SCR disabled! All sensors disabled (DEF level, DEF temp), no need for DEF pump! List of some Kenworth delete tunings we've done We can do all models! Requirements for online tuning diagnostic adapter compatible with Insite software (Nexiq USB Link, Dearborn DPA, Inline & many others) laptop with Windows 7, 8 or 10 operating systemSCR conversion efficiency- Cummins ISB 6.7PACCAR sells the PACCAR MX and the PACCAR PX engines. The PX engines are rebranded Cummins engines, and this blog post will focus on the PACCAR MX engines. At the ECM level, the PACCAR MX engines can be broken down into two categories. The first is 2010 EPA Emissions, which covers model years 2010 through …SCR conversion efficiency- Cummins ISB 6.7Scr system altered or fault detected on t680 kenworth. 2016 kenworth t680. 512187. Trailer light not working and I - Answered by a verified Technician We use cookies to give you the best possible experience on our website.Jan 17, 2023 · At about 1:00 of the video, they show how to remove the doser SCR system altered or fault detected Model Kenworth T680 . scr system fault engine derate in less than 60 minutes We have 2016 Kenworth T680, showing that SCR System Altered or Fault Detected . Kenworth trucks are recognized as the industry standard for quality and reliability Right Front Lamp(s) Fault 2370xx. Left Rear Lamp(s) Fault 2372xx Right Rear Lamp(s) Fault 2374xx. Marker Lamp(s) Fault 2378xx. Clearance Lamp(s) Fault 2382xx Primary Fog Lamps Fault 2388xx. Secondary Fog Lamps Fault 2390xx. Left Trailer Lamp(s) Fault 2396xx. Right Trailer Lamp(s) Fault 2398xx Current Sensor Fault 2579xx. Main Light Switch Fault ...2014 Peterbilt with Aftertreatment codes..!! This was a super simple fix..!! No parts needed..!!Below are affiliate links for tools I use in this video and o...Kenworth t680 2016. I got a t680 my scr warning came on. Kenworth t680 2016. A faulty Nox sensor. Degraded DEF. A faulty DEF level, temperature or quality sensor. A faulty SCR. A faulty SCR temperature sensor. A wiring issue for one of these components.Oct 6, 2020 · 2020 Kenworth T680. Bought this truck 3 weeks ago and both the cruise and adaptive cruise worked fine. Now neither will work. Cummins Insite shows fault code 0286. Looking under the Advanced ECM Doagn … read more in the fault conditions and further diagnosis required or possible return visits in the future. The information below should be reviewed and the DEF Dosing Valve confirmed to be defective prior to replacement. Cause Codes related to SCR efficiency and the DEF dosing valve may lead to replacement of a dosing valve that is functioning properly.with an eligible SCR, only the identified replacement SCR must be used in completing this TRP. The verification and selection tool takes precedence over any other prior published service/part guidelines, for the duration of this TRP. Note : Refer to Service Manual 4022250 (ISX CM2250), Procedure #011-036, SCR Catalyst Remove and Install. 2.Kenworth t680 2016. I got a t680 my scr warning came on. Kenworth t680 2016. A faulty Nox sensor. Degraded DEF. A faulty DEF level, temperature or quality sensor. A faulty SCR. A faulty SCR temperature sensor. A wiring issue for one of these components.Kenworth Codes; Trouble Code Fault Location; P1000 – P1099 (Fuel and air metering and auxiliary emission control) P101C: BPV position fault while engine is in SCR heating mode: P101D: BPV position fault while engine is not in SCR heating mode: P101E: BPV CAN sensor has permanent governor deviation: P101F: BPV CAN sensor overload: P1020 Cummins took over supplying euro 5 complaint power plants and Kenworth have developed engine and drivetrain powerplants under PACCAR who are responsible for Kenworth in Australia. SCR technology has been in place since 2011 across their engine model range in conjunction with EGR and DPF systems to comply to Euro 5 regulations. The dreaded fault code that causes the 5 MPH derate! This fault is related to the “SCR Inducement” which is what regulates your truck to this derate. 2011-2013 EPA10 Trucks. SPN 5246 FMI 0 – SCR Inducement Final Level - Causes 5 MPH Derate; 2014-2019 GHG14, GHG17 TrucksThanks Received: 14 (10 Posts) Posts: 66 Threads: 13. Joined: Dec 2012. 