Freightliner cascadia fault codes

Covers: Freightliner Cascadia CAN fault codes Format: PDF files (zipped) Works with: Windows/Mac computers Notes: Printable Contains fault code listings, symptoms, conditions, repair actions, notes, etc… SAM Cab CAN Fault Codes 6.0 SAM Chassis CAN Fault Codes 6.0 MSF CAN Fault Codes 6.0 Central Gateway CAN Fault Codes 6.0 Free download We also carry the […]

Jun 10, 2015 · This diagnostic code is typically Regulatory Fault Ignored - Derate On. Note: (EPA10 ONLY) If SPN 5246/FMI 0, 15 or 16 are the only fault(s) present, follow troubleshooting procedure for SPN 3361/FMI 7 (DEF Unit - Unable to clear Restriction). The 3361/FMI 7 code, is more then likely your metering unit is stopped up and needs flushed. Don't forget to Subscribe! - https://goo.gl/XtV9CJCheck out our Merch! - https://thedieseler.myteespring.co/Support these videos on …a. Yes; repair those fault codes first. b. No; Go to step 3. NOTICE: Do not attempt to operate engine with the DEF lines disconnected. DEF pump runs and circulates DEF through the system at a limited rate (default) to aid in system cooling. WARNING: PERSONAL INJURYAbout Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Jun 10, 2015 · This diagnostic code is typically Regulatory Fault Ignored - Derate On. Note: (EPA10 ONLY) If SPN 5246/FMI 0, 15 or 16 are the only fault(s) present, follow troubleshooting procedure for SPN 3361/FMI 7 (DEF Unit - Unable to clear Restriction). The 3361/FMI 7 code, is more then likely your metering unit is stopped up and needs flushed.

Line Heater 2 Open Circuit. Show/Hide Checkboxes. Check for multiple codes. If SPN 4355/FMI 5 and SPN 4354/FMI 5 are present, repair open between pin 9 of the ACM 120-pin connector and pin 2 of line heaters 2 and 1. If only SPN 4355/FMI 5 is present, Go to step 2. Disconnect line heater 2. Turn the ignition ON (key ON, engine OFF).Feb 23, 2020 ... Comments104 ; Freightliner Detroit Check Engine Codes. Double D Distribution · 111K views ; Prime Inc. Makes Public Announcement To 9442 Truck ...Here I show you what code SPN 4354 FMI 5 can be! AFT 1 SCR Catalyst Reagent LineHeater 1Current below Normal or Open Circuit. Here we found the cable was cut...Sep 3, 2020 ... Comments51 · Regen Temperature, out of range low. · Freightliner Cascadia Blinking Def Light w/ Codes and Derate · NOx efficiency low, SPN 4364...Bendix SPN 1045 FMI 2. This fault code system is a bit different from the SPN FMI code system. It relies on the blink factor and if you are not careful, you may miscount and be led to the wrong fault code. If you look at the fault code list for Bendix, you will find it under the Misc. DTC code list. The blink code is on the left-hand side and ...

2016 Freightliner Cascadia Technical Service Bulletins. ... Resolves an issue where fault codes may be introduced after reprogramm . Communication Number: WP20-006, Date: 2020-04-23 Category: 350000 EQUIPMENT Summary: Warranty Policy Letter for Handling for Authorized Service Location Part Transfers. To promote 24-hour …639 n/a Roll Call Fault Any other J1939 device that the ICU expects on the network but is not broadcasting will generate a fault code. The source address will be of the device that the ICU is not receiving messages from. Note that this is actually an ICU generated fault code. Ask Your Own Medium and Heavy Trucks Question.4. Does the fault code go inactive when a component is disconnected? a. Yes; Go to step 5. b. No; Go to step 6. 5. For the component in question, inspect the harness connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins and signs of moisture in the connector or wire damage near the connector. Are any signs of ...Here I show you what code SPN 4354 FMI 5 can be! AFT 1 SCR Catalyst Reagent LineHeater 1Current below Normal or Open Circuit. Here we found the cable was cut...2016 Freightliner Cascadia dd15 Detroit engine. I have a fault code on. It istxld: 61 SPN: 3556 Aftertreatment 1 hydrocarbon Doser 1 FMI 18 (low-moderate severity) count 1Can you help me with what thi … read more

Godzilla minus one showtimes near uec theatres 11.

