Spn 4364 fmi 1. Jan 4, 2020 · The very first thing is to check for any charge air...

1 4 08-14 SUBJECT DATE SPN 3251/FMI 0, 1, and 16 April 2014 Additions

Nov 24, 2019 · Spn 3364 fmi 2 Spn 5246 fmi 16 Fmi 5246 fmi 15 Spn 4364 fmi 18 A few weeks ago i changed the output NOX. The check light stayed off for the most part but came back. Would stay on for about a minite then go away. Or i could stop and do a regen on it and code would dissapear. Last weekend i changed out the DEF filter figuring maybe this was the ... To use the table below, first write down the SPN and FMI codes you received from the engine diagnostic gauge. Locate each SPN in the first column and its associated definition to the right in the second column. In the same way, locate the FMI in the forth column and its associated definition to the right in the fifth column. SPN Code. SPN Name : FMI Code. …Fault codes that display on your dash are going to be the usual. These are common fault codes that signal a failed 1-Box and an expensive quote for replacement. Fault Codes (EPA10 & GHG14) 2011-2016. EEC61 SPN 4364 FMI 1 – Selective Catalyst Reduction Nox Conversion Very Low.Detroit Diesel EPA 2010 and newer engines will often have active and inactive codes for the DEF system. There are a variety of Detroit DEF and SCR tests that exists, which we want to make you aware of. The following is a shortlist of possible codes that you could see: SPN 3361 FMI 0. SPN 3361 FMI 1. SPN 3361 FMI 3. SPN 3361 FMI 4. SPN 3361 FMI 5.2015 f750 6.7 Cummins has a son 4364. Fmi 31 an a spn 5246 fmi 18 replace def injector clear codes drive 3 days an it - Answered by a verified Technician. We use cookies to give you the best possible experience on our website.FMI SPN FMI DESCRIPTION QSB QSC QSL9 QSM1 1 QSX1 5 QSK19 QSK23 QS T 30 QSK45 QSK60 QSK78 HHP Level Number (**) 151 (Red) P110 0 110 0 Engine Coolant Temperature High – Critical X 151 (White) P110 0 110 0 Engine Coolant Temperature High – Critical X 1 153 (Yellow) P105 3 105 3 Intake Manifold Temperature Sensor #1 Circuit - shorted high X 2 ...0:00 / 10:11. Intro. Cascadia DD15 and DD13 fault code SPN 4364 FMI 18. SCR NOx efficiency low. Pedro Fuentes. 18K subscribers. Subscribe. 56K views 3 years ago CARLOS' DIESEL ELECTRIC. Typical...1 06 01-18 SUBJECT DATE SPN 520371 (ACM) (GHG17) June 2018 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0200 GHG17 DD8 SPN 520371/FMI 16 - GHG17 Updates to the DD8 that also transfer to the DD5. DDC-SVC-MAN-0193 GHG17 DD5 SPN 520371/FMI 16 - GHG17 Mar 21, 2023 · 2011-2014 Freightliner Cascadia with NOx efficiency fault codes and DEF quality low fault codes. This is a common problem most trucks with One Box will come ... Selective Catalyst Reduction NOx Conversion Very low 4361/1 & 4364/18. 10 Replies. One of the most common fault codes occurring in EPA10/GHG14 model units. This fault code appears when the ACM reads that NOx conversion is lower then spec. Based off the SCR inlet & outlet NOx sensors.Independent occurrences of SPN 1761 FMI 1 fiDEFTL Inducement 3‐5fl with no other DEFTL faults present can be caused by the introduction of air bubbles into the DEF tank stand pipe. If SPN 1761 FMI 1 is present without any other DEFTL fault codes present, follow the repair procedure below. REPAIR PROCEDURE SPN 4374 (ACM) (GHG17) January 2016 Additions, Revisions, or Updates DDC-SVC-MAN-0084Publication Number / Title GHG14 DDPlatform Section Title Change Platform SPN 4374/FMI 0 - GHG14 Update procedures. SPN 4364/FMI 18 - GHG14 DDC-SVC-MAN-0191 GHG17 DD Platform SPN 4374/FMI 0 - GHG17 Implement GHG14 changes in GHG17 manual. SPN 4364/FMI 18 ... Fault is SPN 4364 FMI 18 - Aftertreatment SCR Catalyst Conversion Efficiency - Data Valid but Below Normal Operating Range - Moderately Severe Level. I …Mack Truck Models: CHU, CXU, GU, TD. Date: 10/2012. MID 223 Gear Selector Control Unit, Fault Codes. Mack Truck Models: CHU, CXU, GU, TD. Date: 10/2012. Mack Engine - 2007 Emissions Standard Fault Code Manual. Date: 01/2009. The check engine light illuminates in your dash of your Mack Truck.The Spn 4364 Fmi 18 Paccar is a device that helps to regulate the air/fuel mixture in your engine. It does this by monitoring the exhaust gas temperature and …Sep 19, 2021 · Second Opinion] 2016 Freightliner Cascadia dd15 Detroit engine. I have a fault code on. It is txld: 61 SPN: 3556 Aftertreatment 1 hydrocarbon Doser 1 FMI 18 (low-moderate severity) count 1 Can you hel … read more 1 8 08-14 SUBJECT DATE SPN 4364 (ACM) (EPA10) August 2014 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0084 DD Platform SPN 4364/FMI 1 - EPA10 The diagnostic procedure has been updated. SPN 4364/FMI 18 - EPA10 8 08-14 All information subject to change without notice. 32019 Freightliner Cascadia DD15Initial diagnostic and troubleshooting of intermittent fault code SPN 4364 FMI 17 "Nox Sensor Valid but out of normal range."N...SPN 4364/FMI 18. SPN 4364/FMI 18. Description. This code sets when the Aftertreatment Control Module (ACM) detects that the Selective Catalyst Reduction (SCR) NOx Conversion efficiency is low. Monitored Parameter. SCR inlet NOx sensor and SCR outlet NOx sensor. Typical Enabling Conditions. SPN 5246 FMI 15 Volvo D13. This is what the Volvo Data sheet has to say about this code: ECM SPN 5246, Aftertreatment SCR Operator Inducement Severity – MID. 128 PSID 46. Data valid but above normal operating range - Least severe level. Moderate SCR system fault detected – Warning fault- Moderate engine derate.Since the FMI 1 code is tied to the SPN 4364 code, you know it is referring to your NOx system. In this case, this code means: “This fault code sets when the Aftertreatment Control Module (ACM) detects that the NOx conversion is lower than a calibrated threshold” In this case, there are over 20 steps to take to clear the code.1 05 18-16 SUBJECT DATE SPN 5443 (ACM)(GHG17) and SPN 520372 (ACM)(GHG17) May 2016 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0191 DD SPN 5443/FMI 0 - GHG17 Added ACM 7.56.6.0 software check SPN 5443/FMI 15 - GHG17 SPN 5443/FMI 16 - GHG17 SPN 520372/FMI 16 - GHG17520.2 spn 5246/fmi 15 - epa10 Regulatory Fault Ignored - Derate On For 2011 models, this code sets when the vehicle has been driven for 30 miles while a code is present for the DEF tank level, DEF metering valve, DEF pump, NOx sensors, Blocked DEF line, DEF quality, NOx efficiency, SCR harness and/or SCR sensor.With a cummins 6.7 I have the SPN: 4364 / FMI 31 coming up. I have 2 check engine lights. The codes coming up on the diagnostics says DTC 04364-31/ Aftertreatment 1 SCR Conversion Efficiency FMI: Condition Exists – nonstandard failure mode. Answered in 5 minutes by: Technician: Nich1019. Ask Your Own Medium and Heavy Trucks Question.0:00 / 10:11. Intro. Cascadia DD15 and DD13 fault code SPN 4364 FMI 18. SCR NOx efficiency low. Pedro Fuentes. 18K subscribers. Subscribe. 