Each company we work with has specific experience requirements for their drivers. In order for you to receive the best possible offers, please make sure your answers above are accurate prior to submitting. Log in or Sign up. Find Trucking Jobs. Jul 13, 1. I have had this problems and was able to fix them so for future guide I decided to write in "English", what you are facing and solutions.
Spn 7 is basically telling you that no or little def is reaching the meter unit and is not spraying enough of it to the aftermath treatment. There's many possibilities, but you should check in a priority order. A Do you have spn 1 also present?
If answer is yes, you most likely got a bad air pressure limiting unit. The unit is connected directly to your secondary air tank, any leak of oil or moisture will deteriorate the unit it just won't do its job no more.
Best way to check this is dismaying the air hose from the meter unit and start the truck. Leave it running for a few minutes and then stop it.How to fix DEF metering valve on freightliner cascadia clear code snp 4364 / SPN 3361
Replace all hoses and the unit itself. Install a air compressor filter so to protect the unit in the future. Don't go crazy by a bit of oil and replace the compressor etc. Check it on pic 1. B spn 1 only, which is unlikely but possible, the meter unit is not getting air, so there's basically 3 possibilities, 1 meter unit is clogged with crystalized def, 2 a hose broke and leaks air or 3 the pressure limiting unit got the same problem as above. Unasemble the passenger side skirt, take the iron box protecting the meter unit is on your left, visually check for crystalized def, take the hose out and unassemble the valve check for any contamination and or crystalized def.
If you see any flush the meter unit as directed by freightliner, you'll need to remove the meter unit which is a pain in the rear so if you're not a wrench guy take it to a dealer. If any of the hoses has a severe leak you should have noted that on your dashboard already, if that and the code are present simple math are correct, a hose is bad.
That will do with spn 1 7 is similar but instead of air is def. There are several hose lines that keeps your def flowing they are the blue hoses you see on top of your def tank. You got a pump, a filter and also is air.By KyleMarch 14, in Engine and Transmission. What causes a SCR catalyst to go bad. I'm guessing over dozing of def fluid, or soot buildup. Ran SCR system text and every thing check out good, fluid dozing measures to spec.
I replaced dozer to be sure it didn't hang open at times maybe. Well hell, idk the dealer said they have seen only on bad. I hade one throwing a dozer code every thing was workin fine food def quality, all test checked out good.
Replaced dozer did several regens and rest drives long ones code would clear then come back right after putting back into service. We had a new wrecked truck out back with only miles. Put that catalyst on the truck ran one regen and no problems sense. And now there is another on that seams to be bad. If the fault can be cleared after the regen the problem is most likely fixed, but faults can be a pain to repair. Never heard of the SCR " mixing box" go bad. Are you doing the crystal sublimation regens?
They are different type or regen that dont dose DEF and get hotter. There is a Mack service bulletin that has some tips on the code.
I cant seem to attach the bulletin or even make a copy of it for some reason. Did all the DEF doser test and all good. I do about 1 a week of these. Getting the sensors now. Haven't had a chance to get back to that truck yet.
A lot of brake downs lately. I will def. Thanks for all the help. Doing another NOX sensor replacement this morning.The ability to display diagnostic trouble codes DTC is an optional feature.
Codes may be displayed on either the gauge cluster or an optional vehicle information display VID. The vehicle must be equipped with the option to display codes in both cases. Codes will not be displayed on the gauge cluster if the vehicle is equipped with the VID.
A gauge sweep will be performed on the gauges. The gauge cluster will then display the following information for 5 seconds:. If faults are present, the gauge cluster display will show each diagnostic trouble code for 10 seconds and then automatically scroll to the next entry and continue to cycle through the faults.
Once all faults have been displayed the number of faults will be displayed again, then the cycle will repeat. To manually cycle through the fault list press and release the cluster display selector button. The following information will be displayed for each fault:. Source addresses and DTC descriptions are presented in plain text.
Cummins Fault Codes
NOTE — The following selections will not be available if the vehicle is not equipped with the option to display codes. Scroll through the list of faults if faults are present. Some previously active codes may not be cleared by this method. A High Battery Cutout fault has. A high Battery Cutout fault has. A Low Battery Cutout fault has. A low Battery Cutout fault has. A Surge may have occurred for a while in occurred and the source of the fault is the AC module inverter high voltage bus.
