Doc inlet temp during regen

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.

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.During regen the temp doesn't get over 305. I thought it had to hit over 500 to kick on injector 7. ... We removed the DPF and DOC and got them baked and blew out. ... Constant regens. Two obd codes. Inlet trap pressure and particulate trap 1 ...Apr 15, 2018 · 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°. The stage1 is before regeneration phase. The DOC inlet temperature, the DPF inlet temperature, and the DPF outlet temperature are sequentially lowered due to the heat loss. The stage2 is during regeneration phase. The DOC inlet temperature slightly reduces due to the vaporization heat of methanol.Non-uniform fuel supply across the catalyst inlet face may also cause non-uniform and incomplete fuel oxidation over the DOC and lead to non-uniform DOC outlet temperature and durability challenges. In cases where …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).

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 ...PARAMETER, VALUE. Coolant Temperature, Above 140*F. DOC Inlet Temperature, 600-725*F. DOC Outlet Temperature, 1050-1150*F. DPF Outlet Temperature ...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 …Check the diesel particulate filter (DPF) assembly and check for any exhaust leaks, cracks, signs of melting or excessive deposits. Check the diesel oxidation catalyst (DOC) filter assembly and check for any exhaust leaks. Check the exhaust brake valve for full functionality. Check for any excessive ash accumulation in the DPF filter assembly.DOC face plugging, or DOC sulfur poisoning due to not using Ultra Low Sulfur Diesel (ULSD) fuel. Therefore, the AFI tip should be cleaned and the DOC inlet should be inspected before replacing the AFI. Follow the procedures in Guided Diagnostics to inspect and clean the DOC. Service Regeneration Once the soot level reaches 170%, the engine is ...Apr 7, 2013 · When the fan turns on the DOC temperature increases to almost 480F and as soon as the fan shuts off it goes back down to 440F. Obviously it's not reaching the 500F+ for the fuel to start dosing. No exhaust or boost leaks. Here are some of the data I wrote down during the parked regen: DPF DIFFERENTIAL PRESSURE: 0.1hg All of the temperatures pressure dosing quantity correct,the whole system removed from the truck and cleaned. Even a DEF tank flushed and refilled. It to the regen starts normally low PPM on the outlet 80% efficiency and then it slowly goes down to 0 and that's it,truck keep regen and it never stops. Any help would be appreciated thanks.

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 results showed that engine-out NOₓ emissions were positively correlated with vehicle specific power (VSP). The average NOₓ reductions (deNOₓ) of the SCR were 82.8%, 91.7%, and 85.5% for ...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 ...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 ...It's still in regen mode, but the current step says waiting on DPF outlet temp of 410°f, while the DOC inlet is over 470°f. The only codes are for the SCR efficiency, so if I could get it to complete the regen it should be fine.Engine in smoke control mode. Monitor smoke control status during regen. Smoke control status should be 0. DOC Inlet Temperature Sensor non-responsive. Monitor ...

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If your psi sensor is cleared and your temps still don’t come up, you’ll need to pull the DPF’s back out and Blow or out the DOC’s. Remove the 1-box inlet and rig a good vacuum cleaner to or all that soot will settle in front of the DOC and plug at least part of them again!Just an FYI there will be no HC dosing for the first 12 ish minutes of the regen. The doc inlet temp will raise around that 700-800 degrees mark in that first 12 min to burn Soot …DOC face plugging, or DOC sulfur poisoning due to not using Ultra Low Sulfur Diesel (ULSD) fuel. Therefore, the AFI tip should be cleaned and the DOC inlet should be inspected before replacing the AFI. Follow the procedures in Guided Diagnostics to inspect and clean the DOC. Service Regeneration Once the soot level reaches 170%, the engine is ...Once the DOC is heated up, it can produce high-efficiency oxidization of the post-injected fuel for the DPF regeneration. Based on the DOC light-off temperature achieved, the in-cylinder post fuel injection along with further modulation of the air system parameters can be used to reach a sufficiently high inlet gas temperature for the DPF ...

During regen the temp doesn't get over 305. I thought it had to hit over 500 to kick on injector 7. ... We removed the DPF and DOC and got them baked and blew out. ... Constant regens. Two obd codes. Inlet trap pressure and particulate trap 1 ...• Exhaust temperature drops between turbo and DOC/DPF Inlet. • Engine load is ... Enter Menu In The Digital Display Regen - REQUEST DIESEL PARTICUALTE FILTER ...What temp should doc inlet be during regen? Engine rpm should then become stable around 1275 rpm. 13) Monitor DOC inlet temperature. It MUST be greater than 400°C ...DOC inlet temperature; DPF inlet temperature; DPF outlet temperature; The MAXIMUM difference between the sensor readings should be 24 o C (43 o F). If the difference exceeds 24 o C (43 o F), replace the temperature sensor module assembly (the 3 temperature sensors are connected on the same CAN-BUS module and cannot be replaced separately, or …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 .High DOC outlet temperature for DPF regeneration during the FTP cycle CAT 3126 engine. As seen in the chart, maintaining constant DOC outlet temperature at variable exhaust gas mass flow rate and variable DOC inlet temperature conditions is not a trivial task.I have a 2017 Mack/CHU. With an engine light on. The codes that come up are P24D1, P24AF, P249F and P24AO. The first I'm pretty sure is for a … read more. Mike Mcmillan. Shop Foreman/Triage Tech. Associates. 7,331 satisfied customers. I have a 2018 CHU Mack MP8 engine showing me its @ 140% 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.[Server Time: 10/03/2022 09:26:18 pm] This Forum is English-Only!!!,... Donations help keep the lights on around here, Thanks in advance...The Weather Channel and weather.com provide a national and local weather forecast for cities, as well as weather radar, report and hurricane coverage