56K views 3 years ago CARLOS' DIESEL ELECTRIC. Typical...2 SPN 4364/FMI 18 - GHG14 SCR NOx Conversion Efficiency Low Table 1. SPN 4364/FMI 18 Description This code sets when the Aftertreatment Control Module (ACM) detects that the Selective Catalyst Reduction (SCR) NOx Conversion efficiency is low. Monitored Parameter SCR inlet NOx sensor and SCR outlet NOx sensorSPN 4364 FMI 18 DTC Explained, Troubleshooting. Vehicles SPN 4334 FMI [2-18] Troubleshooting Explained. Vehicles SPN 3264 FMI [0-16] Troubleshooting Explained. SPN 629 is a diagnostic trouble code for Controller #1 Bad Intelligent. Usually a voltage anomaly. FMI 12 – Device Or Component ...SPN: Description: Possible FMI: 2071: Missing Chassis Module CAN Message: 9: 6890: CHM No PWM DRLs Fault: 8: 6897: Fuel Water Separator Heater Output Fault: 6: 6898: Brake Air Dryer Output Fault: 6: ... 1 FAULT CODE FMI DESCRIPTION FIRST DETECTED LAST OBSERVED TYPE SPN-21 4 Engine ECU Temperature (use …Spn578. SPN numbers mean very little as they are not actual code numbers. ... 85: 0. it Mar 12, 2017 · SPN 3364 FMI 18; SPN 4364 FMI 1 CAT Adapter 3 CAT ... 102 fmi 16 Spn 102 fmi 16 Spn 597 fmi 2 Spn 3242. regards Kenworth & Peterbilt .... Mar 14, 2021 — kenworth spn 578 fmi 3. All that matters is the actual codes when we hook up to it.Title: SPN-5246 FMI-16, SPN-5246 FMI-15, SPN-4364 FMI-18,... - DTNA Solutions Author: CORZARN Created Date: 4/28/2021 11:52:07 AM1 2 23-14 SUBJECT DATE MCM SPN 2791/FMI 2 - GHG14 February 2014 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0084 GHG14 DD Platform SPN 2791/FMI 2 - GHG14 Updated section to include two TS Letters, new graphic, adjusted format for yes/no responses, and four new steps. 2 23-14 FMI codes associated with SPN 4364 include: FMI 18: NOx conversion efficiency low – The SCR system is not effectively reducing NOx emissions, which could be caused by a variety of issues, such as low DEF quality, a malfunctioning DEF injector, or a damaged SCR catalyst. FMI 1: NOx sensor issue – The NOx sensor may be providing incorrect or ...Hello I have a MX13 paccar engine that is loosing power and I have a constant code SPN-1209 Engine Exhaust bank 1 and a SPN-1072 engine compression brake 1 ... Getting this code spn 731 fmi 16, I got this truck from. Hello im. Getting this code spn 731 fmi 16, I got this truck from a costumer that got it from another person.I got this code SPN 4364 FMI 31 , I guess Doser module. So, how many more miles can I drive and can I replace it myself. Cummings engine. Ikamob01, Jul 25, 2023.FMI SPN FMI DESCRIPTION QSB QSC QSL9 QSM1 1 QSX1 5 QSK19 QSK23 QS T 30 QSK45 QSK60 QSK78 HHP Level Number (**) 151 (Red) P110 0 110 0 Engine Coolant Temperature High – Critical X 151 (White) P110 0 110 0 Engine Coolant Temperature High – Critical X 1 153 (Yellow) P105 3 105 3 Intake Manifold Temperature Sensor #1View My Bookmarks 1 0 Title: A26 SPN: 4364 FMI: 18 Supplemental Diagnostics Applies To: All A26 engines CHANGE LOG Please refer to the change log text box below for recent changes to this article: 02/17/2020 - Calibration released to NavKal - Updated step 1 to reflect this change 02/03/2020 - Updated diag steps with calibration release infoWhat is the SPN 4364 FMI 18 Code? The SPN 4364 FMI 18 code is a diagnostic trouble code that indicates a problem with the NOx sensor circuit. This sensor is part of the SCR system, which is responsible for reducing harmful emissions from diesel engines.The NOx sensor measures the level of nitrogen oxides