Doc inlet temp during regen

My unit starts the regen but the DOC inlet temp is only getting to 420 degrees and is not allowing to burn off for the regen. I’m getting codes 4752, (intake manifold pressure sensor) 3719, 3711. Will the intake manifold pressure sensor not allowe the regen to get the DOC inlet up to the proper 520 degrees in order to fully perform the regen ...

Symptoms of a clogged DPF filter are excessive regens and long regens, last ing 60 minutes or longer. You can monitor temperatures/pressures when doing a forced regen to make sure everything is in range and working properly. Faulty …Abstract. Gas Power Plants in supply consumer electricity needs often experience fluctuating operating load changes. In addition, the compressor inlet temperature which is the initial air temperature entering the compressor has an influence on the gas turbine system because it can affect the thermodynamic processes of compression, heat addition and expansion.(10-25-2018, 09:04 PM) oscar0627 Wrote: (10-25-2018, 07:49 PM) reddan Wrote: Hi! I have DD15 GHG14 and when i start the regen in a couple mintes Exhaust Manifold is over heating (RED).Posts: 28. Joined: Jul 2016. CM871 High DOC temp during regen. Hi everyone, I have regen issue with my 2009 Volvo with CM871. During Regen instead of DOC temp staying steady and DFP temps going up, this engine shows DPF outlet temp staying steady while DPF intake and DOC temps keep going up (1000+). I have this truck for 3 years and every ...Mack MP8 regen issues. 2012 CXU613 with 2012 fault codes so it's not a 2013. Truck arrived at the shop at the beginning of the week. Soot load was level 5. performed a parked regen. DOC inlet temp was bias. DPF outlet temp stayed above inlet temp during regen.

Example : SCR Outlet temp (587°C) 1090°F minus SCR Inlet Temp (398°C) 749°F = (116°C) ... (2.32 psi) and dropped to 5kPa (0.72 psi) during a full regen. 13. Is the DOC inlet pressure starting above the pressure specified below and stays high? 2 Symptom Diagnostics: Noisy 1- Box Aftertreatment 6 All information subject to change without notice.Jan 18, 2020 · Mack MP8 regen issues. 2012 CXU613 with 2012 fault codes so it's not a 2013. Truck arrived at the shop at the beginning of the week. Soot load was level 5. performed a parked regen. DOC inlet temp was bias. DPF outlet temp stayed above inlet temp during regen. If regen is starting in the software (i mean it showing that regen is started and rpm goes up) and your doc inlet temp is not raising more than 380-480 then dosing will not start. Dosing starts after the doc inlet being heated up to 560+. This initial heating depends from turbocharger and intake throttle valve.To create the thermal conditions necessary for soot regeneration in the CSF, fuel was injected into the exhaust pipe up-stream of the DOC (Fig.2). In this study the conditions for fuel injection were fixed to 25ml/min, 300°C inlet temperature and 49,000/hr space velocity for the DOC to generate a CSF inlet temperature of 600C.13. Inspect the DOC inlet pressure sensor electrical connector for corrosion and spread pins. a. If corrosion or damaged (or bent) pins are found, repair as necessary. Verify repairs. b. If no corrosion or damage is found, replace the DOC inlet pressure sensor. Refer to section "Removal of the GHG14 Diesel Oxidation Catalyst Inlet Temperature ...The step response of DOC- out temperature can be acquired by injecting constant amount (i.e. 50 mg/s) of Diesel fuel into the exhaust pipe upstream of the DOC during different steady states (i.e. constant inlet temperature and mass flow rate of exhaust gas).DPF inlet temperature: 550°C; Soot load: 4.1 g/dm3. It should be noted that there was almost no NO2 generation over the DOC during active regeneration. This ...