1 01-29-2013, 03:57 AM. fault code on cummins 2010 ISX2 " SCR/DEF. ". insite had 3 faults, 2 of them were the voltage for HTR1, HTR2 for regen. the third fault was" RELAY POWER OUT OF RANGE " for the first 2. I checked all relays and fuses :OK.Critical SCR related fault codes have been: active for an extended period of time and. require immediate attention. Vehicle speed will be limited to 8 km [5 miles] per hour. The ECM continuously monitors the engine's fault code status to determine if any fault codes critical to successful engine . operation are active.Cummins fault. and click submit to see if your code applies, or does not apply to this article. Enter the Cummins Fault code. Submit. Customer Complaint(s): •Engine related warning lights on dash ŁPossible engine de-rate . Service Information ŁCummins ISX SCR wiring - Engine Harness ŁCummins ISX SCR wiring - DEF HarnessFault Code: Description: FMI Codes: MID 128 PID 26: Engine Fan Speed Percent: 3,8: MID 128 PID 27: EGR Valve #1 Position Sensor: 3,4,5: MID 128 PID 45: Preheater Relay Status: 3,4,5: MID 128 PID 81: ... Freightliner, Western Star, Peterbilt, Kenworth. Hino and more. Shop Diagnostic Tools. OTR Reset Tool Videos. Cummins Engine . Volvo & Mack …replacing an scr, which turns out to be quite common on these medium duty trucks. something about them idling alot and how theyre manufactured, just doesnt w...faults for these sensors and ultimately puts the system into SCR Inducement. The root cause is often related to loss of power or battery voltage and/or grounding issues. The instruction below describes the most likely causes and provides steps for troubleshooting. S y m p t o m s • Presence of P21CA along with other ACM power and communicationVehicle speed will be limited to 8 km [5 miles] per hour.This fault code is for information only, and indicates that an engine power derate and vehicle speed limit have been implemented in order to make sure that the critical SCR related fault codes that are presently active in the ECM are addressed as quickly as possible.The SCR warning is a generic warning. It could have something to do with the SCR catalyst, nox sensors or DEF system. You will need diagnostic software to determine exactly what's going on and you'll need to have it taken care of soon because eventually you'll be derated to 5mph. Ask Your Own Medium and Heavy Trucks QuestionThis document will guide the user through determining the cause of fault code 3363-16 (FC1713) on vehicles equipped with SCR. BEFORE replacing any components, verify the DEF tank coolant lines are properly routed and the Diesel Exhaust Fluid Tank Heater Valve (DEFTHV) is facing the proper direction according to the …This document will guide the user through determining the cause of fault code 3363-16 (FC1713) on vehicles equipped with SCR. BEFORE replacing any components, verify the DEF tank coolant lines are properly routed and the Diesel Exhaust Fluid Tank Heater Valve (DEFTHV) is facing the proper directionIf no voltage issue found or if fault code(s) remains active after voltage is verified correct, proceed to step 2. Step 2 Refer to Cummins Procedure 019-417 (available on Cummins QuickServe®) Follow the resistance and short circuit checks to verify the proprietary data link circuits, and or the components connected to the proprietary data link. Download Instructions. Select the FIS file for Download. Select the location: C:\intelect\INSITE\FIS. (If INSITE is installed on another drive other than C, substitute the appropriate Drive letter.) Click Save. Click "Yes" to overwrite and replace the existing file. (If the file is read only, right click on the file, select Properties, Deselect ...Here is an easy way I figure out how to get yourself from 5 miles an hour limit by removing the ABS fuse and will give you full speed but half the power to g...When it comes to heavy-duty trucks, Kenworth is a name that stands out in the industry. Known for their durability, reliability, and cutting-edge technology, Kenworth trucks are a popular choice for truck owners and operators worldwide.in this video I will show you how to clear a specific derate code. Keep in mind that not all codes can be cleared from the side of the road. For many you wil...