Doc inlet temp during regen

Ask the driver if a parked REGEN was attempted and what was the result? 4. ... If black smoke is not seen during Step 2, proceed to Step 3. 3. Perform Onboard Filter Cleanliness Test (OBFCT) ... the test is running and can be replayed later for review. - Observe exhaust gas temperatures from DOC Outlet Temp, DOC Inlet Temp and DPF Outlet Temp.

Monitor temperature rise across DOC during regen. Little<br /> or no temperature rise indicates DOC not active.<br /> Monitor DOC inlet temperature. No temperature change<br /> after engine startup indicates sensor problem.<br /> Listen for the ITV to sweep at key up.<br /> Turbo not functioning properly Perform a turbo …Apr 10, 2018 · 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. erite filter substrate, the filter peak temperature during regen - eration usually should be controlled under 1,100 °C to avoid filter melts, and the maximum temperature gradient usuallyJan 23, 2018 · What are the temps showing when you are running the regen? Presuming you are using DDDL? You should see the dpf inlet, the catalyst, the outlet. You want the inlet to show 400, the filter inlet at 450 and above, and the outlet at 450 and above for when the doser will open up and start heating the catalyst up more. Obtain a Regeneration log file and monitor the DOC inlet and DPF outlet pressures. Refer to section "Performing a Parked Regeneration - GHG17". Does the DOC inlet pressure ever go to zero during the regeneration? a. Yes; replace the DOC Inlet Pressure sensor. For 1-Box™, Refer to section "Removal of the Diesel Oxidation Catalyst Inlet ...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. ... Vehicle fails to regen. During High idle regen, DOC outlet max 479 F , Command boost pressure 0%, fuel doser inject ...

Apr 7, 2013 · 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. a. 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. Go to step 10. b. If the DOC inlet pressure starts above 6 kPa (0.8psi), and stays high, the DOC is considered plugged. Go to step 11. 3 09-15 All information subject ...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 ...2015年8月6日 ... EGT2 is post DOC, and EGT1 is pre DOC. Normal driving, EGT3 will ... intake air temp during a regen. I don't think fuel is added into the ...Apr 10, 2018 · 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. Oct 27, 2017 · 10. Perform a parked regeneration. 11. Once the parked regeneration is completed, review the DOC inlet pressure sensor reading in the log file. Does the DOC inlet pressure reading ever read zero during the parked regeneration?1. Yes; replace the DOC inlet pressure sensor. Refer to section "Removal of the Diesel Oxidation Catalyst Inlet Pressure ... SFN 10-42R ZTSE6031 Restrictor Plate Tool (on vehicle DOC cleaning tool for MaxxForce 7 engines) IK0700030 Determining a DPF's "health" on a used truck IK0700032 DPF Snap Accel Test (Quick Test) IK0700035 DPF replacement- critical steps to perform after replacing or cleaning a DPF WIL2800030 DOC Damage as a Result of Improper Cleaning

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.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).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 inlet temperature of the DOC is more than 240 C, the DOC begins ignition and reaches theerite filter substrate, the filter peak temperature during regen - eration usually should be controlled under 1,100 °C to avoid filter melts, and the maximum temperature gradient usuallyFault code 3719-0 doc in 450 doc out 480 dpf out 460ish I conforemed the exhaust flaper is closing when a regen is ... Intake Manifold Pressure/Temperature Sensor Turbo Inlet Pressure/Temperature Sensor Turbo Outlet Temp Sensor (MBE 900 only) Turbo inlet elbow Air inlet piping ... Have it installed but still not building heat during regen.

Nicholas martinez.

Save. ClickClick5 · #9 · Aug 7, 2015. EGT3 is the one you will want to watch for the regen. This is the post DPF temp probe. EGT2 is post DOC, and EGT1 is pre DOC. Normal driving, EGT3 will reach around 500-800F. You will know …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.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 forced regen i …2013年2月12日 ... Monitor temperature rise across DOC during regen. Little<br />. or no ... Disconnect DOC Inlet Temperature Sensor and inspect connector for ...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.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.