Face plugging is an extreme buildup of carbon on the inlet side of your DOC (Diesel Oxidation Catalyst). This extreme buildup causes additional exhaust backpressure and restricts exhaust flow, which hinders the performance of the DPF and SCR downstream. While the face plugging can be caused by a few different mechanical problems, the most ...13) Monitor DOC inlet temperature. It MUST be greater than 400°C (750°F). If it is not above 400°C (750°F), block off part of the radiator with cardboard. Be careful that coolant temperatures do not go high enough to cause a Check Engine light. 14) Continue to monitor the DOC inlet temperature to make sure it is greater than 400°C (750°F).Start looking at it, doc temps run up to 700 degrees within the first 5 minutes but I never see any pressure kick up from the Hydrocarbon doser. By 10 minute mark all temperatures holding steady around the 400-500 mark. Checked intake/exhaust leaks, intake throttle valve, egr valve, ensure all items are were they should be during the regen process. 11. After the low temp ATD regeneration has run for 20 minutes, monitor the DOC outlet temperature sensor reading. Is the DOC outlet temperature sensor reading within 25°C (45°F) of the DOC inlet temperature sensor? a. Yes; replace the HC doser block. Refer to section "Removal of the Hydrocarbon Doser Block ". Verify repair. b.The catalyst should also exhibit low light-off temperature, to enable active regeneration during periods of operation with lower engine load. Figure 4 illustrates the light-off performance with post injection of fuel and exhaust injection of fuel for a fresh and aged DOC. The x-axis represents the inlet temperature of the DOC. Inspect the intake pressure/temperature sensor and wiring connector for signs of damaged, bent, spread, corroded or ... During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. 3. Start the engine; using DiagnosticLink start the NOx Sensor ...

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2015年2月2日 ... I replaced the DOC inlet and outlet temp sensors along with the DPF outlet sensor and all are reading within 3 degrees of each other when the ...The DOC (diesel oxidation catalyst) is the first filter that creates the heat ... This is where the inlet temperature sensor is located. *Want to know more ...Posts: 28. Joined: Jul 2016. CM871 High DOC temp during regen. Hi everyone, I have regen issue with my 2009 Volvo with CM871. During Regen instead of DOC temp staying steady and DFP temps going up, this engine shows DPF outlet temp staying steady while DPF intake and DOC temps keep going up (1000+). I have this truck for 3 years and every ...WARNING!!: ⚠️⚠️⚠️Always use the proper tools and safety equipment to perform this job. Failure to perform the job correctly can result in personal injury or ...

The AFI wont kick in tell the DOC and DPF inlet temps reach 500+*f and the DOC temp must stabilize. Whats the turbo command %, turbo speed, boost pressure, EBP, and engine load during a regen? CAT Factory Trained & Cert. Heavy Equip+Truck Systems.Malfunctioning temperature sensors. The temperature sensors, spread through the aftertreatment system, measure the exhaust going into and out of each filter. The first sensor is in the DOC and the last is after the SCR. The sensor’s readings measure how well the system is working, and a faulty sensor can interfere with the regen process. 9. Wait for 10 minutes, then monitor the Diesel Oxidation Catalyst (DOC) inlet temperature and DOC outlet temperature. Are the readings within 14°C (25°F) of each other? 9.a Yes; stop the low temp regen and Go to step 10. 9.b No; replace the DOC inlet temperature sensor. Refer to section "Removal of the Diesel Oxidation Catalyst Inlet13) Monitor DOC inlet temperature. It MUST be greater than 400°C (750°F). If it is not above 400°C (750°F), block off part of the radiator with cardboard. Be careful that coolant temperatures do not go high enough to cause a Check Engine ight.l 14) Continue to monitor the DOC inlet temperature to make sure it is greater than 400°C (750°F). Control of Diesel Oxidation Catalyst (DOC) outlet temperature is critical for the downstream Diesel Particulate Filter (DPF) regeneration. However, the disturbances, …Engine Speed 1100 rpm (1275 rpm during first 12 minutes of regen then 1100 rpm for fuelmap ending in ZGS 999) Turbo Speed 45,000 – 60,000 (turbo is used to create pressure in the DD13 and DD15AT only) Fuel Cut Off Valve 100% (once DOC inlet temp reaches 536° F) Engine Torque Around 5% Actual Torque Load 15 – 18% (greater than 20% may ...During a proper regen, DOC inlet temp, or temp #1, should be about 550-600. DOC outlet temp, or temp #2, should be 1000-1200 degrees. DPF outlet temp should be 950 to 1200. In a healthy system, the engine injects fuel into the exhaust during a regen that the DOC burns to create the heat. The heat is used to BAKE down the collected soot …Mack MP8 regen issues. 2012 CXU613 with 2012 fault codes so it's not a 2013. Truck arrived at the shop at the beginning of the week. Soot load was level 5. performed a parked regen. DOC inlet temp was bias. DPF outlet temp stayed above inlet temp during regen.

In active DPF systems, HCs are introduced into the exhaust gas (via engine post-injection or exhaust injection) and oxidized over the DOC in order to increase the DPF inlet temperature. This functionality is typically combined with NO 2 generation for passive DPF regeneration.

