Repair all damaged wiring and connectors before moving on to the next step. After that, connect the scanner to the vehicle's OBD port to obtain all of the stored codes and other relevant information. Before moving on to the next step, clear this code and all the freeze-frame data. Step Two: Check the Voltage.DTC code 2459 stating regeneration frequency. I also have P0101 code stating MAS sensor problem. My truck has been in multiple times since purchase in Nov. 2012 regarding regeneration. Off the lot burns were about 450 miles between regen modes. ... If you have a Duramax LML engine that is or has in the past not performed properly, posted a DTC ...P0229 and P0101. I started getting P0299 and P0101 codes on my 2006 Chey Silverado 2500ext cab w/8' bed Dmax ( no mods ever done to the engine) has 250,000. research looks like a sticky turbo and MAS . There are holes in my exhaust so I'll probably have to go with a complete turbo back exhaust and replace the turbo .My 2015 Duramax with 130k miles threw a P01F0 code, which my scanner and other threads on here confirm is a low coolant temp. Based on other threads here, and what I've researched online, the thermostats were the most likely culprit. I've changed them and my temps are still low. Today I changed the coolant temp sensor, still low.P0101 after Intake/exhaust/EGR delete. I helped a buddy put an intake, exhaust and EGR block off on his 07 classic LBZ and then i tuned it....with HP Tuners, not EFI. We went for a quick drive and all was well until the CEL came on. Turned out to be a P0101, MAF code. The sensor itself is installed properly and known to be good.MAF, P0101 code after K&N filter instal. Has anyone had a problem with the MAF sensor out of range after installation of any aftermarket air cleaner and is there a fix for the sensor. The sensor is not bad it‚Äôs doing what it is supposed to do and the system is alerting me by way of check engine light. I have heard of oil getting on the ...All stock (ignore the sig...) Truck keeps popping a P0101. I have made no changes in the last 2 years. ... I fought the same code 3 different times. 1st time had it deleted then 2nd time changed air filters and 3rd time unplugged Egr and never came back on . ... Duramaxdiesels.com was founded in 2006 and created a site which houses some of the ...Chevy / GMC Duramax 06-07 LBZ & LLY Forums. 06-07 LBZ & LLY Duramax Powertrain Help, CEL P0101 MAP & P0299 Underboost. No power & black smoke. ... My LBZ threw the P0101, U1301, & P0299 codes last night. I cleared it with my insight CTC and it came back on a couple minutes after driving it. Any ideas?2007.5 Chevrolet 2500 HD 6.6 Duramax Diesel K&N Full Intake/ Quadzilla Stealth 2 Tunner. Save Share. Like. Sort by Oldest first Oldest first Newest first Most reactions. ... I get the reduced engine power and the code P0101. I have cleaned the Maf sensor and replaced it. I even put the stock air box back on and still get the same code and ...Jul 28, 2015 · 265 posts · Joined 2008. #1 · Jul 28, 2015. My truck is going into reduced engine power after it has been driven for awhile and then I stop and let it idle for a couple of minutes. I hooked up my EFI live and it is showing code P0101 Mass Air Flow Sensor. So I did a little reading and seen that some people fixed this problem by cleaning the ...The P0101 code can often be associated with a P0100, P0102, P0103 and P0104 codes. What the P0101 code means P0101 is the general code for a problem with the Mass Airflow Sensor (MAS) operating range and/or an engine performance issue.Hello, I have a 2007 Chevy Silverado with a Duramax engine. The check engine light keeps coming on with code P0101 MAF performance. The MAF was already replaced. I followed the pinpoint test for this dtc and according to the test the ECM was faulty. I replaced the ECM but the code keeps coming back.Chevy / GMC Duramax 07.5-10 LMM Forums. 