07 Duramax Code P0401

EGR Removal / Delete. engine codes. 7 Powerstroke Diagnostic Trouble Code List DTC. In that sense, if you can see that the code is present and at the same time the MIL is illuminated, then at least one transmission code has been set in the memory of TCM. Any ideas? Hi r/diesel , We've been beside ourselves trying to figure out what to do to fix our intermittent DIC engine check light. What could be wrong?. Y does my po401 code keep poping up? on my duramax 07' 6. The code P0677 tells you that something in the glow plug circuit is faulty causing the glow plug on cylinder #7 to fail to heat up. Cost of diagnosing the P20E2 code. If a dealer encounte rs a light or medium duty vehicle that may benefit from this type of. Causes: A code P0401 most likely means one or more of the following has happened:. We recommend Torque Pro. also what I have done in the past is, leave the radiator cap on the first click so the sysem wont build pressure and see if you still loose fluid. I followed the pinpoint test for this dtc and according to the test the ECM was faulty. 0 world not only because they have extremely smooth power and good transmission tuning, but also because they give the end user the ability to shut off the check engine light associated with the check engine codes P0401 and P0404. Code description, posible causes and repair information | Powertrain Codes Page 1 | AutoCodes. You never received one? I have starting issues, black smoke, runs rough. I replaced the ECM but the code keeps coming back. 0 The cost of diagnosing the P20E2 code is 1. With the 402 code it sounds like the truck had the EGR stuck in the open position for a little while. This EGR Override Circuit "Finger Stick" is For the GM 2500/3500 LLY 6. Welcome to the GMC Check Engine Light codes page. The auto repair labor rates vary widely across the country, and even within the same city. 6L Duramax EGR manifold. The guy at Strictly Diesel in Arizona is telling the dealer that I am buying it from that this has happened only 3 times before. at dealer right now they want $300 for a new EGR motor plus $150 - Answered by a verified Chevy Mechanic. carbon built is the most common cause of the egr not working correctly. When i get it started , with starting fluid. The code P0677 tells you that something in the glow plug circuit is faulty causing the glow plug on cylinder #7 to fail to heat up. engine codes. CASE 1: If your multimeter displayed 0. I checked around, no loose fittings, so I cleared the code to see what would happen -- it hasn't come back. I'd personally look into blocking it and getting either the finger stick or a tuner that can block the codes. DPFE sensor failure is a fairly common problem on the Focus, and as more and more older foci get more and more miles, the failures are becoming a lot more common. Chevy/GM Duramax Diagnostic Trouble Codes (DTC) Diagnostic trouble codes (or fault codes) are codes that are stored by the on-board computer diagnostic system. I realize mine is not a Duramax, nor does it have any of that PDF crap, but my reduced power light was coming on the other day and my truck was doing the same thing as yours (no power, can't exceed 30 mph, etc. I have cleaned the valve twice and confirmed out holds pressure. 0 hour of labor. 6L Duramax Diesel Engines (Years: 2006-2007). If the EGR valve needs to replaced, it's probably time to clean the EGR cooler. Diesel Power Products carries the Factory OEM EGR Valve for 07. Visually inspect the related wiring harness and connectors. The mass air flow sensor still comes back. I replaced the ECM but the code keeps coming back. Insufficient Exhaust Gas Recirculation (EGR) Flow. 0L diesel and 07 Sierra Duramax. With the EGR system removed, you’ll no longer be cycling hot exhaust into your intake, lowering overall intake temperatures and making more power and more torque on the track. WHAT IT MEANS WHEN YOUR GET A CODE READ OF PO420 OR PO430. Should be a simple 2-wire splice. After 100 miles code came back. I contacted Duramax Tuner about building a tune which killed the EGR and Intake air heater codes but they never replied. Can be all coincidence this happen,Just want to see anyone might know what this noise is in the video. The auto repair labor rates vary widely across the country, and even within the same city. 6L Duramax EGR manifold. I followed the pinpoint test for this dtc and according to the test the ECM was faulty. NOx gases, which are a leading cause of acid rain and in some people, respiratory problems, are formed when the engine combustion temperatures become too high (2500° F). 