During a stationary (parked) regeneration, these are the typical values for a healthy system. EGR Differential Pressure - Less than 12.7 mm-Hg [0.5 in-Hg] ... Using onsite I can get the engine to start the regen cycle but doc intake temp will not get above 500F.Mar 7, 2017 · Volvo D13 regeneration. we have couple of trucks on our fleet with the same problem. The forced regen would start but runs indefinetly and not continuously. T he exhaust temp rises to about 500, dpf inlet and outlet reaches up to 920 and then engine suddenly changes tone, shuts of the aftertreatment injector, dpf inlet and outlet temps drop for ... a. If the DOC inlet pressure starts out above 10 kPa (1.45 psi) and decreases during a parked regen, this indicates that the DPFs were plugged and the parked regen has cleared them. Go to step 8. b. If the DOC inlet pressure starts above the pressure specified below and stays high, the DOC is considered plugged. Go to step 9. Table 1. Emissions ... Start looking at it, doc temps run up to 700 degrees within the first 5 minutes but I never see any pressure kick up from the Hydrocarbon doser. By 10 minute mark all temperatures holding steady around the 400-500 mark. Checked intake/exhaust leaks, intake throttle valve, egr valve, ensure all items are were they should be during the regen process. a Diesel Oxidation Catalyst (DOC). Together, those products are effective at removing 99 percent of PM soot from the exhaust system using wall-flow substrates. As soot accumulates in the filter, a regeneration event will provide sufficient heat to oxidize the captured soot. The remaining ash is removed during regularly scheduled cleaningEngine in smoke control mode. Monitor smoke control status during regen. Smoke control status should be 0. DOC Inlet Temperature Sensor non-responsive. Monitor ...An icon is displayed on the InfoCenter; however, no action is required by the operator, and the machine may be operated as normal during this cycle. 3. Reset regeneration uses a combination of the intake throttle and post fuel injection to further raise the exhaust temperature to burn off the particulate matter. The High Exhaust Gas Temperature ...Tractor was towed in with engine warnings on, and in shutdown mode.Active faults for soot level high, and failed regen. due to temp. Inlet DOC temp only at 425, wont go high enough to start dosing fuel.During a proper regen, DOC inlet temp, or temp #1, should be about 550-600. DOC outlet temp, or temp #2, should be 1000-1200 degrees. DPF outlet temp should be 950 to 1200. In a healthy system, the engine injects fuel into the exhaust during a regen that the DOC burns to create the heat. The heat is used to BAKE down the collected soot in the DPF.• Exhaust temperature drops between turbo and DOC/DPF Inlet. • Engine load is ... Enter Menu In The Digital Display Regen - REQUEST DIESEL PARTICUALTE FILTER ...

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The ignition temperature of a diesel oxidation catalyst (DOC) and the internal temperature-field distribution of the diesel particulate filter (DPF) during active regeneration are investigated during an engine bench test in this study. Based on the dropped to idle (DTI) test, a test method is developed to determine the safe regeneration temperature of the DPF. The results show that when the ...Passive regeneration typically occurs when the temperature of the aftertreatment DPF is above 3160C [601 OF]. This occurs during highway driving or driving with heavy loads. Since passive regeneration occurs naturally, it is considered to be normal engine operation. No fuel is added to the exhaust stream during passive regeneration.My unit starts the regen but the DOC inlet temp is only getting to 420 degrees and is not allowing to burn off for the regen. I'm getting codes 4752, (intake manifold pressure sensor) 3719, 3711. ... i have code 3719 for high soot level …I began to run NED constantly while driving at work so I can monitor how the engine and regen process look like. Regens usually start at around 60% soot load, the percentage after regeneration goes down into low teens or low single single digits. From what I was able to observe, DOC usually gets somewhere in between 1050° and 1250°To create the thermal conditions necessary for soot regeneration in the CSF, fuel was injected into the exhaust pipe up-stream of the DOC (Fig.2). In this study the conditions for fuel injection were fixed to 25ml/min, 300°C inlet temperature and 49,000/hr space velocity for the DOC to generate a CSF inlet temperature of 600C.DPF Temperature Sensor Module – A three-probe sensor where one probe tracks temperature levels at the DOC inlet, another monitors temperature at the DPF inlet, ...Performance Check -Low Temperature ATD". Are the inlet NOx sensor and outlet NOx sensor readings within 50 Parts Per Million (PPM) of each other? a. Yes; Go to step 22. b. No; replace the inlet NOx sensor. Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". Go to step 22. 22. Reconnect the DEF dosing unit ...(11-12-2017, 04:56 AM) trs100 Wrote: (11-12-2017, 02:40 AM) am2000am Wrote: (11-11-2017, 08:49 PM) trs100 Wrote: Hi, Trying to perform parked regeneration on Cascadia with DD15, but when it reach temperature to turn the after treatment injector ON it stays off. All parameters look good only Fuel Doser Injection Status is 0. After treatment injector and …Tue 11/28. 90° /76°. 65%. Times of clouds and sun with a couple of showers. RealFeel® 98°. RealFeel Shade™ 95°. Max UV Index 5 Moderate. Wind ENE 2 mph. ….