I have fault code 2019 freightliner cascadia DD15. Mechanic's Assistant: I understand that you have a fault code on your 2015 Freightliner Cascadia with a DD15 engine, and the truck Mechanic will be able to help you with this issue. Have you noticed any specific issues or issues with your truck besides the fault code? Summary: Service Bulletin for Marker Light Gasket Leaks, New Cascadia. This bulletin replaces the version dated June 17,2019. A procedure has been added for inspection, repair, and replacement of damaged or spun rivet nuts. Communication Number: DASHLiftAxle, Date: 2020-04-27. Category: 100000 POWER TRAIN. I have a 2011 Freightliner Cascadia with a solid ABS light that stays on after start-up and never goes off. I also have an ABS 11 fault code (SPN 793). From what I can gather on the internet, this fault code is referring to my Left 3rd axle wheel speed sensor.I've got a 2012 freightliner cascadia once in a while I get a fault code of Cab 33 SPN 521916. The only real issue I have is that the marker light on...In today’s advanced automotive world, diagnostic fault codes play a crucial role in identifying and resolving issues within vehicles. These codes are generated by the onboard compu...2014 Freightliner Cascadia DD13 fault code spn 641 fmi 5 followed diag I have 12 volts on pin 1, 1.9 volts on pin 2 and - Answered by a verified Technician We use cookies to give you the best possible experience on our website.

a. Yes; repair those fault codes first. b. No; Go to step 3. NOTICE: Do not attempt to operate engine with the DEF lines disconnected. DEF pump runs and circulates DEF …Freightliner cascadia fault code help! Discussion in 'Ask An Owner Operator' started by TRS Group, Sep 28, 2019. Sep 28, 2019 #1. TRS Group Light Load Member. 93 117. Sep 24, 2018 0. I've got a 2012 freightliner cascadia once in a while I get a fault code of Cab 33 SPN 521916. The only real issue I have is that the marker light …DOC Inlet Pressure Sensor part number A4721530928DPF Outlet Pressure Sensor part number A4721531028Silicone Hose to connect sensor to metal line going … b. No; update the ACM using the latest server information. Perform the repair verification. If the fault returns, Go to step 4. 4. Check for other emission-related fault codes. Are there any Selective Catalyst Reduction (SCR) or Diesel Particulate Filter (DPF) related fault codes present? a. Yes; diagnose and repair the emission-related fault ... 2011 Freightliner Cascadia DD15 Fault Codes Discussion in 'Freightliner Forum' started by Juan0038, Mar 7, 2016. Mar 7, 2016 #1. Juan0038 Bobtail ...Feb 22, 2011. 0. CHS 71 is a general chassis fault code. First thing to check is the fuses in the fuse box on the firewall. In this case it was a blown trailer brake light fuse. Replaced fuse and code went away. Colorato, Oct 12, 2012. #2. …Freightliner Fault Codes - Free download as PDF File (.pdf) or read online for free. Freightliner Fault CodesMasterTech Mike. Lead Diagnostic Technician. Academic Honors Diploma. 1 satisfied customers. Fault Code. 2018 freightliner cascadia. TxId: 33 SPN: 520762. TxId: 33 SPN: 520762 – Manufacturer Assignable SPN FMI: 3 (Voltage Above Normal) Count: 13 TxId: 61 SPN: 520372 – Manufacturer Assignable … read more.

A financial planner explains why so many clients ignore good advice. Hint: It's not the clients' fault. By clicking "TRY IT", I agree to receive newsletters and promotions from Mo...