4. If present, check the condition of the insulation material around the exhaust pipe between the turbocharger and the ATD.. 5. Check the ATD mounting bands for tightness. If needed, tighten the mounting bands on horizon-tally and vertically mounted ATDs to 30 lbf·ft (41 N·m); on step-mounted ATDs, tighten the mount-ing bands to 15 lbf·ft (20 N·m).

The Aftertreatment System Technician's Guide … NUMBER:08 ATS REF.:Listed in Table :ATSDATE:February 2008 SUBJECT: ADDITIONAL ENGINE WAS ADDEDPUBLICATION: DDC-SVC-MAN-0036 (7SE63)The Aftertreatment System Technician's Guide (DDC-SVC-MAN-0036) wasrevised to include theDD15 REQUIREMENTSA dded row toTable Maintenance …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, ...You said Doc inlet pressure was high and after regen the pressure dropped down ? Any noises coming out from -box during regen or during driving? mhyn, Nov 3, 2019. mhyn, Nov 3, 2019 #5 + Quote Reply. Nov 4, 2019 #7. jdpromo33 Bobtail Member. 13 2. Nov 3, 2019 0.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 to2018 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 regenExhaust Gas Temperature 1 – DOC Inlet (℉) 07E02281F9; C462058136F9; 4010; 000900050020; EG1; 4.22 Required; Usage Notes. If this XGauge reads 32 °F try changing the RXD and MTH to the following: ... Time since Active Regen (Hours) DEF Level (%) DEF Temperature (°F) DEF Quality (%) DEF Dosing Rate (gph) Aftertreatment Intake NOx (ppm)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.

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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 .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 ...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.This guide will assist with diagnosing regen related codes and issues for EPA 07 MBE 900 Engines. DOC inlet temp must be at 525° F or higher to dose fuel. If over 50% and Doser line pressure is above 50 psi, this indicates a doser injector obstruction.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.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. 9. Monitor DOC inlet and outlet temperatures. Are the temperatures within 25°C (45°F) of each other? 9.a Yes; Check valve lash and engine brake rocker lash. If either is out of adjustment, readjust the lash, perform a parked regeneration, and continue with the initial diagnostics that directed you to DOC inlet temperature will not EGT stands for Exhaust Gas Temperature. The EGT sensor is responsible for reading the temperatures of the aftertreatment system components such as inlet DOC, ...This guide will assist with diagnosing regen related codes and issues for GHG14 DD Engines. Engine Speed 1100 rpm (1275 rpm during first 12 minutes of regen … ….