6 turbo P1093 and P1094. I have a 2006 duramax diesel and it is throwing the p0401 code "Exhaust Gas Recirculation Flow Insufficient - Answered by a verified Chevy Mechanic 07 2500hd LBZ. Below are common check engine light trouble codes for the Chevy/GM Duramax diesel. soot trap, and a closed crankcase ventilation (a. The DPF will fill up with soot during typical operation, such as stop-and-go driving. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Whether you are looking to tow or race, we have what you need to make your truck perform. I have a 2006 duramax diesel and it is throwing the p0401 code "Exhaust Gas Recirculation Flow Insufficient - Answered by a verified Chevy Mechanic 07 2500hd LBZ. To access the trouble code memory, connect an OBD II scan tool to the 16-pin DLC connector located behind the right-hand side of the front console. Most auto repairs shops charge between $75 and $150 per hour. Sure, the DPFE has a high failure rate, but do we "throw" the part at it, or do we test it to be sure it's actually failed. 0 hour of labor. Great prices, large selection, and free shipping on diesel repair and performance parts for Powerstroke, Cummins, and Duramax diesel trucks. To diagnose a P0420 trouble code we begin by checking for exhaust leaks under the vehicle. Symptoms: You may notice drivability problems such as pinging (a. Whether you are looking to tow or race, we have what you need to make your truck perform. This list has been updated to includes Chevy/GM Duramax diagnostic trouble codes. ) I took it in to get looked at because when I would get on it a little it would kick into limp mode as your saying. 5-2007 Duramax BD SuperMax Turbo Install Guide Published on Sep 21, 2009 Designed as a direct replacement for the stock turbo, the SuperMax system comes with everything needed for. Check the rear Heated O2 Sensor. 06-07 Chevy Duramax Diesel EGR Code Blocker LLY/LBZ Motors. I'd personally look into blocking it and getting either the finger stick or a tuner that can block the codes. When a vehicle has the fault code P0172 and or P0175, it means that computer can no longer automatically adjust the mixture between air and fuel. 6L LLY/LBZ Edge Juice w/ Attitude CTS2 - 21502 Duramax V8 engine - Wikipedia Details about aFe Power Cold Air Intake Stage 2 Si Pro Dry S For GM. The Duramax name is a GM thing, the 6. We recommend Torque Pro. I think it is right behind the fuel filter and ac canister. Alright guys! Looking for some good helpful info. 0 psd Excursion. got codes P0401, P006a, P0070 this last weekend towing a 10k trailer in my 2004 6. p0299-turbo charger underboost. You may not notice if you have catalytic converter problems but the environment will. This list of faults, also called DTC (for Data Trouble Code) has been defined so that any diagnostic device can read and decode them. maybe pick up a pressure tester and pressurize the system over night and you might spot the drip, might not. I have a 98 toyota rav 4 and the engine light came on. 0L Powerstrokes. I have a 2007 GMC 2500HD Duramax Had my EGR valve replaced as I had a code P0401. 5-05 LLY Forum Chevy / GMC Duramax 01-04. 06-07 Chevy Duramax Diesel EGR Code Blocker LLY/LBZ Motors. 2007 chevy duramax p0401. Well, it was wishful thinking! Today, even though it was running smoothly, the Check Engine light came on. P0401 - Insufficient EGR flow - Knew that one and no big deal - need to fingerstick it P003a x2 - Turbocharger Boost Control Position Not Learned (just learned what that code was a few hours ago) P0108 - Manifold Pressure Circuit High Imput P0700 - Transmission control system (MIL request). Anything P1000 to P1999 or P3000 to P3400 will be Manufacturer specific and may not match the ones listed here. Rough idle. Do a PPE tuner and that will solve all your issues. 2006 LLY engine discussion also belongs in this forum due to the similarities of the 2006 LBZ and the 2006 LLY. The P0401 code means that OBD detected an insufficient amount of EGR. How to clean a 6. O2 sensors are fairly new (~20k miles ago). This may be because the desired boost is set too high, or because there's an issue with the induction or vane actuation system causing the turbocharging system to lag behind the desired boost level. i know P0401 is the EGR, the really isnt the problem i can fix that one. 2006 LLY engine discussion also belongs in this forum due to the similarities of the 2006 LBZ and the 2006 LLY. Alright guys! Looking for some good helpful info. Someone gets a check engine light. Can some one help. Shown below also are OBD2 codes and their description which you can use for fixing one of these wicked chevy engine codes. My truck sat for 3 months getting body repair and these little vanes rusted onto the posts and wouldn't come. P0401 Diagnostic Trouble Code Discussion for June 2013 Insufficient EGR Flow Detected * Note: This is a professional automotive technician's resource. Here is how to test code P0401 and the DPFE sensor. P0401 is the bane of my existence. The code(s) will tell you which sensors or systems are experiencing a problem. ( the 4cyl 5. 