Here's the "normal" values for all of the Aftertreatment Parameters during a Parked Regen. *Note* On a DD13, there are 3 important parameters that will have higher values than the DD15 or DD16. -Turbo Speed 38,000-42,000 rpm. -SCR Inlet NOx Sensor 400-500 ppm. -Actual DEF Dosing Quantity 900-1100 g/h.100% load, SCR inlet temperature sensor less than 650°C (1200°F), ambient temperature greater than 0°C (32°F), coolant temperature greater than 70°C (158°F), non-regeneration conditions present Monitor Sequence None Execution Frequency Continuous when enabling conditions met Typical Duration 30 Minutes Dash Lamps MIL Engine Reaction ...Jun 22, 2022 · The ignition temperature of a diesel oxidation catalyst (DOC) and the internal temperature-field distribution of the diesel particulate filter (DPF) during active regeneration are investigated during an engine bench test in this study. Based on the dropped to idle (DTI) test, a test method is developed to determine the safe regeneration temperature of the DPF. The results show that when the ... Jan 11, 2020 · Force regen after having dpf filters cleaned and temps are as follows After treatment DPF outlet 1024 After treating DPF intake 1041 After treatment diesel oxidation catalyst temp 640 Is this normal 30min I to regen for catalyst to be so low? Any info appreciated Reply Dcmechanical Location Offline Senior Member Reputation: 396 Thanks Given: 952 During a proper regen, DOC inlet temp, or temp #1, should be about 550-600. DOC outlet temp, or temp #2, should be 1000-1200 degrees. DPF outlet temp should be 950 to 1200. In a healthy system, the engine injects fuel into the exhaust during a regen that the DOC burns to create the heat. The heat is used to BAKE down the collected soot …intake manifold pressure: 6.0-6.5 inhg percent load: 0 turbo actuator position commanded: 96% turbo actuator position: 96% dpf soot load: normal coolant temperature: 209f doc inlet: 432f dpf inlet: 421f dpf outlet: 411fYou are correct the inlet should be higher then the outlet, in the above post I just stated in backwards. During the regen mine were reversed, (inlet low, ... My DPF inlet temp will reach 1250, outlet temp ... JMBT. 08-03-2016, My DOC inlet never goes over about 650oF and usually stays in the low 6's. Quick serve says 550-750 is ...2023年8月11日 ... As a whole, the DOC inlet temperature in most working conditions is between 450 °C and 500 °C, which satisfies the set target value. In region 1 ... Doc inlet temp during regen, Throttle Valve Actual NOT USED DURING A PARKED REGEN Fuel Comp Pressure 85 ... DOC Inlet Temp 700 – 950 ° F DOC Outlet Temp 1050 – 1150° F DPF Inlet Pressure 0.5 psi – 1.0 psi DPF Outlet Pressure 0.01 psi to 0.9 psi Doser Injection Status gradual increase from 5% to 45% • DOC inlet temp must be at 525° F or higher to, During a proper regen, DOC inlet temp, or temp #1, should be about 550-600. DOC outlet temp, or temp #2, should be 1000-1200 degrees. DPF outlet temp should be 950 to 1200. In a healthy system, the engine injects fuel into the exhaust during a regen that the DOC burns to create the heat. The heat is used to BAKE down the collected soot in the DPF., Monitor temperature rise across DOC during regen. Little or no temperature rise indicates DOC not active. Monitor DOC inlet temperature. No temperature change after ... Pressure Sensor 85 Sensor Supply 86 Turbo Compressor In Temp 87 Intake Manifold Pressure Sensor 88 Sensor Ground 89 DOC Inlet Temp Sensor 90 Intake Air Throttle Valve …, During vehicle operation, active regeneration is performed when the accumulated soot and ash reach boundary limits. In this operation, the particulate soot is ..., Still not temp. Have fault traced with G/D. Replaced egr valve. checked diff sensor,tubes,vgt lever,boost leaks,fuel pressure to A/T fuel doser and made sure it wasn't plugged. During regen the exh temps are (inlet 739) (after cat 969-978) (outlet 877-904) It goes back to idle and soot level reads the same and only code active is for soot level., 11. After the low temp ATD regeneration has run for 20 minutes, monitor the DOC outlet temperature sensor reading. Is the DOC outlet