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 ...Diesel Oxidation Catalyst Temperature Drift - Inlet High or Outlet Low Table 1. SPN 3242/FMI 20 Description 70°C (126°F) Difference During Non-regeneration Mode Monitored Parameter Diesel Oxidation Catalyst (DOC) Inlet Temperature vs. DOC Outlet Temperature Typical Enabling Conditions Coolant Temperature Greater than 60°C (140°F); Regen not ...Once the DOC is heated up, it can produce high-efficiency oxidization of the post-injected fuel for the DPF regeneration. Based on the DOC light-off temperature achieved, the in-cylinder post fuel injection along with further modulation of the air system parameters can be used to reach a sufficiently high inlet gas temperature for the DPF ...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.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 ...Oct 5, 2021 · The DPF system is a honeycomb filter, similar to a traditional catalytic converter, that captures and collects particulate soot. The 6.7 Cummins has had a DPF system since halfway through the 2007 model year. 2007.5-2012 models had a completely separate DPF system that sat behind the DOC system. In 2013+ models the DOC and DPF were integrated ... 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.- During the high speed portion of the test, inlet NOx levels remain above 500 ppm, and outlet NOx levels are approximately 300 ppm as expected. - DTC P220E may be generated when this condition is observed. Replacement of the sensor returns values to the expected range: - If the above condition is present: • Replace the Inlet NOx SensorDuring 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 ... Doc inlet temp during regen, Ran an onboard filter cleanliness test to get the regen temps. Soot load was at 44%. Doc intake temp is 775 to 800. Dpf inlet is 1150 to 1185. Dpf outlet is 1220 to 1270. TC1TOP IS 1.5. EGR position is 35%. International is telling me its not eligible for the crankcase filter update, last 8 of vin: EL771725., 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. ... I would think if there was an issue with the DOC the inlet temp would be off and other temps as well. For example, if the DOC is face plugged the outlet temp usually ..., Using DiagnosticLink during the regen, view AS087 Actual Fuel Mass. Is the fuel mass above 100 mg/st? Yes; ... 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., The stage1 is before regeneration phase. The DOC inlet temperature, the DPF inlet temperature, and the DPF outlet temperature are sequentially lowered due to the heat loss. The stage2 is during regeneration phase. The DOC inlet temperature slightly reduces due to the vaporization heat of methanol., 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 ... , 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 ACM21T, 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)., You said Doc inlet pressure was high and after regen the pressure dropped down ? Any noises coming out from -box during regen or during driving? mhyn, Nov 3, 2019. mhyn, Nov 3, 2019 #5 + Quote Reply. Nov 4, 2019 #7. jdpromo33 Bobtail Member. 13 2. Nov 3, 2019 0., 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., 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. , 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 …, DOC inlet temperature; DPF inlet temperature; DPF outlet temperature; The MAXIMUM difference between the sensor readings should be 24 o C (43 o F). If the difference exceeds 24 o C (43 o F), replace the temperature sensor module assembly (the 3 temperature sensors are connected on the same CAN-BUS module and cannot be replaced separately, or …, If your psi sensor is cleared and your temps still don’t come up, you’ll need to pull the DPF’s back out and Blow or out the DOC’s. Remove the 1-box inlet and rig a good vacuum cleaner to or all that soot will settle in front of the DOC and plug at least part of them again!, ... inlet temperature sensor. Source: Cummins Quickserve. 2009 Cummins ISL Air Intake Overview ... DOC w/ DPF Emissions Control Systems Service. Exhaust, Intake and ..., 1 NUMBER: 2 ATS 07 S.M. REF.: Listed in Table 1 ENGINE: ATS DATE: April 2007 SUBJECT: UPDATES TO AFTERTREATMENT SYSTEM TROUBLESHOOTING PUBLICATION: 7SE63 The Aftertreatment System Technician's Guide has been revised. MANUAL REFERENCE Section 6.1, Mechanical Troubleshooting 9.1, SPN 3242/FMI , …, During regen the temp doesn't get over 305. I thought it had to hit over 500 to kick on injector 7. ... We removed the DPF and DOC and got them baked and blew out. ... Constant regens. Two obd codes. Inlet trap pressure and particulate trap 1 ..., 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., 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 ..., DPF Outlet Temp 1000 – 1150° F 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 dose fuel • If over 50% and Doser line pressure is above 50 , 25. Is the Selective Catalyst Reduction (SCR) inlet temperature lower than SCR outlet temperature by more than 38°C (68.4°F)? Example: SCR outlet temperature is 588°C (1090°F) -SCR Inlet Temp 398°C (749°F) = 171 °C (341 °F). Difference between inlet and outlet is 171 °C (341 °F), which is greater than 38°C (68.4°F)?, 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 ..., 9. Monitor DOC inlet and outlet temperatures. Are the temperatures within 25°C (45°F) of each other? 9.a Yes; Check valve lash and engine brake rocker lash. If either is out of adjustment, readjust the lash, perform a parked regeneration, and continue with the initial diagnostics that directed you to DOC inlet temperature will not, Temperature should begreater than 100 C (212 F) prior to parked regeneration initiatesand runs indefinitely. (IntakeThrottleonSeries60,DD15,andMBE 4000 or Exhaust Flap onMBE 900 does NOT close, andthereisnoHESTL ampafter25minutes.)Engine in smoke control modeMonitor smoke control status during regen. Smoke controlstatus should be Inlet ..., Joined: Nov 2011. 6 10-28-2020, 10:36 PM. i have a volvo 2015 d13 with similar issue unit will start regen just fine. but when fuel doser comes up temp 1 is 520 temp 2 starts to climb really fast temp 3 doesnt follow and by the time temp 2 gets to 1000 ( withing 1 minute after doser starts to dose ) it turns off the fuel doser and turbo speed ..., 25. Is the Selective Catalyst Reduction (SCR) inlet temperature lower than SCR outlet temperature by more than 38°C (68.4°F)? Example: SCR outlet temperature is 588°C (1090°F) -SCR Inlet Temp 398°C (749°F) = 171 °C (341 °F). Difference between inlet and outlet is 171 °C (341 °F), which is greater than 38°C (68.4°F)?, 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., 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 cleaning , 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 …, 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 ..., All of the temperatures pressure dosing quantity correct,the whole system removed from the truck and cleaned. Even a DEF tank flushed and refilled. It to the regen starts normally low PPM on the outlet 80% efficiency and then it slowly goes down to 0 and that's it,truck keep regen and it never stops. Any help would be appreciated thanks., If your psi sensor is cleared and your temps still don’t come up, you’ll need to pull the DPF’s back out and Blow or out the DOC’s. Remove the 1-box inlet and rig a good vacuum cleaner to or all that soot will settle in front of the DOC and plug at least part of them again!, 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 …