6L Duramax Diesel Engines (Years: 2004. Why these codes? Well, these are the most common codes. This is the only thing that I have done. truck has 135,200miles. To save money they take the car to aurozone or read the codes with a code reader. on 08/07/12 09:17pm Forgot to include that it is a 2006 Duramax. In the duramax world (I just traded my dmax for a 2010 laramie 6. Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder. Tips on performance, fuel economy, troubleshooting and more. 5-05 LLY Forum Chevy / GMC Duramax 01-04. Those are lean codes and a MAF (P0101) code. 0 The cost of diagnosing the P0401 GMC code is 1. I do not care about the code, i can delete it any time with my Edge Insight and we have no diesel emissions in my state. So you then go and scan the vehicle and you get the code B2960 (key code incorrect but valid). P0401 code duramax. Also wandering if i need any special tools. got codes P0401, P006a, P0070 this last weekend towing a 10k trailer in my 2004 6. Duramax LBZ and LMM P0087 Low Fuel Pressure code Summer comes, temps rise, and the working trucks with relatively high miles start to set a P0087 code and go into limp mode while towing. At Thoroughbred Diesel we are a real diesel performance and repair shop that offers free advice. What is an EGR Valve? The EGR valve works by recirculating a measured amount of the exhaust gases back into the engine through the air intake system, reducing the amount of emissions the engine produces. anyone know this code he hates the dealer so he was hoping you guys might have the scoops on this one. 2007 chevy duramax p0401. Alright guys! Looking for some good helpful info. 5-10 LMM Duramax Powertrain > P0401 engine scanned it and the P0401 code came up. Great prices, large selection, and free shipping on diesel repair and performance parts for Powerstroke, Cummins, and Duramax diesel trucks. p0403 code came up, 63k miles. Well, still getting poor gas milage and now w/ new codes p0300 (multiple misfire) and p0401 EGR low flow. P0401 on the 6. 5 LBZ & LLY) of the 6. I have a 2006 duramax diesel and it is throwing the p0401 code "Exhaust Gas Recirculation Flow Insufficient - Answered by a verified Chevy Mechanic 07 2500hd LBZ. Please let the video be your best instruction. 4 Powerstroke Diagnostic Trouble Codes (DTC) 08-10 Ford 6. Scanner threw out code P0335 crankshaft position sensor circuit malfunction. eaton ulta shift 1st gen code 71 75 37, when you put it in gear (drive) it turns off puled xy shifter it looks for neutral, trans goes in gear when xy shifter is off and you put it in gear truck wont shut down but xy wont move. P0401 Insufficient EGR Flow Technical Description. NOx gases, which are a leading cause of acid rain and in some people, respiratory problems, are formed when the engine combustion temperatures become too high (2500° F). Thanks Oscyjack, That's what I figured but wanted to get everybody's take on it. Do a PPE tuner and that will solve all your issues. What does that mean? This code is a generic powertrain code. It is my preferred way to improve power, economy, and drivability on the Duramax. The code P0677 tells you that something in the glow plug circuit is faulty causing the glow plug on cylinder #7 to fail to heat up. Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder. 6 duramax diesel. The engine light came on(not sure on code have to get it read) then took it for a ride and its making a bad whining noise. Thanks Oscyjack, That's what I figured but wanted to get everybody's take on it. These engines are found in 2003-07 Ford Super Duties. In the duramax world (I just traded my dmax for a 2010 laramie 6. I cleared it. It's true there is nothing "wrong" it's just that the computer senses too much flow getting out and throws the code. w/o scan tool narrowed down to cp3 fuel pump/ or small outside chance of the rail pressure sensor faulty. If the EGR plate didn't fix the code that there is a cut or fraid wire in the harness, he has to locate what wire it is and repair it for the code to go away. Chevy / GMC Duramax 06-07 LBZ & LLY Forums. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. engine codes. This video goes over how to replace the EGR valve and EGR cooler on a Chevy Silverado 2500 6. P0401, P0402, P0403, P0404? Cause if your. P0401 is the bane of my existence. Exhaust Gas Recirculation Flow (EGR) Excessive Detected. Tips on performance, fuel economy, troubleshooting and more. Code P0299 "turbo underboost" Resolution Repository If you get a CEL / Emissions Workshop message, have the code read and it comes back with P0299 turbocharger underboost - please post what you did to resolve the problem to this thread. The code description is for a flow problem with the EGR. These tuners are very popular in the 6. When i get it started , with starting fluid. Duramax 6600 Welcome to the Internet's first Duramax 6600 diesel discussion forum for the LB7, LLY, LBZ, LMM, LML, LGH & L5P RPO code engines. 6 turbo P1093 and P1094. MAF "looks" okay, air - Chevrolet 2005 Silverado 2500HD 2WD question. Those are lean codes and a MAF (P0101) code. Had to put it back til i got the stuff to delete it which was even 1000 miles yet and it had already started clogging back up. If the malfunction indicator/check engine lamp remains lit or comes on while the engine is operating, the ECM has detected a malfunction and has stored a trouble code in its memory. New emission standards in the United States could mean the end of the Duramax engine, find out the fate of the Durmax in this article by Diesel Power Magazine. We contacted our local expert, Crede Young from Diesel Dynamics, and aftermarket power expert Tadd Layton from Elite Diesel Engineering, to discuss the most common DTCs (Diagnostic Trouble Codes) for the 6. DTC P0401; EGR solenoid circuit negative deviation. 6L Duramax Diesel Engines (Years: 2006-2007). The OBDII fault code P0401 means that the engine computer has detected that the Exhaust Gas Recirculation (EGR) system flow is insufficient. I checked around, no loose fittings, so I cleared the code to see what would happen -- it hasn't come back. Not sure where to post this. Chevy / GMC Duramax 04. The code P0677 tells you that something in the glow plug circuit is faulty causing the glow plug on cylinder #7 to fail to heat up. What Does P0406 Code Mean? OBD-II Code P0406 is defined as a Exhaust Gas Recirculation Sensor A Circuit High. OBDII P Code Definitions. After 100 miles code came back. 0 The cost of diagnosing the P20E2 code is 1. Aside from the freeze frame info, I have been resetting the OBD-II computer repeatedly to see if a pattern could be established. I had to change the BSB sensor and EGR modulator. First diagnose P0401 code. Duramax LBZ and LMM P0087 Low Fuel Pressure code. Often this code causes the Check Engine light to come on and off in cold temperatures. 07' LBZ PO402 Code. They erased the code. I have a 2007 GMC 2500HD Duramax Had my EGR valve replaced as I had a code P0401. 6L LMM GM Duramax. P0401 code duramax. Need to know why. 5 2500 duramax with engine light on. Take your Duramax-equipped truck out for an extended straight drive, such as on the highway. Y does my po401 code keep poping up? on my duramax 07' 6. Scanner threw out code P0335 crankshaft position sensor circuit malfunction. The information I give from here is from what I have seen and is my opinion for some of the problems that cause this code. 7 Powerstroke Diagnostic Trouble Code List DTC; Ford 6. Monitor the CKP and CMP signals. 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. I do not care about the code, i can delete it any time with my Edge Insight and we have no diesel emissions in my state. 8, some parts do swap, piston liners are almost identical as is valve train ). So far I have changed the vacuum switch, the vacuum valve and the EGR valve. Thanks Oscyjack, That's what I figured but wanted to get everybody's take on it. I have a 2005 Pony Express Motorhome on a C5500 Kodiak chassis with a 6. Kennedy Diesel is your source for Duramax performance. 6L LMM GM Duramax. I have a 2006 duramax diesel and it is throwing the p0401 code "Exhaust Gas Recirculation Flow Insufficient - Answered by a verified Chevy Mechanic 07 2500hd LBZ. Should be a simple 2-wire splice. My 1997 RAV4 AWD has begun producing the P0401 code. 0 hour of labor. 0 The cost of diagnosing the P0098 code is 1. I now have a P0401 (EGR insufficient flow). Chevy/GMC Duramax 06-07 LBZ Discussion of Chevy and GMC Trucks with If EGR flow deviation is detected, DTC P0401 or P0402 will set. not on your list. Approximate Time: 7 Hours Tools needed: 12mm Socket short and deep, 14mm socket short and deep, 3/8. The truck still is throwing a P0402 code. This list has been updated to includes 2010 Dodge Cummins 6. Leader in Diesel Truck Performance Tuners, Exhausts, Fuel Pumps, & More. BDI code is P0401. 2007 chevy duramax p0401. OBDII P Code Definitions. Check Engine Light Codes. can you help with this problem?. In cars with the code-protected audio systems, you might need to enter the code to unlock it after the battery is disconnected. P0403 EGR Solenoid Control Circuit. 