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 ...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 regen i did was successful and most of the time DPF differential pressure would be zero after the regen.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 ...Vocational, Technical or Tra... 5,816 satisfied customers. I have detriot DD 15 freightliner 2013. I changed the DEF. I have detriot DD 15 freightliner 2013. I changed the DEF Pump and leveling valve. Now running parked forced regen, SCR Inlet Temp is …Exhaust Gas Temperature 1 – DOC Inlet (℉) 07E02281F9; C462058136F9; 4010; 000900050020; EG1; 4.22 Required; Usage Notes. If this XGauge reads 32 °F try …Monitor smoke control status during regen. Smoke control status should be 0. DOC Inlet Temperature Sensor non-responsive Monitor DOC inlet temperature. No temperature change after engine startup indicates sensor problem. Intake Throttle Valve not functioning properly Listen for the ITV to sweep at key up. Turbo not functioning properly Perform ...Since these high temperatures generally fo not occur during normal engine operation, a number of strategies are used to actively increase the exhaust temperature [4]. Active regeneration systems may include the use of a diesel burner to directly heat the exhaust entering the DPF or the use of a diesel oxidation catalyst (DOC) to oxidize diesel ...6. Start the engine and perform a Parked Regen. 7. Let the regen run for 22 minutes then monitor the DOC inlet pressure. Is the DOC inlet pressure reading at or above 8 kPa (1.16 psi)? a. Yes; the DOC is face plugged. Use the DOC air cleaning tool PN: DSN0ATZ16002. Refer to section "Diesel Oxidation Catalyst Air Cleaning". Verify repair. b. No ...ASL: DOC Inlet Temperature ASL: DOC Outlet Temperature ASL: ASL: SCR Outlet Temperature ASL: SCR Inlet NOX Sensor After-treatment Outlet NOX ASL: Nox conversion AAS: Fuel Doser In'ection Status ASL: Exgas mass rate 'd Connections (paused} Device LMCM21J MCM21T MCM21T CPC04T MCM21T MCM21T MCM21T ACM21T ACM21T ACM21T ACM21T ACM21T MCM21T ACM21TCM871 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 forced regen i did was successful ...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.The regen temps, at least to me, look good for a 2007 emission engine. How does the dpf diff. psi look during the regen? Was the 7th inj. cleaned and if so did you …

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°.

Oct 17, 2020 · Regen started. DOC inlet go to 750 and both others are around 750 as well. But diagnostic link never shows that regen goes into regeneration state it always shows engine in thermal management.that is why 7th injector never opens. If i manually open 7th injector,it opens and temp rise as well. But it never opens during regen, no other codes 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, ...Cummins ISX, ESN 79461593. DOC temp not getting above 410F during forced regen. DPF in and out teml hold at 408F. EGR closed, turbo actuator 80% closed, EGR diff pressure 0.015inHg, exhaust pressure 1 … read more2021年1月30日 ... 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 - Answered by a ...There is always something . Excessive idling does cause the DPF to need a regen more often. The Pete I was in, it was recommended that if we had to idle due to temps, that we raise the idle to 1500 to help keep the DPF hot enough to regen itself. However, with the other issues you said it has, sounds like it needs to see Mr. Peterbilt.a. 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. Go to step 10. b. If the DOC inlet pressure starts above 6 kPa (0.8psi), and stays high, the DOC is considered plugged. Go to step 11. 3 09-15 All information subject ...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.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.I have been working on this bus on and off for several months. It is trying to actively regen around every 2 hours. ISL9. CM2250. engine serial# *****. ECM code CB90010.41. Here are the specs I've gotten while a driving regen is going. DOC Intake Temp - 946.1 f. DPF Intake Temp - 1081.6 f.

Ncaa basketball espn schedule.

Performance mgt.

