.
• Add ability to reset soot load after DPF replacement.
• Correct condition - Cruise control does not cancel at key off.

 

[EDankievitch]

Yup that's the TSB that I couldn't get the number for. I hope it works...... The new flash that is.

 

[Wayne M.]

That's a HUGE TSB! ED, don't loose faith. It's still better than brand F! IMHO it's paramount to find/ keep a dealer or tech(s) that is capable of "doing the right thing" and follow it through.

 

[SnoKing]

p249e The Powertrain Control Module (PCM) uses the NOx Sensor 1/1 feedback along with engine operating and environmental conditions to calculate the diesel exhaust fluid dosing rate. Fault sets if the DEF Dosing Control Unit detects that the NOx Sensor levels are higher than expected. The DEF DEF SYSTEM LEAKS
POOR QUALITY DEF FLUID
CRYSTALLIZATION IN THE DECOMPOSITION TUBE
SCR CATALYST ERROR
AMMONIA SENSOR
DEF INJECTORDosing Control Unit will turn on the MIL Lamp via the PCM immediately after the monitor runs and fails. The DEF Dosing Control Unit will turn off the MIL Lamp via the PCM immediately after the monitor runs and passes.

possible causes
The new scr cats eliminate the amonia sensor and the problems associated with it

Bob, I got this mil and code P249E cruising along on fairly level road at 6600 ft altitude in the Middle of nowhere 10-15 miles South of Wells, Nv. Try to talk to Assist with confused results, call the dealer in Twin Falls, Id 114 miles North. Decided to push on after talking to dealer. They found the same single code that I did, and said they could not work on it for a week. They agreed to clear the code and turn off mil and we drove 84 miles to our next scheduled stop at Mountain Home. We are still 600+ miles from Summer RV resort and having time to wait for dealer schedules and service. Your thoughts. Thanks Snoking