in the exhaust gas and …SPN 4364/FMI 1. Description. This fault code sets when the Aftertreatment Control Module (ACM) detects that the NOx conversion is lower than a calibrated ...1 01 01-18 SUBJECT DATE SPN 4364 (ACM)(EPA10); SPN 4364 (ACM)(GHG14) January 2018 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0084 DD Platform SPN 4364/FMI 18 - EPA10 Diagnostics have been updated. SPN 4364/FMI 18 - GHG14112-13 spn 4364-fmi 18 - ghg14. View This TSB. TSB Number: 111-13 NHTSA Number: 10140872 TSB Date: January 11, 2013 Date Added to File: June 11, 2018 Failing Component: Engine And Engine Cooling:Exhaust System Summary: 111-13 spn 4374/fmi 0, 1, 3, 4 - ghg14. View This TSB. TSB Number: 110-13 NHTSA Number: 101408711 8 08-14 SUBJECT DATE SPN 4364 (ACM) (EPA10) August 2014 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0084 DD Platform SPN 4364/FMI 1 - EPA10 The diagnostic procedure has been updated. SPN 4364/FMI 18 - EPA10 8 08-14 All information subject to change without notice. 3Jun 16, 2022 · SPN-4364 18 Aftertreatment 1 SCR Conversion Efficiency Jan 30, 5:07 PM Jan 30, 5:09 PM Intermittent SPN-3226 2 Aftertreatment 1 Outlet NOx 1 Jan 14, 9:12 AM Jan 30, 6:59 PM Constant SPN-3226 2 Aftertr … Jun 5, 2020 · 2012 Freightliner cascadiaFault codesSam cab codes 524071 fmi 31 521704 fmi 3 521705 fmi3 521702 fmi 3 521708 fmi 3Def codes Spn 3361 fmi 5 Spn 3364 fmi 17 and fmi 1 and fmi 2 Spn 3936 fmi 18 Spn 4364 … read more 2 SPN 3364/FMI 18 – GHG14 This diagnostic is typically Improper Diesel Exhaust Fluid (DEF) Quality Warning. NOTE: Retain a log file if Detroit™ Customer Assistance is required. 1. Connect DDDL/DDRS 7.08 SP2 or newer. a. If there are fault codes present other than SPN 3364/FMI 2, SPN 5246/FMI (any) or SPN 4364/FMI 1 or 18,What is the SPN 4364 FMI 18 Code? Symptoms of SPN 4364 FMI 18 Code. How to Diagnose SPN 4364 FMI 18 Code. Step 1: Check for Fault Codes. Step 2: …Nich1019. Diesel Technician. Vocational, Technical or Tra... 158 satisfied customers. Fault code spn 3216 fmi 5 Spn 3226 fmi 12 Spn 5246 fmi 16. Fault code spn 3216 fmi 5 Spn 3226 fmi 12 Spn 5246 fmi 16 Spn 5298 fmi 18 Son 3226 fmi 13 Spn 5394 fmi 5I cleared the codes and following came … read more.May 26, 2020 · Mack Truck Models: CHU, CXU, GU, TD. Date: 10/2012. MID 223 Gear Selector Control Unit, Fault Codes. Mack Truck Models: CHU, CXU, GU, TD. Date: 10/2012. Mack Engine - 2007 Emissions Standard Fault Code Manual. Date: 01/2009. The check engine light illuminates in your dash of your Mack Truck. 2012 Freightliner cascadiaFault codesSam cab codes 524071 fmi 31 521704 fmi 3 521705 fmi3 521702 fmi 3 521708 fmi 3Def codes Spn 3361 fmi 5 Spn 3364 fmi 17 and fmi 1 and fmi 2 Spn 3936 fmi 18 Spn 4364 … read more2015 f750 6.7 Cummins has a son 4364. Fmi 31 an a spn 5246 fmi 18 replace def injector clear codes drive 3 days an it - Answered by a verified Technician. We use cookies to give you the best possible experience on our website.1. Connect DiagnosticLink ®. 2. Check for multiple fault codes. Are any of the following faults active: SPN 4363/FMI 3 or 4, SPN 3246/FMI 3, 4, or 21? a. Yes; Refer to section "SPN 3246/FMI 15 - GHG17" for diagnostics. b. No; Go to step 3. 