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 ...Monitor temperature rise across DOC during regen. Little<br /> or no temperature rise indicates DOC not active.<br /> Monitor DOC inlet temperature. No temperature change<br /> after engine startup indicates sensor problem.<br /> Listen for the ITV to sweep at key up.<br /> Turbo not functioning properly Perform a turbo …Vocational, Technical or Tra... 5,816 satisfied customers. I have detriot DD 15 freightliner 2013. I changed the DEF. I have detriot DD 15 freightliner 2013. I changed the DEF Pump and leveling valve. Now running parked forced regen, SCR Inlet Temp is …The addition of engine exhaust to intake air increases the over- all heat capacity of the charge, leading to a reduction of peak combustion temperature. Since ...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.2013年2月12日 ... Monitor temperature rise across DOC during regen. Little<br />. or no ... Disconnect DOC Inlet Temperature Sensor and inspect connector for ...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.The inlet temperature was 200°C and the detector temperature was 220°C. Nitrogen was used as the carrier gas. There was a flow rate of 2 mL/min, no split injection, and an injection volume of 1 μL. The column was a DB-WAX-etr polar column (30.0 m×0.53 mm×1.00 μm).The temperature was kept constant as was the pressure at 4.40 psi.The furnace temperature heating program included: first held ... ….

DOC not active. Monitor temperature rise across DOC during regen. Little or no temperature rise indicates DOC not active. DOC Inlet Temperature Sensor non-responsive. Monitor DOC inlet temperature. No temperature change after engine startup indicates sensor problem. Intake Throttle Valve not functioning properly. Listen for the ITV to sweep at ...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 ...Exhaust Gas Temperature 1 – DOC Inlet (Degrees Fahrenheit). Description. Gauge; TXD ... Time since Active Regen (Hours) · DEF Level (%) · DEF Temperature (°F) ...DOC temp looks good but the DPF temp is too low. ... Dd15 does not go past 370 degrees during regen , ... It is in regen zone 2. I started regen. Regen started. DOC inlet go to 750 and both others are around 750 as …Regen started. DOC inlet go to 750 and both others are around 750 as well. But diagnostic link never shows that regen goes into regeneration state it always shows engine in thermal management.that is why 7th injector never opens. If i manually open 7th injector,it opens and temp rise as well. But it never opens during regen, no other codesTue 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.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. …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. Doc inlet temp during regen, Fengjun Yan. Control of diesel oxidation catalyst (DOC) outlet temperature is critical for downstream diesel particulate filter regeneration, but is challenging to control due to the non-minimum ..., Stationary Regeneration Test that is performed using JPRO® or OEM Service Tool once either or both of the. components are exposed to coolant. During regeneration, the coolant evaporate out of both components due to the high temperatures that are attained, and thus the components return to normal operating specications., How to Reduce DPF Regens. Stiction is the sticky friction caused by byproducts of burnt oil. High pressure builds heat in tight-tolerance applications and extreme heat causes the oil to burn, oxidize and create layers of sludge and deposits. Fuel injectors, pistons, rings, and a variety of other engine components are continually susceptible to ..., OUT 1112 DPF OUT 1121 TROTTLE AT 76 DOC INLET PRESSURE .95 DPF OUT PRESS .30 FUEL DOSER 16.8 SRC INLET TEMP 1015 SRC OUT TEMP 994 THIS WITH DEF HOOKED UP CONVERSION ... Also, if its showing vehicle speed at any point during the regen(I have seen this before even though it was parked), it will kick it out or …, Since these high temperatures generally fo not occur during normal engine operation, a number of strategies are used to actively increase the exhaust temperature [4]. Active regeneration systems may include the use of a diesel burner to directly heat the exhaust entering the DPF or the use of a diesel oxidation catalyst (DOC) to oxidize diesel ..., , 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 ..., Throttle Valve Actual NOT USED DURING A PARKED REGEN Fuel Comp Pressure 85 - 92 psi ... 