• Aftertreatment SCR temperature sensor module ... If no voltage issue found or if fault code(s) remains active after voltage is verified correct, proceed to step 2. Step 2 Refer to Cummins Procedure 019-417 (available on Cummins QuickServe®) Follow the resistance and short circuit checks to verify the proprietary data link circuits, and or the components …In today’s fast-paced digital world, staying connected is more important than ever. Whether you rely on the internet for work, education, entertainment, or simply to keep in touch with loved ones, a reliable internet connection is essential...Diesel Technician. Vocational, Technical or Tra... 163 satisfied customers. My 2013 Kenworth screen says “exhaust (scr/def) service. My 2013 Kenworth screen says “exhaust (scr/def) service required” and has a check engine light with a wrench on the dashWhen I hook up my … read more.SCR memory reset after replacing DEF pump.in this video I will show you how to clear a specific derate code. Keep in mind that not all codes can be cleared from the side of the road. For many you wil...Kenworth T680 SCR Fault Code Problem and Solution | Trucking Vlog | OTR Life Johnny Trucking 1.68K subscribers 24K views 1 year ago I am back on the road everyone after a bit of time in the...1. Disconnect the SCR outlet NOx sensor. 2. Inspect the SCR outlet NOx sensor and harness side connector for bent, spread, or corroded pins. Is any damage found? a. Yes; repair as necessary. Verify repairs. b. No; replace the SCR outlet NOx sensor. Refer to section "Removal of the GHG14 Selective Catalytic Reduction Outlet NOx Sensor". 9 04-14Critical SCR related fault codes have been active and require immediate attention. Possible reduced engine performance.This fault code is for information only, make sure that the critical SCR tampering related fault codes that are presently active in the ECM are addressed as quickly as possible. Fault Code: 4151 PID(P): SPN: 5742 FMI: 9/9Jul 17, 2019 · Ask an Expert Car Questions Truck Repair We have 2016 Kenworth T680, showing that SCR System Altered… We have 2016 Kenworth T680, showing that SCR System Altered or Fault Detected We've never fixed ourselves. It's been always fixed at the dealership Answered in 10 minutes by: Keiphun Sowell, Field Service Technician Fault Code 3714, 3712, 6255, and 6254 Active with No Other Active Fault Codes Fault Code 3714, 3712, 6255, and 6254 Active with No Other Active Fault Codes Core Issue Confirmation Product Affected •All electronically controlled engines ... (SCR) related fault codes. For some units that have a hardwired (analog) diesel exhaust fluid (DEF) tank …One thought on “ Kenworth fault codes list ” Cruz Flores 13/08/2021. Hi I’m looking to get Service Manual w/schematig diagrams and Parts list on my 2011 T370 Kenworth with Paccar PX-6 engine. Could you please help.We have a 2015 Kenworth t680, and tonite while driving had several scr system fault messages and also our def tank is full but the low fluid red indicator on the def gauge came on. we pulled over and stopped. Mechanic's Assistant: What is the complete model and serial number of your machine? Kenworth t-680 with cummins engine vin …May 2, 2020 · Left truck running over night (was -30f), started driving in morning and started getting Engine derate in 1 hr, Power reduced due to SCR, and SCR fault detected or altered. Did a 1 hour manual regen, but codes kept showing. Had to do a load and all throughout the day I kept getting those codes, with the derate in 59minutes reseting as I was ... Fault Code 5655: SCR System Test Failing NOx Sensors on Low Hour Aftertreatment Systems Operate engine following conditions to clear the fault code. If fault codes do not return, release the unit to the customer. If fault codes return, follow the local escalation process. Document History Date 2021-8-20 Module Created Details When it comes to heavy-duty trucks, Kenworth is a name that stands out in the industry. Known for their durability, reliability, and cutting-edge technology, Kenworth trucks are a popular choice for truck owners and operators worldwide.Kenworth t680 2016. I got a t680 my scr warning came on. Kenworth t680 2016. A faulty Nox sensor. Degraded DEF. A faulty DEF level, temperature or quality sensor. A faulty SCR. A faulty SCR temperature sensor. A wiring issue for one of these components.FAULT CODE 2771 - Aftertreatment 1 Outlet NOx Sensor - Abnormal Update Rate Associated Procedures Procedure Title Procedure Number Service Model Name Bulletin Number Data Link Circuit, Proprietary ... • Disconnect the aftertreatment outlet NOx sensor from the SCR aftertreatment interface harness. • Turn keyswitch ON. …the replacement SCR to use for the repair. DO NOT refer to the TSB130099 list of SCR replacements. This TRP takes precedence for the life of the field action. If the SCR catalyst has the dimples shown in the TSB, the SCR DOES NOT need to be replaced. File for only the appropriate Admin Time (00-90x) and Campaign Check (17-902). 