07.5-10 LMM Performance Parts Discussion P0101 with new air filter ... Now it throws a code p0101. It doesnt do it with the stock filter. Is it possible that the AFE filter flows too much? I have never run into this before. I did pull the MAF out and clean it although it wasnt really dirty.2006 LBZ duramax silverado CCSB 4x4. Banks power big hoss kit with power pda,Slightly modified Owned for 12 years ... With a P0101 codes, guys get too hung up on the MAF sensor being the culprit. While it is possible the MAF sensor could be defective, it's not that likely. That is assuming it's clean and free of oil and debris of course.I have a 2007.5 Silverado 2500HD Duramax with code P0101 and P2463. My Airflow Leak Equivalency Ratio is 2.0 and my DPF soot level is at 90. Code P2463 will trigger with vehicle not running and 'reduced power' shows on DIC. DPF differential with vehicle not running is 0.1 psi.LLY P0101 code. I have an 05 lly that keeps coming up with the p0101 mass air flow code. It does not make the check engine light come on but I was told we should fix it before putting new injectors in it. It has an S&B intake with a NON oiled filter. 4" exhaust I believe. Egr deleted. Bullydog programmer.sahlers Discussion starter. 63 posts · Joined 2011. #1 · Sep 3, 2014. My truck is throwing the code P0101 for the Mass Air Flow sensor for volume air flow/performance. I have it somewhat narrowed down, but looking for a clue as to the correct direction to head in. It is throwing the code only when the truck is warmed up, not when cold.65 subscribers. 17. 2K views 4 years ago. After checking everything else first, finally figured it out on a 2003 and the next time same code popped up on a 2002 …The P0101 code can often be associated with a P0100, P0102, P0103 and P0104 codes. What the P0101 code means P0101 is the general code for a problem with the Mass Airflow Sensor (MAS) operating range and/or an engine performance issue.Chevy / GMC Duramax 06-07 LBZ & LLY Forums. 06-07 LBZ & LLY Duramax Powertrain P0229 and P0101. Jump to Latest Follow ... I started getting P0299 and P0101 codes on my 2006 Chey Silverado 2500ext cab w/8' bed Dmax ( no mods ever done to the engine) has 250,000. research looks like a sticky turbo and MAS . ...Hey all, I have been getting a P0101 code. "Basically this P0101 diagnostic trouble code (DTC) means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. ... Truck: 2002 lb7 6.6 duramax crew cab short bed Mods: 4" cat back straight pipe dumped out before rear tire, Edge 85201 CTS Programmer, Blue VMS Racing boost increase ...If you've been looking to learn how to code, we can help you get started. Here are 4.5 lessons on the basics and extra resources to keep you going. If you've been looking to learn ...P0191 fuel rail sensor. Alright guys, I've had this engine code for awhile, and never thought it was anything, CTS says the pressure was fine until recently. The light only comes on when at idle, and the fuel pressure goes from 4.4k to 5.0k at idle. It's audible too, the engine goes from 640rmp to about 660 so I'm think it's the regulator.Open the hood after turning off the engine and removing the ignition key from its switch. Locate the MAF sensor 1 on the passenger side of the vehicle; it will be on the pipe leading from the air ...Dynaguy03 Discussion starter. 521 posts · Joined 2008. #1 · Feb 18, 2011. Hello all. I had p0101 when i changed my exhaust and air box... then i got a PPE STD and that was mo longer an issue. I recently got Rob's DSP5 tunes and now with the EFI I have p0101 again and the chk engine light comes on. I reset it with my insight only to have it ...A Cylindrical Air Cleaner Housing Calibration ID # 25779295. The incorrect calibration will induce a DTC P0101 and excessive exhaust smoke. Turbo boost trouble codes may also be found. The dealer should verify which air cleaner housing is on the vehicle, and make sure the correct engine calibration selection is made.How to Fix P0101 Code On 6.6L Duramax? (Fully Explained) Duramax P0101 is an urgent DTC (Diagnostic Trouble Code). A code may appear at anytime while driving…. Read More How to Fix P0101 Code On 6.6L Duramax? (Fully Explained) 5.3L vs 6.2L V8 Engines: Performance, Efficiency, and More.If you've been looking to learn how to code, we can help you get started. Here are 4.5 lessons on the basics and extra resources to keep you going. If you've been looking to learn ...I have on 07 LBZ classic on my way home from Texas and i just threw three codes P0101, P0102, P0299, and all of the sudden i don't have any boost out of the turbo. I know that the P0299 code has to do with the turbo, but am wondering if any of the other codes have anything to do with the turbo. ... Duramaxdiesels.com was founded in 2006 and ...S. saskboy. 