Description The Fault Indicates High DEF Delivery Monitored Parameter NOx Conversion Efficiency Typical Enabling Conditions Closed Loop DEF Dosing Monitor Sequence None Execution Frequency Always Enabled Typical Duration Two Seconds Dash Lamps None Engine Reaction None Verification Parked SCR Efficiency Test Check as follows: 1. …The Spn 3238 Fmi 2 problem code is about Nox Out Sensor Not Ready After Dewpoint Enable Check: Aftertreatment 1 Exhaust Dew Point Data Erratic, Intermittent Or Incorrect. The last 5 words are from the FDMI portion of the code. To learn more about this code and what to do to fix it, just continue to read our article.I have a 2013 frieghtliner cascadia cummins isx engine. I have 5 fault codes, some are the same. Fault 1: chs 71 SPn 520919 fail 05 Fault 2: cab 33 SPn 522116 fail 02 Fault 3: ecu 0 SPn 3362 fail 31 F … read moreI have 2017 FreightLiner Cascadia 3AKJGLDR3HSHR5887 Vehicle Attributes Engine: 6 - 14.8L 903ci DIESEL type DD15 - Submodel: 125 Body Type: Tractor Truck - Long Conventional Drive Type: 6 X 4 One Active Code DPFFilter Efficiency Too Low No Associated Parameter SPN 520349 FMI14.Feb 22, 2011. 0. CHS 71 is a general chassis fault code. First thing to check is the fuses in the fuse box on the firewall. In this case it was a blown trailer brake light fuse. Replaced fuse and code went away. Colorato, Oct 12, 2012. #2. …If active fault codes are displayed on the diagnostic information screens, make a note of the fault code and text message, then take the vehicle to an authorized Freightliner service facility See Fig. 4.19 for a diagram of the diagnostic information screens.About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...The ADs are identified in DiagnosticLink by the magic wand icon next to the fault, and the word "Advanced" label in the "Troubleshooting Type" field. SCR NOx Conversion Efficiency. SPN 4364/FMI 17. DescriptionThis Code Sets When the Aftertreatment Control Module (ACM) Detects Poor Selective Catalyst Reduction (SCR) NOx Conversion Efficiency.Fault Code. 2018 freightliner cascadia. TxId: 33 SPN: 520762. TxId: 33 SPN: 520762 – Manufacturer Assignable SPN FMI: 3 (Voltage Above Normal) Count: 13 TxId: 61 SPN: 520372 – Manufacturer Assignable SPN FMI: 16 (High—moderate severity) Count: 1 TxId: 61 SPN: 5841 – Diesel Exhaust Fluid Quality Malfunction FMI: 14 (Special …

Big meech daughter neeka.

Teaira mccowan net worth.

Do not paint or affix items over the distance sensor cover. If attachments are mounted in front of the distance sensor, such as a crash guard, they can impair the operation of the distance sensor. Fig. 5.1, Forward Radar Location. To avoid malfunctions, clean the cover of the distance sensor regularly. I've got a 2012 freightliner cascadia once in a while I get a fault code of Cab 33 SPN 521916. The only real issue I have is that the marker light on...Has setting limits not worked? Despite your efforts, are your boundaries often ignored? It’s frustrating, to Has setting limits not worked? Despite your efforts, are your boundarie...Upon startup today the truck threw a CAB 33 fault code. Last time this happened it was as simple as replacing a head light. After full inspection today I was unable to diagnose the issue. ... -2012 Freightliner Cascadia (last 8 of Vin: CSBV9904)-Cummins ISX 400 (serial number 79548320)-Eaton Fuller UltraShift (FM-14E310B-LAS) EeeeZzz, …Apr 10, 2019 · I was also slightly rushed for work, so did not have time to tear into anything. Also, there is no MIL on the dash, which tells me it OK to drive. From what I understand, CAB codes are temperamental. Any insight would help. Thanks::Fault::-CAB 33-SPN 520403-Fail 31::Truck Info::-2012 Freightliner Cascadia (last 8 of Vin: CSBV9904) This diagnostic code is typically Regulatory Fault Ignored - Derate On. Note: (EPA10 ONLY) If SPN 5246/FMI 0, 15 or 16 are the only fault(s) present, follow troubleshooting procedure for SPN 3361/FMI 7 (DEF Unit - Unable to clear Restriction). The 3361/FMI 7 code, is more then likely your metering unit is stopped up and needs flushed.THIS IS ONE POSSIBILITY ON CLEARING CODES SNP 3361/ SNP 5246 / SNP 4364 ON FREIGHTLINER CASCADIA , THIS CLEAR CODES ON MY TRUCKhttps://youtu.be/t1yuZtAirlwSPN 1548 FMI 5 Freightliner. We have talked about the SPN side of this fault code, and you will need to know what the FMI side of the code is referring to. The SPN fault code is for the HVAC Duct System and that system, as you know is more electrical. It handles the cooling and heating of the air in your cab or sleeper.Follow these guidelines to check for fault codes on any Freightliner Cascaida with a DD15 engine. Key on, Engine off. Placed unit in neutral. Locate the square black button on the odometer screen. Using the black button cycle through the options displayed on the odometer reading until it reads “diagnose”. Hold the button until the display ...Technical Service Bulletins (TSB) for 2018 Freightliner Cascadia. Search. Your OBD-II Trouble Codes Repair Site. Home; Trouble Codes; FAQs; Forums; Store; Search; ... Summary: SS 1033257 P4 New Cascadia ABS Fault Code 11/520247/31 --Failure Memory Bit (ESC) Condition Exists . Communication Number: DOC-1033275, …Aug 1, 2012 · Communication Number: SB41-013, Date: 2020-03-17. Category: 100000 POWER TRAIN. Summary: Freightliner Service Bulletin for Midship Bearing Replacement for built vehicles with driveshafts SPL140, SPL170 or SPL250 with first order driveline vibration. Communication Number: SF576, Date: 2020-03-17. 2011 Freightliner Cascadia fault code spn 2631 fmi 1 followed the diag tree on this one several times code keeps returning smoke control is at 1.0000 when pulling. Unit has 449,000 miles on it pulled venturi and hot pipe to EGR cooler very sooted up my question is would a egr cooler keep making this code return. ….