2.This document will guide the user through determining the cause of fault code 3363-16 (FC1713) on vehicles equipped with SCR. BEFORE replacing any components, verify the DEF tank coolant lines are properly routed and the Diesel Exhaust Fluid Tank Heater Valve (DEFTHV) is facing the proper directionThanks Received: 14 (10 Posts) Posts: 66 Threads: 13. Joined: Dec 2012. 1 01-29-2013, 03:57 AM. fault code on cummins 2010 ISX2 " SCR/DEF. ". insite had 3 faults, 2 of them were the voltage for HTR1, HTR2 for regen. the third fault was" RELAY POWER OUT OF RANGE " for the first 2. I checked all relays and fuses :OK.RE: Insite Help exhaust (SCR/DEF) service required. This is shop talk by cummins: This fault detects a mechanical malfunction of the DEF dosing valve, or a pin-to-pin short in the DEF dosing valve circuit. Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.The SCR warning is a generic warning. It could have something to do with the SCR catalyst, nox sensors or DEF system. You will need diagnostic software to determine exactly what's going on and you'll need to have it taken care of soon because eventually you'll be derated to 5mph. Ask Your Own Medium and Heavy Trucks QuestionThere are multiple levels of engine power derates, known as inducements, that are enforced when a fault condition exists. For a Urea Quality Sensor (UQS) fault, the steps are: warning, torque derate 1, torque derate 2, then severe derate. The first step, warning, will turn on a check engine light and/or a MIL light.DEF Tank What Are the Benefits of SCR? Simply stated, SCR improves engine fuel economy and increases engine reliability. Compared to 2007 emissions technology, …Cummins fault. and click submit to see if your code applies, or does not apply to this article. Enter the Cummins Fault code. Submit. Customer Complaint(s): •Engine related warning lights on dash ŁPossible engine de-rate . Service Information ŁCummins ISX SCR wiring - Engine Harness ŁCummins ISX SCR wiring - DEF Harness In today’s fast-paced digital world, having a reliable landline connection is crucial for both personal and business communication. When it comes to landline services, BT (British Telecom) is one of the leading providers in the United Kingd...Kenworth Codes; Trouble Code Fault Location; P1000 – P1099 (Fuel and air metering and auxiliary emission control) P101C: BPV position fault while engine is in SCR heating mode: P101D: BPV position fault while engine is not in SCR heating mode: P101E: BPV CAN sensor has permanent governor deviation: P101F: BPV CAN sensor overload: P1020: …I have a 2017 kenworth t680 cummins isx and the scr system fault code came on my dash, I replaced the outlet nox sensor just now and did a force regen and the service and check engine is still om On* … read moreThe number one cause of a 5 MPH derate in a Volvo truck is the SCR/DEF system not operating properly. The SCR/DEF system was implemented in Volvo Trucks 2011+ to curb exhaust emissions on Class 8 trucks. 3. Method for diagnosing a fault of an scr system – Google Patents.Oct 25, 2023 · RE: Insite Help exhaust (SCR/DEF) service required. This is shop talk by cummins: This fault detects a mechanical malfunction of the DEF dosing valve, or a pin-to-pin short in the DEF dosing valve circuit. Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM. Kenworth T680 SCR Fault Code Problem and Solution | Trucking Vlog | OTR Life Johnny Trucking 1.68K subscribers 24K views 1 year ago I am back on the road everyone after a bit of time in the...Dash shows, SCR System Fault, Engine will Derate in <60 mins.. please help me.. Dealer says they cant take me in til Monday. Click to expand... That has to be repaired at the pete shop unfortunately. georgejansen, Jul 21, 2021. georgejansen, Jul 21, 2021 #50 + Quote Reply. Trucking Jobs in 30 seconds.Nov 3, 2022 · 10. Kenworth SCR Blues – Page 1 | TruckingTruth Forum. Kenworth SCR Blues – Page 1 | TruckingTruth Forum … start the engine, lo and behold there is an SCR system fault message. … get a re-power, limp to another close by shop (Kenworth), get “fixed”, … First, a little background. SCR memory reset after replacing DEF pump.March 20, 2023 by Bikash Roy There are a few things you can do to fix a SCR system fault on your Peterbilt