3. Visually inspect the exhaust system from the turbocharger outlet to the aftertreatment inlet.Detroit DD13 EPA10 (2010-13) Fault Code: SPN 4364 FMI 1 (ACM) Selective Catalyst Reduction NOx Conversion Very Low. DESCRIPTION: Selective Catalyst …Hello everyone. I'm currently working on a cascadia with a dd13 that have 2 scr effciency codes(SPN 4364 FMI 1 SPN 4364 FMI 18).FMI SPN FMI DESCRIPTION QSB QSC QSL9 QSM1 1 QSX1 5 QSK19 QSK23 QS T 30 QSK45 QSK60 QSK78 HHP Level Number (**) 151 (Red) P110 0 110 0 Engine Coolant Temperature High – Critical X 151 (White) P110 0 110 0 Engine Coolant Temperature High – Critical X 1 153 (Yellow) P105 3 105 3 Intake Manifold Temperature Sensor #1FMI 18. FMI 31. Code Description: Aftertreatment SCR Catalyst Conversion Efficiency data valid but below normal operating range - moderately severe level. Best …2012 Freightliner cascadiaFault codesSam cab codes 524071 fmi 31 521704 fmi 3 521705 fmi3 521702 fmi 3 521708 fmi 3Def codes Spn 3361 fmi 5 Spn 3364 fmi 17 and fmi 1 and fmi 2 Spn 3936 fmi 18 Spn 4364 … read morehaving issues with 2015 cascadia dd15 engine regen issues vin 3AKJGLD57FSGB4103 these are the fault codes, 4364 fmi 1, 4364 fmi 18, ... I have a 2013 Freightliner vin 1fujghdv0dsfa0570.Codes spn 3361 fmi 7 Spn 4335 fmi 14Also codes 5246 fmi 15 and 5246 fmi 16.Truck had red been derated to 5 mph.What can I do to fix this …Table 1. SPN 4364/FMI 1. SPN 4364/FMI 1. Description. This fault code sets when the Aftertreatment Control Module (ACM) detects that the NOx conversion is lower than a calibrated threshold. Monitored Parameter. Selective Catalyst Reduction (SCR) Inlet NOx sensor, SCR outlet NOx sensor. Typical Enabling Conditions. View My Bookmarks 1 0 Title: A26 SPN: 4364 FMI: 18 Supplemental Diagnostics Applies To: All A26 engines CHANGE LOG Please refer to the change log text box below for recent changes to this article: 02/17/2020 - Calibration released to NavKal - Updated step 1 to reflect this change 02/03/2020 - Updated diag steps with calibration release infoApr 19, 2022 · I have a 2016 freightliner cascadia. Issue(s): Stopped engine light popped up with the code SPN 4364, FMI 1. It's saying it's 25% derate but I can still drive the truck at regular speed. The Def light isn't on. A diagnostic I got said the soot level is low.I also have the code SPN 3251, FMI 0 code popping up as well. 1 4 08-14 SUBJECT DATE SPN 3251/FMI 0, 1, and 16 April 2014 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0084 DD Platform SPN 3251 FMI 0 - EPA07 The diagnostics have been corrected and are all new. SPN 3251 FMI 0 - EPA10 SPN 3251 FMI 0 - GHG14 SPN 3251 FMI 1 - EPA07 SPN 3251 FMI 1 - EPA10 ... SPN 3364/FMI 17. DescriptionImproper Diesel Exhaust Fluid (DEF) Quality. Monitored ParameterDEF Quality. Typical Enabling ConditionsDEF Refill event detected. Monitor SequenceNone. Execution FrequencyContinuous when enabling conditions met. Typical Duration2 hours. Dash LampsMIL, CEL. Engine Reaction25% Derate.Symptoms of SPN 4364 FMI 18 Code. How to Diagnose SPN 4364 FMI 18 Code. Step 1: Check for Fault Codes. Step 2: Inspect the NOx Sensor. Step 3: Check the Wiring Harness. Step 4: Check the SCR System. How to Fix Code SPN 4364 FMI 18. Solution 1: Replace the NOx Sensor. Solution 2: Repair the Wiring Harness.EEC61 SPN 4364 FMI 1 – Selective Catalyst Reduction Nox Conversion Very Low; EEC61 SPN 4364 FMI 18 – Selective Catalyst Reduction Nox Conversion LOW; Ask Your Own Medium and Heavy Trucks Question. Customer reply replied 2 years ago. 65311; How many fault codes have appeared recently? Do you know where it is broken?Thanks Received: 9 in 1 posts. Thanks Given: 8. Joined: Jul 2019. Reputation: 9. ZEZ: 91.42 ZEZ [Buy]. #1. Question 09-19-2019, 