325 posts · Joined 2009. #3 · Feb 23, 2010. DTC P0113. Circuit Description. The intake air temperature (IAT) sensor is a variable resistor, sometimes called a thermistor. The IAT sensor measures the temperature of the air entering the engine. The engine control module (ECM) supplies 5 volts to the IAT signal circuit.The P0101 code in Duramax means an error in the circuit of the Mass airflow sensor. This sensor measures the amount of air inlet to be mixed with fuel before entering the engine. It precisely indicates the malfunction of the air flow sensing sequence of the engine.Chevy / GMC Duramax 04.5-05 LLY Forum. 04.5-05 LLY Duramax Powertrain. P0101 maf. Jump to Latest Follow 2K views ... i've been getting code P0101, truck seems to run OK everyonce in a while it'll buck at low speed high RPM. My question is my dealer flashed the the truck to as built last year and with 2 different calibration numbers available im ...Feb 25, 2017 · A new calibration has been released to address P0401 on light and medium duty vehicles equipped with the 6.6 diesel engine RPO code LMM. Complete the current SI diagnostics for any trouble code or symptom found. If diagnostics were inconclusive it's possible the vehicle has a restricted EGR cooler.Hey all, I have been getting a P0101 code. "Basically this P0101 diagnostic trouble code (DTC) means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. ... Truck: 2002 lb7 6.6 duramax crew cab short bed Mods: 4" cat back straight pipe dumped out before rear tire, Edge 85201 CTS Programmer, Blue VMS Racing boost increase ...Apr 7, 2015 · MAF range, p0101 code. ... 2006 Chevrolet 2500HD Duramax CCSB LT3 - MBRP Downpipe, MBRP 4" exhaust, Edge CTS and Pyro, Leveled Tow Mirrors, WeatherTechs, B&W Turnover ...Subject: Possible stuck open EGR valve pintle with or without Service Engine Soon [SES] DTC P0101 P0402. Models: 2004-2009 Chevrolet Express, Kodiak, Silverado. 2004-2009 GMC Savana, Sierra, Topkick. Equipped with the 6.6L Duramax Diesel Engine RPO codes LLY , LBZ , LMM (VIN's 2 , D , 6 and 9)Sep 16, 2013 · 60 posts · Joined 2010. #1 · Sep 16, 2013. I got 07.5 Chevy 3500 HD, both codes p0401 and P 0101 keep coming up together. I can re set it. Then come right back. I planning on doing efi live. Dpf delete and mbrp 5 inch down pipe back strait pipe, I know 0101 is from mass air sensor, truck has stock intake , I am wondering if the pair of these ...The following mods are efi live from duramax tuner and straight pipe exhaust. Truck runs fine just has no turbo response. ... My truck was throwing code p0047 and would later throw code p0101 and that would cause limp mode. P0047 is the boost control solenoid. This code has absolutely nothing to do with turbo vanes or vanes position …If your truck still has the P0101 code let us know. Attachments. P0101.pdf. 159.1 KB Views: 40. ... Chevy and GMC Duramax Diesel Forum. 3.8M posts 209.6K members Since 2005 A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Come join the discussion about modifications, towing, classifieds, troubleshooting ...So much has changed about the way people make calls. For example, you can’t even call your next door neighbor’s landline without using an area code, and you certainly can’t call mo...8.1 Command the EGR solenoid to 0 percent with a scan tool. 8.2 Observe the Airflow Leak Equivalence Ratio parameter for 10 seconds. The value should be between 0.87:1 and 1.15:1. 8.3 Observe the Airflow Leak Equivalence Ratio parameter while slowly increasing the engine speed until reaching wide open throttle (WOT).Go to Duramax r/Duramax. r/Duramax. Members Online • iDB-__-ADMIN MOD Code p0101 has me stumped Share Sort by: Best. Open comment sort options. Best. Top. New. Controversial. Old. Q&A. Add a Comment. iDB-__- • I own an lb7 and have been getting MAF sensor codes. ...Nov 8, 2020 · =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0101 Saving Repair Parts...Alright so a few months back I kept getting a P0045 code. P0045 T/S Charger Boost Ctrl Solenoid Circ/Open. This is my first diesel and turbo charged vehicle and was still learning how it all worked. Many of the other threads spoke of