temperature sensor reading within 25°C (45°F) of the DOC inlet temperature sensor? a. Yes; replace the HC doser block. Refer to section "Removal of the Hydrocarbon Doser Block ". Verify repair. b. , An increased pressure drop was also recorded across the DOC during active regeneration (ΔP C), which could be attributed to fouling of the catalyst inlet face by soot and/or coke species. No increased DOC pressure drop was seen during filter loading. Figure 16. Pressure drop and temperature during active regeneration (600°C) , If everything is checking out, then yes, the vanes are not adjusting properly. On just idling, the truck should be at a 160 degree engine temp and the exhaust should be around 520. As it gets warmer, the exhaust will get warmer. 180 degree truck should have a 600 degree exhaust at idle for this engine and the regen should start activating, the ..., 1688 posts · Joined 2013. #1 · Feb 14, 2014. I was having a discussion with someone and I told him that when I do a parked regen on our Cummins equipt buses the exhaust temp at the manifold gets up to 1350 degrees. He called bull shit, even though I am watching it on a computer screen through Cummins Insite, and he said the Duramax only …, During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. 11. Perform High Idle Regeneration. 12. When regeneration is complete, clear all fault codes. 13. Road test the vehicle. a. If no fault codes appear, testing is complete. Verify ..., 7. Perform a parked regeneration; during the regeneration, monitor (ASL: DOC Inlet Pressure). 8. During the parked regeneration, does either the DOC inlet pressure sensor drop to 0.0 psi at any time? a. Yes; replace the failed sensor. b. No; clear fault and release unit. The code likely occurred after extended idle and soot buildup has cleared ..., After it stopped my truck requested another park regen. If you’re needing that many regens, you may need a new filter or perhaps a sensor. You should go see your truck manufacturer. I should add that 200° is normal temp for your dash to show. Mine goes up to about 225° before the fan kicks in and brings it back down to 200°., During a parked regen on a DD15, the SCR Inlet NOx sensor should be around 200-300ppm. DD13 SCR Inlet NOx sensor is slightly higher around 400-500ppm. The SCR Outlet NOx should be somewhere in the neighborhood of 5-25ppm for all DD Platforms. The other true method in testing the NOx sensors is to perform a regular parked regen, then perform ..., Thank you for input again, however, i forgot to mention at the very beginning that turbo speed at 58,000 - 60,000 rpm which mean in the boost rate, but DOC and DPF at 350, 400 and 430 degree after 30 minute of regen, but after i detect CAC leak on both side, i replaced CAC and turbo speed back to normal around 42,000-43,000 rpm., During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. ... Refer to section "Removal of the Intake Pressure/Temperature Sensor". Verify repairs. 11. Visually inspect exhaust system for leaks or damage, including manifold, gaskets ..., If the DOC inlet pressure starts out high above 10 kPa (1.45 psi) and decreases during the parked regen., this indicates the DPFs were plugged and the parked regen cleared them. If the DOC inlet pressure starts above 6 kPa (GHG14, 0.8 psi), and stays high, the DOC is considered plugged., During a stationary (parked) regeneration, these are the typical values for a healthy system. EGR Differential Pressure - Less than 12.7 mm-Hg [0.5 in-Hg] ... Using onsite I can get the engine to start the regen cycle but doc intake temp will not get above 500F., The AFI wont kick in tell the DOC and DPF inlet temps reach 500+*f and the DOC temp must stabilize. Whats the turbo command %, turbo speed, boost pressure, …, A) A forced regen will take approximately 40 minutes. It will cycle through 6 stages during this 40 minute period. If the Regen cycle takes longer than this, something else is still wrong. b) During a forced regen cycle, The DOC will get to about 550F, and the doser will activate, first, usually in short intervals, then come on solid., COOLANT TEMPERATURE: 209F DOC INLET: 432F DPF INLET: 421F DPF OUTLET: 411F Last edited: Jun 10, 2017. 