11:15 AM. Help1 04-22-2017, 01:11 AM. So ive been working on this issue with a volvo D13 and i have a code. spn 4094 fmi 1 - NOx limits exceeded due to insufficient reagent quality. went through the diagnostics provided through ptt twice and have not found an issue, however when i clear the code it comes back immediately and i also preformed a forced regen ...Jul 2, 2017 · Engine light came on today and got this code SPN 4364 FMI 31. Engine is a isx15 cm2350, 2017 t680 with 532,000 miles on it. "Aftertreatment 1 SCR Conversion Efficiency" Along with the code it has started blowing A LOT of extra exhuast during regens. With the extra exhuast during regens what's the likely problem? Mack Truck Models: CHU, CXU, GU, TD. Date: 10/2012. MID 223 Gear Selector Control Unit, Fault Codes. Mack Truck Models: CHU, CXU, GU, TD. Date: 10/2012. Mack Engine - 2007 Emissions Standard Fault Code Manual. Date: 01/2009. The check engine light illuminates in your dash of your Mack Truck.Cummins puts it on the valve cover. Do you have a Cummins engine? Roy. 4364 18. SPN 4364/FMI 18 Description This fault code sets when the Aftertreatment Control Module (ACM) detects that the NOx conversion is lower than a calibrated threshold Monitored Parameter Selective Catalyst Reduction (SCR) Inlet NOx sensor, SCR outlet NOx sensor Typical Enabling Conditions Diesel Exhaust Fluid (DEF ...• Internal structure failure of 1-Box™ NOTE: You may also refer to the video on DDCSN Support/Multimedia/EPA10/GHG14 Code SPN: 4364, FMI: 18 Troubleshooting for further information. Refer to https://ddcsn-ddc.freightliner.com/media/4364FMI18.mp4. (https://ddcsn-ddc.freightliner.com/media/4364FMI18.mp4 )Inactive fault codes 3364 fmi 2, 4364 fmi1, 4364 fmi 18, 3216 fmi - Answered by a verified Technician We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them.2 SPN 4364/FMI 18 – GHG14 This diagnostic is typically SCR NOx Conversion Efficiency Low. Table 1. SPN 4364/FMI 18 Description SCR NOx Conversion Efficiency Very Low Monitored Parameter SCR NOx Conversion Efficiency Typical Enabling Conditions DEF Dosing Valve On, 1000 - 1500 rpm, 15 - 100% load Monitor Sequence None Execution …Apr 17, 2021 · Aftertreatment 1 SCR Conversion Efficiency 4364 fmi 31 volvo 670. 2015. 610000. Changed pretty much all of the diesel - Answered by a verified Technician We use cookies to give you the best possible experience on our website. 18-Feb-2022 ... SPN 4364 FMI 1; SPN 4364 FMI 18; SPN 5246 FMI 0; SPN 5246 SPN 15; SPN 5246 SPN 16. No matter which code you have, the troubleshooting steps are .... SPN 4364/FMI 18. SPN 4364/FMI 18. DescriptDec 17, 2021 · Just threw code FMI 31, S 2 SPN 3364/FMI 1 - GHG14 Improper Diesel Exhaust Fluid Quality Final Warning Table 1. SPN 3364/FMI 1 Description Improper Diesel Exhaust Fluid (DEF) Quality Final Warning Monitored Parameter DEF Quality Typical Enabling Conditions DEF Refill event detected Monitor Sequence None Execution Frequency Continuous when enabling conditions met … 1 8 08-14 SUBJECT DATE SPN 4364 (ACM) (EPA10) August 20 SPN 4364 FMI 18 DTC Explained, Troubleshooting. Vehicles SPN 4334 FMI [2-18] Troubleshooting Explained. Vehicles SPN 3264 FMI [0-16] Troubleshooting Explained. SPN 629 is a diagnostic trouble code for Controller #1 Bad Intelligent. Usually a voltage anomaly. FMI 12 – Device Or Component ... Symptoms of SPN 4364 FMI 18 Code. How to Diagnose SPN ...

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