Some common airbag fault codes include code numbers 12, 13, 14, 21, 22 and 23. Airbag fault code number 12 refers to the battery voltage being low. Code number 13 informs the drive...Roy. That fault is for your blower motor. 25. 523318. 07. Blower motor protection mode (speed mismatch or. blocked rotor). Either a faulty motor itself or the blower wheel is not able to turn freely. Check for a faulty wheel or a potential mouse nest.If you are involved in an accident deemed to be your fault, the full coverage portion of your auto insurance policy should pay to repair your vehicle. If the accident is deemed to ...This diagnostic code is typically Regulatory Fault Ignored - Derate On. Note: (EPA10 ONLY) If SPN 5246/FMI 0, 15 or 16 are the only fault(s) present, follow troubleshooting procedure for SPN 3361/FMI 7 (DEF Unit - Unable to clear Restriction). The 3361/FMI 7 code, is more then likely your metering unit is stopped up and needs flushed.Everything hangs on figuring out what went wrong. After a SpaceX Falcon 9 rocket came apart on a flight to re-supply the International Space Station, the company’s technical staff ...Today we check it out the diagnostics menu on the 2019 Cascadia. I tried to explain a little about it, if you have any questions feel free to ask down below ...6922 Wake-up Hardware Fault–Modules are kept awake 7 6923 Wiper Parked Input Fault 7 6924 Multifunction Turn Signal Switch Disagreement–Wiper on/off input is off and wiper high GPS location data, fault codes, and other technical data may be recorded. This data may help provide a better understanding of the circumstances of a crash. Personal data such as name, gender, and age are not recorded. However, other parties such as law enforcement, could combine the data logger’s con- I have freightliner cascadia 2019 with codes spn 3238 fmi 2 and spn 520365 fmi 5 and spn 5741 fmi 13, replaced new outlet nox still showing codes ... i have a 2017 freightliner cascadia that has fault codes SPN-5397, SPN-520371, SPN-520372 & SPN-523001 ...I have a engine code sfu 49 520201 fail 03 what do this mean I have a 2013 dd15, 2013 freightliner Cascadia dd15, it jus - Answered by a verified Technician ... we are having an eng 1 fault code on our 2013 freightliner both check engine lights are on one red one blinking and the amber one, not sure what the deal is. Freightliner cascadia fault codes, 5. Clear codes and cycle ignition OFF. 6. Turn the ignition ON (key ON, engine OFF). 7. Does the code return? a. Yes; replace the AP, clear codes and verify repair. Refer to Original Equipment Manufacturer's (OEM) literature. b. No; Go to step 8. 8. Gently wiggle pedal and harness connector to simulate road vibration. 2 SPN 2623/FMI 2 - GHG14, I have fault code 545 58 spn 523318 fail 6 on my dashboard. My sleeper a/c controls don't work AT ALL. ... codes my 2012 freightliner cascadia is giving me fault 1 cab 33 spn 522108 fail 05 fault 2 chs 71 spn 520919 fail 05 fault 03 eec 61 spn 4364 fail 18 fault 04 eec 61 spn 3364 fail 02 fault 05 sys 58 s ..., I have fault code 545 58 spn 523318 fail 6 on my dashboard. My sleeper a/c controls don't work AT ALL. However, my front can a/c is working fine. 2015 freightliner cascadia DD15. What is this code and … read more, If you do not know how to reset fault codes on Freightliner Cascadia, here’s what you can do: 1. Turn off the battery switch for 15 minutes. 2. While waiting, check the oil level, coolant level, and the check engine lights. 3. After that, turn the knob back to the on position but do not start the truck immediately. 