4vmach1, Jun 10, 2017. 4vmach1, Jun 10, 2017 #71 + Quote Reply. Trucking Jobs in 30 seconds. ... During one of the parked regen the delta-p set a out of range on the data monitoring, but hasn't done it since then. ..., 6. Stay relaxed in a pair of jeans and a windbreaker. Grab your favorite pair of jeans, which will keep your outfit comfortably casual. Slide on a breathable top, along with a windbreaker. Pick out a colorful windbreaker for a more dynamic look, or play around with neutral tones if you'd prefer to be subtle., CM871 High DOC temp during regen - tariqzai - 04-12-2020. Hi everyone, I have regen issue with my 2009 Volvo with CM871. During Regen instead of DOC temp staying steady and DFP temps going up, this engine shows DPF outlet temp staying steady while DPF intake and DOC temps keep going up (1000+). I have this truck for 3 years and every forced ..., 2018 volvo vnrRequred regen on dash does not Go awaySent filters out for cleaningInatlled back same thisOn regen doc temp stays at 600, dpf inlet 800 and dpf outler 470Put new 7th injector and 7th injector is spraying at 75 psiDid regen 3 times temps not going up…perform filter reset from texh tool and adaptive reset….after regen 3 times same issue still asking for regen, During vehicle operation, active regeneration is performed when the accumulated soot and ash reach boundary limits. In this operation, the particulate soot is ..., 6. Stay relaxed in a pair of jeans and a windbreaker. Grab your favorite pair of jeans, which will keep your outfit comfortably casual. Slide on a breathable top, along with a windbreaker. Pick out a colorful windbreaker for a more dynamic look, or play around with neutral tones if you'd prefer to be subtle., DOC inlet 500-600F. DPF inlet starts to increase once regen starts. DPF outlet will increase after DPF inlet starts building temp and heat transfers through DPF. DPF outlet may peak slightly above inlet temp but should down below the inlet temp., Still not temp. Have fault traced with G/D. Replaced egr valve. checked diff sensor,tubes,vgt lever,boost leaks,fuel pressure to A/T fuel doser and made sure it wasn't plugged. During regen the exh temps are (inlet 739) (after cat 969-978) (outlet 877-904) It goes back to idle and soot level reads the same and only code active is for soot level., Mar 15, 2017 · DPF regeneration temperature rising strategy chiefly considers two temperatures including DOC inlet temperature and the DPF inlet temperature. Temperature rising approaches is based on Great Wall 4D83 diesel engine whose performance parameters are listed in Table 1 and DPF experiment system is shown in Fig. 8. Secondary post injection (Post ... , After cleaning the doc it was reinstalled on the truck, reset doc/dpf counters. Performed manual stationary regen, the truck kicks up to 1200-1300 to start regen, the turbo speed starts at around 42k and turbo actuator 92%, egr valve position consistently stays at 0%, exhaust gas pressure about 140, intake manifold pressure about 12.5., 1 12-12-2015, 07:37 AM. cm871 low DOC temp won't reg to clear last code. Prostar ISX CM871 low DOC temp won't regen to clear last code. New turbo. New DOC. Cleaned DPF. Remove EGR and cleaned, no exhaust leaks. Engine temp 200 drg. Fan cycles., Mar 18, 2018 · Tractor was towed in with engine warnings on, and in shutdown mode.Active faults for soot level high, and failed regen. due to temp. Inlet DOC temp only at 425, wont go high enough to start dosing fuel. Intake throttle valve is working. Will continue on diag tomorrow. Any thoughts? Thanks. , Soot load was level 5. performed a parked regen. DOC inlet temp was bias. DPF outlet temp ... Mack MP8 regen issues. IROC Location Offline Posting Freak Reputation: 336. Thanks Given: 279 Thanks Received: 2918 (1049 Posts) Posts: 2,131 Threads: 155 Joined: Jul 2011 1 01-18-2020, 01:06 AM ., 1 12-12-2015, 07:37 AM. cm871 low DOC temp won't reg to clear last code. Prostar ISX CM871 low DOC temp won't regen to clear last code. New turbo. New DOC. Cleaned DPF. Remove EGR and cleaned, no exhaust leaks. Engine temp 200 drg. Fan cycles.