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, 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 ight.l 14) Continue to monitor the DOC inlet temperature to make sure it is greater than 400°C (750°F). , Save. ClickClick5 · #9 · Aug 7, 2015. EGT3 is the one you will want to watch for the regen. This is the post DPF temp probe. EGT2 is post DOC, and EGT1 is pre DOC. Normal driving, EGT3 will reach around 500-800F. You will know …, A typical mid-efficiency boiler or water heater operated with water temperatures in the range of 130° to 140° will prevent condensate problems. Note: A water heater must use a thermostatic mixing valve to provide lower-temperature domestic water in order to prevent a risk of scald injury. This has proven to provide reliable temperatures ..., Apr 7, 2013 · 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. , Jan 11, 2020 · Typically, outlet temp should stay around 50F below inlet temp. If DPF outlet temp stays above the inlet temp then the DOC isn't working probably. Likely face plugged and allows a rich fuel mixture to burn inside DPF instead of DOC. DPF temp should be in the 1000-1100F range. If DPF temp reaches around 1300F, regen will shut down to prevent damage. , SUBJECT: Modified Parked Regeneration Concerns ISSUE The call center has received a number of calls regarding concerns about the modified parked ... modified parked regeneration utilizes increased DOC inlet temperature to clean the DOC inlet face. Excessive torque loads can cause parked regenerations to abort. In some cases the . 19 TS-6 - 4 -, Monitor temperature rise across DOC during regen. Little or no temperature ... 4 SPN 3242/FMI 2 This diagnostic condition is typically DOC Inlet Temperature ..., Hi Mike. No fault codes, regen starts both fuel pressure s around 60 psi and temperature at doc raise normal above 600° the fuel dosing starts and dpf temperatures inlet and outlet raise until 750- to … read more, 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., Since these high temperatures generally fo not occur during normal engine operation, a number of strategies are used to actively increase the exhaust temperature [4]. Active regeneration systems may include the use of a diesel burner to directly heat the exhaust entering the DPF or the use of a diesel oxidation catalyst (DOC) to oxidize diesel ..., Soot load was level 5. performed a parked regen. DOC inlet temp was bias. ... Mack MP8 regen issues. IROC Location Offline Posting Freak Reputation: 337. Thanks Given: 280 Thanks Received: 2922 (1051 Posts) Posts: 2,135 Threads: 155 Joined: Jul 2011 1 01-18-2020, 01:06 AM ., 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., Perform the low temperature ATD regen; Refer to section "EPA10 Perform Performance Check - Low Temperature ATD". Go to step 6. 6. 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 other exhaust temperature sensor ..., 8. Use DiagnosticLink to start a low temperature regeneration. 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., 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., Right away I noticed that the DOC inlet temperature reading was at 662 F (default max value as I found out) @ 1.7V, yet the outlet temperature was 419 F @ 1V . These thermo-couples run on 5V and generally have a much larger spread between temperature/voltage correlation. Now it was time to let the data talk., Also, is the DOC and DPF due for cleaning? It sounds like you have access to Insite. When running a regen you need to open up data monitor and watch all the exhaust temps and doser injector state. Once a regen is initiated the DOC inlet and DPF inlet need to reach about 525 -550 degrees., Oct 17, 2020 · Regen started. DOC inlet go to 750 and both others are around 750 as well. But diagnostic link never shows that regen goes into regeneration state it always shows engine in thermal management.that is why 7th injector never opens. If i manually open 7th injector,it opens and temp rise as well. But it never opens during regen, no other codes , EGT stands for Exhaust Gas Temperature. The EGT sensor is responsible for reading the temperatures of the aftertreatment system components such as inlet DOC, ..., Monitor smoke control status during regen. Smoke control status should be 0. DOC Inlet Temperature Sensor non-responsive Monitor DOC inlet temperature. No temperature change after engine startup indicates sensor problem. Intake Throttle Valve not functioning properly Listen for the ITV to sweep at key up. Turbo not functioning properly Perform ... , 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 ., 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., Stationary Regeneration Test that is performed using JPRO® or OEM Service Tool once either or both of the. components are exposed to coolant. During regeneration, the coolant evaporate out of both components due to the high temperatures that are attained, and thus the components return to normal operating specications., During an active regen, engine exhaust temp is slightly higher than normal but not significantly. Maybe 50 to 100 deg. F at best. The high temps are in the exhaust NOX/DPF filter. Everything upstream of that is pretty much normal from my observations. See this video on an entire active regeneration., Right away I noticed that the DOC inlet temperature reading was at 662 F (default max value as I found out) @ 1.7V, yet the outlet temperature was 419 F @ 1V . These thermo-couples run on 5V and generally have a much larger spread between temperature/voltage correlation. Now it was time to let the data talk.