truck. First, check the DEF level and make sure it is full. If it is low, fill it up and see if that clears the error. Next, check all the DEF lines and connections for leaks. If you find any leaks, repair them and see if that fixes the issue.Dash view, SCR System Fault, Machine determination Derate in <60 mins.. please help me.. Dealer says they cant take you in til Monday. AlexD13, Aug 6, 2016. AlexD13, Aug 6, 2016 #1 + Quote Replies. Trucking Jobs included 30 seconds. Ever month 400 people discover one job with the help of TruckersReport.Scr system ALTERED or fault detected shoe me. 2015 kenwort t680 comunies engine. And also cheak engine is comes on - Answered by a verified Technician We use cookies to give you the best possible experience on our website.3. Check for multiple fault codes. Are there any other fault codes present for the SCR outlet NOx sensor? a. Yes; diagnose the other fault codes first. b. No; Go to step 4. WARNING: HOT EXHAUST During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be ...The dreaded fault code that causes the 5 MPH derate! This fault is related to the “SCR Inducement” which is what regulates your truck to this derate. Cummins Fault Code – 3712 or SPN 5246 FMI 0; Notification – Red Stop Engine Light On; Information – Aftertreatment SCR Operator Inducement – Data Valid But Above Normal Operating Range – Most …How to Fix SCR system fault Kenworth? – Instructions and Videos Written by Robert Aksamit in Automotive, How to Fix When we talk about diesel fuel, one of the most common unknown words is SCR. What does SCR mean on a Kenworth? How to Fix SCR system fault Kenworth? What exactly does SCR delete mean? Conclusion Related posts: Sep 17, 2020 · Follow the test procedure and your specs are also covered below. P3844. Code number. P3844. Fault code description. DEF dosing valve - Current too low or open circuit on ECU D374 pin A77 or pin A53. Fault code information. 1 trip MIL 3 drive cycle recovery Readiness group – None Freeze frame type – Comprehensive. Description of component (s) The dreaded fault code that causes the 5 MPH derate! This fault is related to the “SCR Inducement” which is what regulates your truck to this derate. Cummins Fault Code – 3712 or SPN 5246 FMI 0. Notification – Red Stop Engine Light On. Information – Aftertreatment SCR Operator Inducement – Data Valid But Above Normal Operating Range ... If experiencing multiple faults related to the Aftertreament, DEF, or SCR on a vehicle with a Cummins ISX 15L, locate the ECM power and ground wires and inspect the connections. 1. For vehicles built before September 23, 2013, inspect connector 1027 - ECM Battery Feed, which is secured to the J-Tray Starter ... Fault Codes and Dashboard Indicator Lights: …Yes; perform a parked regeneration to verify repairs and clear fault codes. b. No; Go to step 2. 2. Using a refractometer from the DEF Test Kit W060589001900, measure the DEF percentage. Is DEF percentage between 28 to 36%? a. Yes; Go to step 3. b. No; clean/flush the DEF tank, then Go to step 7. ... (SCR) Inlet Temperature • AS019 SCR Outlet …Guided Diagnostics for SCR efficiency or NOx sensor fault codes will often result in No Fault Found. This often leads to replacement of one or both sensors despite no indication from diagnostic steps to do so. NOx sensor function is a possible cause, and is listed as such for the code description in the DTC description in Premium Tech Tool ( PTT ).Thanks Received: 14 (10 Posts) Posts: 66 Threads: 13. Joined: Dec 2012. 1 01-29-2013, 03:57 AM. fault code on cummins 2010 ISX2 " SCR/DEF. ". insite had 3 faults, 2 of them were the voltage for HTR1, HTR2 for regen. the third fault was" RELAY POWER OUT OF RANGE " for the first 2. I checked all relays and fuses :OK.RE: Insite Help exhaust (SCR/DEF) service required. This is shop talk by cummins: This fault detects a mechanical malfunction of the DEF dosing valve, or a pin-to-pin short in the DEF dosing valve circuit. Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.Critical SCR related fault codes have been: active for an extended period of time and. require immediate attention. Vehicle speed will be limited to 8 km [5 miles] per hour. The ECM continuously monitors the engine's fault code status to determine if any fault codes critical to successful engine . operation are active.This document will guide the user through determining the cause of fault code 3363-16 (FC1713) on vehicles equipped with SCR. BEFORE replacing any components, verify the DEF tank coolant lines are properly routed and the Diesel Exhaust Fluid Tank Heater Valve (DEFTHV) is facing the proper direction according to the …