4., Table 1. Table 2. This fault code sets when the Integrated Predictive Powertrain Control (IPPC) module detects that the voltage on pin 1 is too high. All information subject to change without notice. Connect DiagnosticLink ®. Turn the ignition ON (key ON, engine OFF). Check for the high voltage code in other modules. Is code SPN 168/FMI 0 ..., Feb 23, 2020 ... Comments104 ; Freightliner Detroit Check Engine Codes. Double D Distribution · 111K views ; Prime Inc. Makes Public Announcement To 9442 Truck ..., Freightliner cascadia 2016 fault code spn 520359 fmi 4 ambient … read more. TomcM28. Owner. Associates. 20 satisfied customers. 2018 freightliner. 2028 Freightliner 3*******5418. Checked. After turning on, truck runs for a couple of minutes. Flashes full board of check engine lights with EEC code … read more., Feb 16, 2021 · M-F. Weekend 2-3 pm CST for the day. That code is for your heater blower motor. 523318. 07. Blower motor protection mode (speed mismatch or. blocked rotor). Either a faulty motor itself or the blower wheel is not able to turn freely. Check for a faulty wheel. , Jan 19, 2019 · I have a 2016 freightliner cascadia that has codes Spn 22 (563) FMI 14 SID 55 FMI5 SID 19 FMI 2 … read more. MasterTech Mike. Lead Diagnostic Technician. Academic Honors Diploma. 1 satisfied customers. SPN-807 6 Dif 2 - ASR Valve Brakes System Controller. SPN-807 6 Dif 2 - ASR Valve Brakes System Controller … read more. , CASCADIA MAINTENANCE MANUAL Models: CA113DC CA113SLP CA125DC CA125SLP STI-478-6 (02/03/2022) Published by Daimler Truck North America LLC 4747 N. Channel Ave. Portland, OR 97217 , I got this cascadia at my shop i got this CAN fault 524033 which is for lost communication with cab i m having trouble - Answered by a verified Technician ... Hey there, I have a Freightliner Cascadia with a code SPN 677 FMI 5. I don't need wiring diagrams, I don't need the detroit code identification., Drivers are paying more--$300 on average--for car insurance after getting into auto accidents, even when they aren’t at fault. By clicking "TRY IT", I agree to receive newsletters ..., This diagnostic code is typically Regulatory Fault Ignored - Derate On. Note: (EPA10 ONLY) If SPN 5246/FMI 0, 15 or 16 are the only fault(s) present, follow troubleshooting procedure for SPN 3361/FMI 7 (DEF Unit - Unable to clear Restriction). The 3361/FMI 7 code, is more then likely your metering unit is stopped up and needs flushed., GHG14 ACM2.1 Fault Codes SPN FMI ACM2.1 FAULT CODE DESCRIPTION GHG14 5488 5 SCR Line Heater #5 Circuit Failed Open 520232 9 NOX Mass Signal Not Available via CAN 520323 3 High Side Digital Output Supply Voltage Circuit Failed High 520323 4 High Side Digital Output UV_DOS Circuit Failed Low 520326 3 Under pressurized DEF …, OBDII Freightliner Code Definitions. Be sure to double check the codes. Anything P1000 to P1999 or P3000 to P3400 will be Manufacturer specific and may not match the ones …, b. No; update the ACM using the latest server information. Perform the repair verification. If the fault returns, Go to step 4. 4. Check for other emission-related fault codes. Are there any Selective Catalyst Reduction (SCR) or Diesel Particulate Filter (DPF) related fault codes present? a. Yes; diagnose and repair the emission-related fault ... , If your batteries were extremely low, this could also explain this fault code. I would however recommend having all of them tested and making sure all of your cables and connections are clean while making good contact. I hope you find this information helpful. ... 2017 freightliner cascadia 122sd. Engine codes: spn973, fmi 9, and spn2011, fmi 9, Don't forget to Subscribe! - https://goo.gl/XtV9CJCheck out our Merch! - https://thedieseler.myteespring.co/Support these videos on Patreon! - https://www.pa..., 4. Does the fault code go inactive when a component is disconnected? a. Yes; Go to step 5. b. No; Go to step 6. 