such issue but all listed that it was one of the following issues: Vane Positon Sensor.So we tried to disable the P0101 DTC on a 2007 LMM Duramax but the after effect still is present. For example under the DTC menu we having disabled the P0101 code. We then run our test on the road and the P0101 code although not being set still puts the truck into limp. It seems the criteria and the result of the P0101 MAF Performance code will still put the truck into reduced power mode even ...Code P0101 Definition. Mass Air Flow (MAF) Sensor Circuit/Performance Malfunction. The car computer registers diagnostic trouble code P0101 whenever it detects a malfunction on the MAF sensor performance. What Does P0101 Mean? P0101 is a diagnostic trouble code, which stands for mass airflow (MAF) sensor malfunction.=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0101 Saving Repair Parts...OBD-II Check Engine Light Trouble Codes for the Duramax below: P0100 Mass or Volume Air Flow Circuit Malfunction. P0101 Mass or Volume Air Flow Circuit Range/Performance Problem. P0102 Mass or Volume Air Flow Circuit Low Input. P0103 Mass or Volume Air Flow Circuit High Input. P0104 Mass or Volume Air Flow Circuit IntermittentThe P0101 code has been set in just about every instance (probably 6 of 8 or 9) I believe the period of sitting immediately after towing is a key trigger for this failure. Basically a heat soak for the engine as the heat is trapped in the engine compartment with no air flow.Duramax Fourth Generation: 2007.5-2010 (LMM) Engine Power Reduced P0101. LMM: Jump to Latest ... Not sure if you have solved your problem yet, but just in case, I went thru pretty much the same issues as you with the P0101 code and reduced engine power. After a ton of time and money,(cleaned then replaced MAF with new) it …P0101 and a slug. I have an 05 durmax that has a low power issue off the line and to about 50-60 km an hour. It had 1 bad injector and now the balance rates are +/- 2 from 0 at idle in park. It consistantly has code P0101 and when accelerating has black smoke and is slow to accelerate, when it gets to the 50-60 kmh it then wakes up and sets you ...Evevy time it tries to regen it gets a code and reduced engine power. Sometime this code happens within literally seconds of the regen going active. Tech II says that DPF is 90g and 1.7psi, pretty high. ... '01 Chevrolet 3500 CC 4x4 DRW LB7 Duramax. Open Plenum Breather (Custom Made), Edge Juice w/Attitude, 4" Free Flow Custom Bent Exhaust ...Diagnostic Trouble Code (DTC) P0101 indicates a problem with your vehicle’s MAF sensor. Follow along as we further discuss the severity of fuel & air metering DTCsNov 8, 2020 · =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0101 Saving Repair Parts...1 post · Joined 2014. #1 · Nov 21, 2014. I recently had the check engine light come on along with "Engine Power is Reduced". Had the codes read and cleared. The code was P0101. The truck ran fine for about a month then started doing it again. I cleaned then replaced the mass airflow sensor with no luck. Turned out the egr was sticking open.Save up to 50% with a 1800 Flowers Promo Code. 24 verified 1800 Flowers Coupon today ! PCWorld’s coupon section is created with close supervision and involvement from the PCWorld d...Sep 4, 2014 · sahlers Discussion starter. 63 posts · Joined 2011. #1 · Sep 3, 2014. My truck is throwing the code P0101 for the Mass Air Flow sensor for volume air flow/performance. I have it somewhat narrowed down, but looking for a clue as to the correct direction to head in. It is throwing the code only when the truck is warmed up, not when cold.the check engine light came on so i check it with the scan tool and i got the P0101 code ---MAF or VAF a ckt rng peform--- any thoughts the car doesnt seem to be running any different 03-09-2009, 05:27 PM #2. 0rion. ... 06 duramax. check the pcv hose that comes out from under the front of your intake. Make sure it's not cracked somewhere.Chevy / GMC Duramax 07.5-10 LMM Forums. 07.5-10 LMM Performance Parts Discussion. 