An Overload condition has been.Discussion in ' Freightliner Forum ' started by mhynNov 28, Each company we work with has specific experience requirements for their drivers. In order for you to receive the best possible offers, please make sure your answers above are accurate prior to submitting. Log in or Sign up.
Find Trucking Jobs. Nov 28, 1. I want to share my story about repair of this code. The driver called my a week ago and told me that on uphills this code pops up. Only on uphills and only this code.
I did all procedures as mentioned in PSL for this code troubleshooting checking the screens, puling def lines and checking them, running air pressure test by DL, Nothing was found. I repeated the procedures three times. I cleared the code and sent truck to work. I don't like to throw parts on truck to see what will happen. The driver called again same day and said the code pops up again. What is interesting about this code that if DEF pressure goes back to normal you can cycle ignition key and amber check engine light will be off.
Again did all procedures and checked all wirings. Again nothing suspicion was found.
Cascadia spn 4334 7 / 4335 1 guide to fixing
I was thinking ACM is malfunctioning and I was about to call the dealer. Then changed my mind and said myself lets do the dealer way.To determine the malfunction, you just need to write out the fault code from the device in the cab and find the codes in the table by selecting your own engine type. Use of materials placed on this site is allowed only if there is an active link to Truckmanualshub. If you have any questions, please contact with us. Related Posts. Cummins ISX engine fault codes.
Necessary Necessary. Circuit of the speed sensor and the position of the crankshaft-no two signals from the sensor. Circuit of the pressure sensor in the highway control the angle of fuel injection-short circuit.
Circuit of the pressure sensor in the line of control of the fuel injection lead angle-chain breakage. Circuit of the speed sensor and the position of the crankshaft-the absence of one of the two sensor signals. Fault codes detected in other control units were found. Verification is required. Incorrect data transmission on the J bus from the position sensor of the remote pedal. The circuit of the switch of activation of Multimotor synchronization-incorrect data.
Circuit of the air temperature sensor at the entrance to the turbocharger-short circuit left row of cylinders, first stage. Circuit of the air temperature sensor at the entrance to the turbocharger-breakage of the chain left row of cylinders, second stage. Circuit of the air temperature sensor at the entrance to the turbocharger-short circuit right row of cylinders, first stage. Circuit of the air temperature sensor at the entrance to the turbocharger-breakage of the chain right row of cylinders, second stage.
Engine parameters Recording system at the moment of error occurrence-free memory at the same time. Engine parameters Recording system at the moment of error occurrence-free memory is over. Incorrect amount of fuel in the nozzle in the One of the first three cylinders. Incorrect amount of fuel in the nozzle in one of the cylinders from the 4th to the 6th. Signal error from external device turbocharger Variable geometry or transmission.
Frisky increase in temperature in inlet manifold front manifold left row of cylinders. The chain of the oil pressure sensor after the oil filter is a breakage of the chain. Sharp rise in temperature in the inlet manifold rear manifold of the left row of cylinders.
Sharp rise in temperature in the inlet manifold front manifold right row of cylinders. A sharp rise in the temperature in the inlet manifold rear Collector Right Series Cylinders. The air temperature in the inlet manifold is too high the middle collector is the left row of cylinders. Circuit of the air temperature sensor in the inlet manifold-short circuit middle collector left row of cylinders. Circuit of the air temperature sensor in the inlet manifold-breakage of the chain middle collector left row of cylinders.
Sharp rise in temperature in the inlet manifold middle collector left row of cylinders. The air temperature in the inlet manifold is too high the middle manifold is the right row of cylinders. Air temperature sensor circuit in inlet manifold-short circuit medium Collector Right Series Cylinders.February Additions, Revisions, or Updates. Section Title. EPA10 DD. All information subject to change without notice. Monitored Parameter. Typical Enabling Conditions. Monitor Sequence.
Hour engine OFF time. Execution Frequency. Continuous when enabling conditions met. Typical Duration. Dash Lamps. Engine Reaction. SCR Quantity Test. Connect DDDL 7.
Yes; Go to step 8. No; Go to step 5. Remove the DEF metering unit air pressure sensor, and re-connect harness to connector.
No, replace the DEF pressure sensor. Verify ACM software level is version 8. Flush warm water into all cavities as illustrated in the figure below. Reinstall all components. Perform SCR air pressure test 60 second duration and record results. Refer to chart below for next action.Especially when Amazon change the rulebook. Download this E-book to learn how to launch a product without incentivised reviews.
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