5. For the component in question, inspect the harness connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins and signs of moisture in the connector or wire damage near the connector. Are any signs of ..., SPN 1548 FMI 5 Freightliner. We have talked about the SPN side of this fault code, and you will need to know what the FMI side of the code is referring to. The SPN fault code is for the HVAC Duct System and that system, as you know is more electrical. It handles the cooling and heating of the air in your cab or sleeper., I got this cascadia at my shop i got this CAN fault 524033 which is for lost communication with cab i m having trouble - Answered by a verified Technician ... Hey there, I have a Freightliner Cascadia with a code SPN 677 FMI 5. I don't need wiring diagrams, I don't need the detroit code identification., Here is the testing and troubleshooting procedure for this fault code: The Motor Control Module (MCM) monitors the rail pressure and when rail pressure deviation is greater than 200 bar for eight seconds, the MCM sets the code. ... 2017 freightliner cascadia 122sd. Engine codes: spn973, fmi 9, and spn2011, fmi 9. ..., Parameter Codes (PID) 51 - 63. 51 Position of the throttle pedal - THROTTLE POS - Throttle Pos 52 Intercooler Temperature - INTERCLR TEMP - Intercool TEMP , 3. Check for multiple fault codes. Are there any aftertreatment system fault codes present? a. Yes; diagnose the other fault codes. b. No; Go to step 4. 4. Check the Aftertreatment Control Module (ACM) software level. Is the ACM software level lower than 7.56.7.0? a. Yes; update the ACM software to the latest available on the server. b. No; Go ..., Line Heater 2 Open Circuit. Show/Hide Checkboxes. Check for multiple codes. If SPN 4355/FMI 5 and SPN 4354/FMI 5 are present, repair open between pin 9 of the ACM 120-pin connector and pin 2 of line heaters 2 and 1. If only SPN 4355/FMI 5 is present, Go to step 2. Disconnect line heater 2. Turn the ignition ON (key ON, engine OFF)., Oct 13, 2019 · ebay store: https://www.ebay.com/str/dieseltruckrepairwebsite: https://dieseltruckrepairllc.com/I’ll show you how to read fault codes on your Freightliner tr... , Here I show you what code SPN 4354 FMI 5 can be! AFT 1 SCR Catalyst Reagent LineHeater 1Current below Normal or Open Circuit. Here we found the cable was cut..., Replace the oil pressure sensors all the pressure switches. Replace the oil pressure sensors all the pressure switches went down except for one I have an eec 0.61 spin 32 5102 pressure DPF still on the … read more. 2915 Freightliner cascadia dd13 code SPN3719. FMI 0 TRUCK. 2915 Freightliner cascadia dd13 code SPN3719., b. No; update the ACM using the latest server information. Perform the repair verification. If the fault returns, Go to step 4. 4. Check for other emission-related fault codes. Are …, 6922 Wake-up Hardware Fault–Modules are kept awake 7 6923 Wiper Parked Input Fault 7 6924 Multifunction Turn Signal Switch Disagreement–Wiper on/off input is off and wiper high, That fault is not showing up in the fault list. Are you for sure is spn 2567. yes. that's the only code showing. I found a spn 2567 fault for the truck side. It should not effect hp tho. Its a ecessive amount of broadcast annonce messages on the 1939 circuit. This should not effect the loss of power tho., The ECU 128 code in Freightliners is similar to the check engine light. It is not a fault code on its own, however, it indicates that there is a problem with the engine which can easily be diagnosed with a scanner. To understand what the ECU 128 code means, it is important to know what it is the ECU does. Known as the engine computer or brain ..., The Spn 3238 Fmi 2 problem code is about Nox Out Sensor Not Ready After Dewpoint Enable Check: Aftertreatment 1 Exhaust Dew Point Data Erratic, Intermittent Or Incorrect. The last 5 words are from the FDMI portion of the code. To learn more about this code and what to do to fix it, just continue to read our article.