7L Ford Powerstroke EGR delete kit will help you get the best performance out of your Powerstroke engine. 0 Powerstroke? Check this list of DTC (diagnostic trouble codes) and see what is wrong with it. CEL light came on after a fill up, checked with scan gauge and found code P0403 which is EGR solenoid control circuit. #PIP4516D: Light and Medium Duty Trucks EGR DTC P0401 - keywords 07 08 09 6. Chevy/GMC Duramax 06-07 LBZ Discussion of Chevy and GMC Trucks with If EGR flow deviation is detected, DTC P0401 or P0402 will set. on 08/07/12 09:17pm Forgot to include that it is a 2006 Duramax. P0401 on the 6. P0402 EGR Excessive Flow Dectected Technical Description. This Sinister Diesel LBZ Duramax EGR Delete Kit for the 2006 & 2007 Chevrolet 2500 & 3500 HD installs in place of the stock EGR system. DTC P0401; EGR solenoid circuit negative deviation. If the malfunction indicator/check engine lamp remains lit or comes on while the engine is operating, the ECM has detected a malfunction and has stored a trouble code in its memory. Scanner threw out code P0335 crankshaft position sensor circuit malfunction. One of the commonly overlooked contributors to decreased diesel engine performance is the carbon deposit that builds up inside EGR-equipped trucks' intake manifolds. After 100 miles code came back. I read somewhere else where a GM tech explained that is was the airflow increase beyond set parameters of the MAF and not the oil from the filter that was the cause. The problem lies with the exhaust gas that contain carbon deposits. Automotive technician members of iATN have posted over 1138 automotive repair related questions in the month of April, resulting in over 8606 responses. EGR Removal / Delete. Brief description of our problem, Started truck w/o problems drove it for about 15 minutes, parked it let it idle for approx. Cost of diagnosing the P20E2 code. Symptoms: You may notice drivability problems such as pinging (a. Not this time though. Common Symptoms. Shops report problems with P0440, P0441, P0442, P0446 EVAP codes on GM vehicles. Of course it had to be the egr valve, we check it here at work to verify thats what it was and of cousre I was right. 07 LBZ, just turned 50k. Any body have any experience with this? it is an 03, XL7 4WD W/ 67000 miles, California smog. What could be wrong?. Someone gets a check engine light. Why P0299 fault code is related to your turbocharger boost pressure that can cause low engine power. P0420 is a diagnostic trouble code (DTC) for "Catalyst System Efficiency Below Threshold (Bank 1)". This circuit modifies the MAF signal to the computer on the LLY engines (Not LB7, Not LBZ, Not LMM) to expected levels when the EGR is blocked off, modified or a big free flowing exhaust system (removing the cat) causes the ECM to set an EGR code and display the check engine. What Does P0406 Code Mean? OBD-II Code P0406 is defined as a Exhaust Gas Recirculation Sensor A Circuit High. P0402 EGR Excessive Flow Dectected Technical Description. Designed for 2011-2014 models. I recently deleted a dpf on a customers truck, as well as set several code's to: non emmisions mil off, and still have the light on, these are the reoccuring codes P0401, P2033, P2455, P0546. See: Testing and Inspection\Diagnostic Trouble Code Tests and Associated Procedures TYPICAL SCAN TOOL DATA. #PIP4516D: Light and Medium Duty Trucks EGR DTC P0401 - keywords 07 08 09 6. maybe pick up a pressure tester and pressurize the system over night and you might spot the drip, might not. 1999 Chevy Suburban with P0405 then P0404 then P0405 Codes Any idea what this might be. The best (safest)way to erase trouble codes is to use a scan tool. The DPF will fill up with soot during typical operation, such as stop-and-go driving. Chevy/GMC Truck and Duramax Turbo Diesel Forum - Discussion of General Topics related to All Chevy and GMC Trucks as well as the Diesels in them. Can some one help. Sinister Diesel EGR Delete The gains from installing an EGR Delete on your Cummins extend beyond reliability and keeping your intake soot-free. Take your Duramax-equipped truck out for an extended straight drive, such as on the highway. My 1997 RAV4 AWD has begun producing the P0401 code. 6L Duramax EGR manifold. Note: If a P0670 trouble code is present along with this DTC, carry out P0670 diagnosis before diagnosing this code. This video goes over how to replace the EGR valve and EGR cooler on a Chevy Silverado 2500 6. Check for damaged components and look for broken, bent, pushed out, or corroded terminals. I know the p0401 is egr code, p006a is map-mass airflow code, p0070 is ambient air temp sensor codes. 