Cummins took over supplying euro 5 complaint power plants and Kenworth have developed engine and drivetrain powerplants under PACCAR who are responsible for Kenworth in Australia. SCR technology has been in place since 2011 across their engine model range in conjunction with EGR and DPF systems to comply to Euro 5 regulations.. Marina del rey wave mound
Aug 16, 2021 · I originally received the SCR default code on my 2015 kenworth t680 Paccar, it then derated to 5mph with a fault code for dpf doser. I've had the doser valve and filters replaced , however I'm still g … read more One thought on “ Kenworth fault codes list ” Cruz Flores 13/08/2021. Hi I’m looking to get Service Manual w/schematig diagrams and Parts list on my 2011 T370 Kenworth with Paccar PX-6 engine. Could you please help.I originally received the SCR default code on my 2015. I originally received the SCR default code on my 2015 kenworth t680 Paccar, it then derated to 5mph with a fault code for dpf doser. I've had the doser … read more. Nich1019. Cummins/Caterpillar Techni... Vocational, Technical or Tra... 6,337 satisfied customers.10. Kenworth SCR Blues – Page 1 | TruckingTruth Forum. Kenworth SCR Blues – Page 1 | TruckingTruth Forum … start the engine, lo and behold there is an SCR system fault message. … get a re-power, limp to another close by shop (Kenworth), get “fixed”, … First, a little background.1 01-29-2013, 03:57 AM fault code on cummins 2010 ISX2 " SCR/DEF. " insite had 3 faults, 2 of them were the voltage for HTR1, HTR2 for regen. the third fault was" RELAY …2 Action FIX-AS-FAIL Kenworth offers additional troubleshooting steps via SupportLink for fault codes P3818, P3830, P3997, P3928 and, P3914 for all PACCAR MX-13 EPA 2013 Engines. The procedures below should ONLY be followed for repeat SCR fault codes. See the Procedure section below. Warranty Fault Code: 3712 PID: P105 SPN: 5246 FMI: 0 LAMP: Red SRT: Aftertreatment SCR Operator Inducement - Data Valid But Above Normal Operational Range - Most Severe Level. Critical SCR related fault codes have been active for an extended period of time and require immediate attention. Immediate engine power derate.2020 Kenworth T680. Bought this truck 3 weeks ago and both the cruise and adaptive cruise worked fine. Now neither will work. Cummins Insite shows fault code 0286. Looking under the Advanced ECM Doagn … read moreDiesel Technician. Vocational, Technical or Tra... 158 satisfied customers. 2019 Kenworth t880 mx13 stop engine immediately only fault. 2019 Kenworth t880 mx13 stop engine immediately only fault code i get is p1514 I am currently doing a forest region to see if that helps … read more.I have had a 2013 Pete with an ISX15 CM2350 550HP in the shop several times over the past month that is driving me nuts. It sets fault code 3714 - Engine Protection Torque Derate - Condition Exists. The driver display says 25% torque derate in 3 hours. It starts to count down, but never goes 3 hours until it clears itself.Kenworth. C500. DPF EGR DEF SCR. Requirements for online tuning. diagnostic adapter compatible with Insite software. (Nexiq USB Link, Dearborn DPA, Inline & many others) laptop with Windows 7, 8 or 10 operating system. internet connection. Tuning specification.Jul 14, 2022 · i have a scr fault code on a 2016 Kenworth with a paccar MX13. the code from davies is a 1514 and says doser issue. I also have the red light on the gauge for the def. I replaced the def level sensor and also the doser. I cannot get the lights to turn off. i did a regen, several times now and also checked the scr on davies. Truck runs fine. Nov 8, 2022 · 10. Kenworth SCR Blues – Page 1 | TruckingTruth Forum. Kenworth SCR Blues – Page 1 | TruckingTruth Forum … start the engine, lo and behold there is an SCR system fault message. … get a re-power, limp to another close by shop (Kenworth), get “fixed”, … First, a little background. DIAGNOSING SELECTIVE CATALYST REDUCTION (SCR) EFFICIENCY FAULTS MODEL E90 (335d) E70 (X5 xDrive35d) SITUATION The Service Engine Soon light is on. The mileage countdown warning to a no start condition is displayed in the Control Display for incorrect exhaust fluid added. One or more of the following fault codes are stored in the DDE: M57Y:.