Unfixable CEL?

[AfterBurner]

Just picked up 2011 sig truck from dealership for the fourth time in 3 mos. Everytime that I pulled codes I got P2201 (NOx sensor) and U059E (?). Two visits ago dealer said they also got P2580 (turbo speed sensor). Dealer has cleaned and replaced NOx & turbo sensors, and this last visit they replaced the whole turbo with a re-man. Dealer says fuel and oil are getting into the exhaust, and thought it might had been through the turbo.

The CEL always comes back on about 20 miles after getting the truck back. So far the truck has spent a month of the last three months sitting at the dealer! I can't afford to not have my truck that much. Wondering what the next step should be. Dealer states they have a case open with chrysler, but this is ridiculous! I'm going to get two weeks worth of hauling done monday and tuesday so I can take it back to the dealer. Dealer won't provide a loaner vehicle...even though I bought it from them.

Currently truck has 44K and is 100% stock.

 

[Newt]

Texas has a "Lemon Law", document everything.

Newt

 

[Joseph Donnelly]

You could also try to get them, or another dealer, to give you a great deal trading it on a leftover 2013. You would get a better truck and get rid of the problem.

 

[AfterBurner]

You could also try to get them, or another dealer, to give you a great deal trading it on a leftover 2013. You would get a better truck and get rid of the problem.

That's what my wife keeps saying! I don't really want to jump into a new one already since I've got this one setup how I like it; but it might be the best way to go.

I'll read up on the Lemon Law and see if it applies.

Thanks for replies!

 

[sag2]

This code should be fairly easy to duplicate by the dealer. It measures NOx on a decel when there should be none in the exhaust stream. You get the sensor up to at least 302 degrees and perform several 10 second decel (70 mph to xx mph in 10 seconds). If the monitor passes no CEL, if there is NOx detected, CEL. The NOx can only be from fuel that is getting past the injectors (dribbling fuel when injector is shut off) or from oil being burned. Have you ever replaced the crankcase filter? I know it's early, but a plugged filter can cause oil to be sucked into the intake. How often do you change the oil? How many fuel filters have been replaced?
The U059E is a code that indicates invalid information was received from the NOx sensor after the monitor ran.

 

[AfterBurner]

This code should be fairly easy to duplicate by the dealer. It measures NOx on a decel when there should be none in the exhaust stream. You get the sensor up to at least 302 degrees and perform several 10 second decel (70 mph to xx mph in 10 seconds). If the monitor passes no CEL, if there is NOx detected, CEL. The NOx can only be from fuel that is getting past the injectors (dribbling fuel when injector is shut off) or from oil being burned. Have you ever replaced the crankcase filter? I know it's early, but a plugged filter can cause oil to be sucked into the intake. How often do you change the oil? How many fuel filters have been replaced?
The U059E is a code that indicates invalid information was received from the NOx sensor after the monitor ran.

Sag, thanks for the info. When the CEL came back yesterday I was decelerating from 60 mph with the exhaust brake engaged. Being a C&C I don't get an oil change light until 7500 mi and that's when I do it; except this last time I was out of the country for a few months so I changed it at the 6 mos mark with only 2500 miles. I've changed the fuel filter twice, with the last one 7k miles ago. I've never changed the crankcase filter.

Does tech authority describe the fix method you stated? If not, how do I tell the dealer to use the method you suggested?

 

[sag2]

It is all spelled out in the diagnostic code procedure. They must have looked at the procedure because they replaced the turbo for possible oil getting through it. If they noticed excessive oil in the intake it may be from a plugged crankcase filter. It obviously wasn't a bad turbo. If you want to invest $15 you might go down to Napa and pick up a bottle of Diesel Fuel Therapy from CRC. It is the same stuff now packaged for Mopar to clean the injectors. You can't do the fuel pressure override to run the rail pressure up like the service info says, but it can't hurt to add it and drive it hard.

 

[AfterBurner]

I'll run some of the Fuel Therapy through, reset the CEL and see how long it takes for the code to come back.
Thanks,

 

[Bill Lins]

If that doesn't do it I'd contact the zone office.

 

[AfterBurner]

Sag, I just spoke with the service manager on the phone and I described the test method you provided. He sounded interested and was unsure if the mechanic had used the exhaust brake during the test drive. He then asked what you did to fix the problem. Since they tried turbo already, he thinks injector replacement is next, but that it'll be hard to narrow it down to one injector.

Have you seen that replacing injectors will fix this?

 

[sag2]

It could be an injector. The system is looking at a decel event when only air should be passing through the engine. Any hydrocarbon (fuel or oil) will set the fault. Before you go looking to replace $12,000 dollars of injectors without proving anything out, try the cleaning procedure. If you have a dirty injector it is not really warranty anyway and they will most likely ask for your maintenance records. With my stuff I try to never ask a question I don't already know the answer to. So if it were me I would try the cleaning procedure at least once, and two tanks of fuel can't hurt before I went too much further. Below is part of the cleaning procedure dealers are asked to use if the system has been contaminated. The only part of it you can not do on your own is the high pressure over ride. That just bumps the rail pressure up for 30 seconds to 20,000+ psi at idle to help blow out any debris in the nozzles.
It sounds like you can clear the code yourself, so give it some time and try it. There is no reason to not use the truck, I do not believe it de-rates when the fault sets. Add the cleaner in a couple of tanks, drive it hard and see what happens. Clear code as necessary until the end of the cleaning cycle, then drive normally and evaluate. I also assume you have a new fuel filter in it now? The Mopar cleaner referenced below is the CRC brand Diesel Fuel Therapy packaged for Mopar.

Pour half a bottle (approximately 15 ounces) of Mopar Diesel Fuel Injector Cleaner P/N 68194640AA into the Fuel Tank with the clean fuel.


Warm engine while checking for leaks or running concerns. Correct concerns as necessary.


Drive the truck a short distance (parking lot) and stop several times to agitate the cleaner/fuel mixture in the fuel tank. (Slosh fuel mixture in tank).


Monitor the scan tool and validate engine has reached operating temperature of 180°F (82°C).


Enable “Injector High Pressure Override” 3 times. This will stress the injectors and High Pressure Delivery Pump and circulate the cleaner/fuel mixture through the entire system.


Safely drive truck somewhat aggressively. Perform three times, wide open throttle 0 to 60 hard accelerations in a safe area to circulate cleaner and allow fuel to flush/clean injectors.


Verify repair by performing the Diesel Aftertreatment Validation - 6.7L procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

 

[Joseph Donnelly]

SAG, can you disconnect the FCA to run up the rail pressure?

 

[sag2]

SAG, can you disconnect the FCA to run up the rail pressure?

You can but it is a little hard on the fuel system. When you disconnect it the pressure spikes to maximum pressure. When the scan tool does it the pressure slowly ramps up and stays near 20,000, well below the maximum pressure.

 

[AfterBurner]

Just picked the truck up again. No CEL yet! They replaced the turbo again, and it seems to have fixed it. I won't believe till I put another 100 miles on it though. I did run injector cleaner through it before I gave it back to them last time.

 

[AfterBurner]

Fixed!

The truck was finally fixed, but it was too late... the wife already had her mind set on a new one.

 

[EDankievitch]

Wife says get a new one ya have to jump when that happens!

 

[crispyboy]

Great way to fix a problem! Too bad my wife would never speak to me this way

 

[sag2]

Great way to fix a problem! Too bad my wife would never speak to me this way

Time for a new wife???

Probably cheaper to get a new truck!