Truck That Keeps on Giving

Hi all!

This is my first post here, though I’ve been doing a lot of reading on here. Sorry for the long post!!

My fiancé purchased a used Freightliner DD15 back in February. We’ve been having issues after issue, out of 4 months we’ve been in the shop I think 3. We’ve had major work, thankfully most of it cover by warranty. We’ve had the cylinders replaced, head gasket, one box, filters, you name it. Some of these components replaced more than once. We’ve had Detroit, Freightliner Corp. involved in this ordeal.

After 3 weeks of the truck running fine, we are back in the shop, same issue lights go on and the truck derates to 5mph. We are at a loss here as we’ve spent more time in the shop than running the truck.

Trying to see if anyone could offer some clues as to what could be wrong. We’ve even considered getting rid of the truck.
Below are the codes the shop informed us we are getting now:

“COMPLAINT CAUSE CORRECTION
6/11/2021
CUST PO # CUSTOMER UNIT # VIN ADVISOR TERMS
3367 1FUJGLDR2HLHX1964 FREIGHTLINER CASCADIA 125 505870
Sold Operations
EA Express Assesment
CHECK ENGINE LIGHT AND BEGAN SMOKING PLEASE CHECK AND ADVISE (SEE RECENT REPAIRS)
HOOKED DIAGNOSTIC LINK TO TRUCK AND FOUND CODE 5363/18 = ENGINE SMOOTHNESS CONTROL / CYLINDER 6 QUANITY EXCESS AND CODE 3556/0 =REGEN TEMPERATURE - OUT OF RANGE ( BOTH ACTIVE) PRINTED TS STEPS AND 5363/18 REFERS TO FOLLOW TS STEPS FOR 5363/17 =GHH17. PRINED TS STEPS AND FOLLOWED , 1 = DOES ENGINE EXHIBIT KNOCKING NOISE = NO , GO TO STEP 4 TEST DRIVE TRUCK - CHECK FOR DRIVE TRAIN VIBRATION = COULD NOT PERFROM TEST DRIVE FOR TRUCK WANTS TO SHUT DOWN = 5 FOUND NONE OF FOLLOWING CODES 656/ANY = 3664/ANY = 7389/ANY =2798/ANY =4258/ANY =1322/ANY =5357/ANY =190/0,14 OR 15 =636/ 2,8,10,OR 11 =157/ANY =164/ANY =520268/ANY //// GO TO 6 = CHECKED LIFE TO DATE PEAK RPM ON DDEC REPORT = 1867 = NOT GREATER THAN VALUES /// = NO , GO TO 8 / CONNECTED BATTERY CHARGER TO MAINTAIN SUFFICIENT BATTERY VOLTAGE ///9 =USED DIAGNOSTIC LINK AND PERFORMED RELATIVE CYLINDER COMPRESSION TEST , = NO = DID NOT READ FOR ANY CYLINDER OUT OF SPEC /// 1=97.5 //2=93.5 /// 3=98,5 /// 4=95.5 // 5=96 /// 6=100. ///// NO GO TO STEP 19 = REMOVE AND INSPECT OIL FILTER = IS THERE AN EXCESSIVE AMOUNT OF METAL PRESENT IN THE OIL FILTER = NO ; STATED TO REPLACE CYLINDER #6 FUEL INJECTOR , ADVISE TO INSPECT HARNESS'S WHILE ROCKER COVER IS REMOVED , ADVISE TO PERFORM VALVE ADJUSTMENT AND INSPECT ROCKERS AND VALVE STEMS, REPLACE ROCKER COVER GASKET AND ENGINE AIR FILTER. ADDITION DIAG WILL BE REQUIRED , TO PERFORM LOW TEMP ATD REGEN AND MONITOR DOC OULET TEMP SENSOR AFTER 20 MIN AND IF READING IS NOT WITHIN 45 DEGREE OF OTHER TEMP SENSORS THE DOC OUTLET TEMP SENSOR WILL NEED REPLACED, OR THE HC DOSER
BLOCK = DETERMINED BY TEST RESULTS. === WILL NEED TO REPLACE # 6 INJECTOR”


Thanks for any guidance you can provide!

M “frustrated trucker chik”

 

it is a 2017 Freightliner Cascadia: engine DD15.

 

It looks like they want to replace the injector, but this will be about the 4th or 5th time the injector gets replaced in less than 5 months!!! So that tells me this truck has an issue that no one has really been able to get to the bottom of it.

 

They haven’t done the thermal scanner this time around, as the truck keeps shutting off, but will ask if they can do that. I’m assuming they have check wires, etc, but one issue I’m noticing with a lot of these shops is they just go by the codes the truck is giving, but they don’t make an effort to get to the root cause. The only one that have done that so far was in Tolleson. But when a truck keeps on breaking down with same issue it tells me they really haven’t found what’s truly causing it.

We’ve used a different shop every time. The truck gets fixed, we run and it breaks down, sometimes the truck will run 3 weeks once it has been fixed, a few days and in one instance it broke down within two hours of leaving the shop!. We’ve been to shops on WV, Flagstaff and Tolleson, AZ, New Mexico, Florida. We spent one month at the Tolleson location while they tried to figure out the issue, and then replaced the head gasket.

It really is very frustrating.

Thanks!