6 - Answered by a verified GM Mechanic We use cookies to give you the best possible experience on our website. The final part in this series will cover the 6. I have a 98 toyota rav 4 and the engine light came on. After 100 miles code came back. 0 hour of labor. It is my preferred way to improve power, economy, and drivability on the Duramax. P0401 egr insufficient flow. Usually this means your catalytic converter needs to be replaced or there is a problem with your O2 (oxygen) sensors. p0401-exhaust gas recirculation flow insuff detected. Below are common check engine light trouble codes for the Dodge Cummins diesel. Whether you are looking to tow or race, we have what you need to make your truck perform. com has the pigtail for $30 shipped, so I should be in the clear once it arrives. I replaced the ECM but the code keeps coming back. The auto repair labor rates vary widely across the country, and even within the same city. 06-07 Duramax 6. It is important to remember that if your "Check Engine Light" illuminates and someone just simply reads a code of PO420, 421, 430 or 431 this does not necessarily mean the Catalytic Converter is bad! All that code says is either Converter operating below efficency or Converter. 0L Power Stroke Diesel - Possible P0401 fix after EGR delete - I did an EGR cooler delete with a sneaky pipe a few months back while replacing a completely blocked oil cooler. Obviously. The P0401 code means that OBD detected an insufficient amount of EGR. This kit provides your engine with improved exhaust gas flow, resulting in faster turbo spool, lower engine temperatures, and more power to the ground. At Thoroughbred Diesel we are a real diesel performance and repair shop that offers free advice. The guy at Strictly Diesel in Arizona is telling the dealer that I am buying it from that this has happened only 3 times before. This page lists OBD-II generic powertrain trouble codes, a. What is an EGR Valve? The EGR valve works by recirculating a measured amount of the exhaust gases back into the engine through the air intake system, reducing the amount of emissions the engine produces. P0405 EGR Position Sensor Circuit Low Voltage. Sell 2006-2007 Chevy Duramax LLY / LBZ EGR Code Blocker Finger Stick Signal Modifier motorcycle in Buena Park, California, US, for US $49. Why these codes? Well, these are the most common codes. The code(s) will tell you which sensors or systems are experiencing a problem. What Does Code P0402 Mean? A malfunctioning EGR system will cause several codes such as P0400 or P0401-P0409 to be displayed. Chevy/GM Duramax Diagnostic Trouble Codes (DTC) Diagnostic trouble codes (or fault codes) are codes that are stored by the on-board computer diagnostic system. You have an LBZ. P0401 is the bane of my existence. Then use an oscilliscope to check the waveforms of both upstream and downstream O2 sensors. 4 Powerstroke Diagnostic Trouble Codes (DTC) 08-10 Ford 6. Well, it was wishful thinking! Today, even though it was running smoothly, the Check Engine light came on. After driving for a few minutes the light came back on. When a vehicle has the fault code P0172 and or P0175, it means that computer can no longer automatically adjust the mixture between air and fuel. The OBDII fault code P0401 means that the engine computer has detected that the Exhaust Gas Recirculation (EGR) system flow is insufficient. This list has been updated to includes Chevy/GM Duramax diagnostic trouble codes. 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. The DPF system will store soot during this type of operation, but the engine will not get hot enough to engage regeneration mode. i know P0401 is the EGR, the really isnt the problem i can fix that one. P0401 Insufficient EGR Flow Technical Description. Sure, the DPFE has a high failure rate, but do we "throw" the part at it, or do we test it to be sure it's actually failed. Until I down loaded my stock tune in my autcal. My 07 Chevy 6. It was a major PITA. No ABS or brake light on, just the check eng light. eaton ulta shift 1st gen code 71 75 37, when you put it in gear (drive) it turns off puled xy shifter it looks for neutral, trans goes in gear when xy shifter is off and you put it in gear truck wont shut down but xy wont move. 0 psd Excursion. P0299 obd2 code and how it affects your turbocharger for chevrolet duramax diesel. Y does my po401 code keep poping up? on my duramax 07' 6. The auto repair labor rates vary widely across the country, and even within the same city. Should be a simple 2-wire splice. Exhaust Gas Recirculation Flow (EGR) Excessive Detected. 6 V8 shares no parts with the 7. Check specific manufacturer pages on the site, as some of them, we list the OBD2 codes on those pages for those specific vehicles. I was set up with an ~05 or so Duramax, then they swapped rigs on me and I got a 90's era power stroke dually.