08 lmm annoying p0101 maf code. Tags lmm p0101. Jump to Latest Follow 4K ... I have the dreaded p0101 code and reduced engine power. I've had the maf replaced and the Iat sensor I have cleaned the filter but for the life of me can't get this code to stay away ...LBZ P0101 code driving me nuts. Jump to Latest Follow ... LBZ Duramax. Cold air intake, EGR blocker, Kory Willis PPEI 100HP, turbo resonator delete, 4" MBRP straight pipe turbo back, Edge CTS2 Insight 2006 Silverado 2500HD LT3 short bed crew cab, LBZ Duramax, 4x4 Bone stock.i have a 2002 gmc duramax lb7 setting dtc p0101 code at idle. engine is all stock. scan tool readings are as follows, engine speed 681,maf 5.3 hg, all elecricial consumers off. load 18.4,map 28.9 car is at sea level. coolant temp 172,iat 154 and outside air temp is 106. as soon as dtc is erased dtc will return within 102 sec. i replaced the maf ...After a google search on the P0641 code, I found a troubleshooting chart that says if the voltage at the throttle position sensor is lower than it should be, to disconnect the Fuel rail pressure sensor and check the voltage again. If that fixes the problem then it says to replace the fuel rail pressure sensor.So far replaced the MAF Sensor for the P0101 code but that still pops up way more than the P0401. I also had to replace the glow plugs to fix a P0380 code. ... I have 6 codes on my 6.6 duramax 2004 GMC 1-ton DTC P0101 "" P0234 "" P0380 "" Po621 U1152 U1024 engine emmits grey-black smoke excessively I had injector recall work done 29,000 miles ...Diagnostic trouble code (DTC) P0101 code stands for "Mass or Volume Air Flow 'A' Circuit Range/Performance.". This is logged by onboard diagnostics when the MAF sensor relays readings that are either irrational or out of range. P0101 belongs to a range of trouble codes (P0100 to P0104) that refer to a MAF circuit malfunction.2009 Duramax continues to reduce engine power and throw P0101 code after 2 new dealer replaced MAF sensors. ... I have 6 codes on my 6.6 duramax 2004 GMC 1-ton DTC P0101 "" P0234 "" P0380 "" Po621 U1152 U1024 engine emmits grey-black smoke excessively I had injector recall work done 29,000 miles ago ...Jul 13, 2019 · P0101. Usual cause is aftermarket air intake, altered or leak in your intake track also caused by EGR witch you deleted. The MAF at idle should be 40g/s but most trucks will vary 38-41. 2020 GMC Sierra SLT 3500 CC/SB L5P 3/14/20 Payload 3726lbs. AirLift LoadLifter 7500 XL.Got a p0101 and reduced power mode yesterday. Noticed the air filter cover was loose on one side. Remove it and put it back on so it was tight. Went to Napa and used their code reader to clear the code. Truck ran fine all the way home. This morning, made it 2 blocks before the truck went back into reduced power mode.Chevy / GMC Duramax 07.5-10 LMM Forums. 07.5-10 LMM Duramax Powertrain P0101 and P2457 on my new to me truck ... It was throwing the P2457 code "Exhaust Gas Re-circulation Cooler System Performance" and the P0101 code "Mass or Volume Air Flow A Circuit Range / Performance" I cleared them and later that day P0101 came back the next day I cleared ...LMM P0101 code. 2010 3500HD, stock except for tires. Pulled the cooling stack apart to clean the rad, as it was caked with dirt and causing the truck to overheat while towing. After reassembly the truck is throwing a P0101 code and going into limp mode. MAF was cleaned, and then replaced. Air filter is OEM and still clean.Constant p0101 and p0380 codes and crappy mileage! Jump to Latest Follow 4K views 6 replies 4 participants last post by f419sr1 Aug 3, 2010If it's less, then your probably choking the engines airflow, if it's over 45 then it's to much airflow both will cause the P0101. I'm …review DTC P0101, then inspect for any air leak condition as follows: 4.1. An air leak after the turbocharger. 4.2. An air leak before the turbocharger. 4.3. An air leak where the lower charge air cooler (CAC) air hose enters the CAC. 4.4. A leaking EGR valve, when it is commanded closed. 4.5. A leak in the positive crankcase ventilation (PCV ...P0101 is not neccesarily a maf code, it is a maf performance code meaning actual airflow does not match desired. Theres several things that can cause it ranging from boost leak, map sensor reading of making it think boost isn't what it actually is, altitude sensor in the ECM, an altered air intake that flows differently, even an aftermarket air filter can cause it.Mar 17, 2015 · Got a p0101 and reduced power mode yesterday. Noticed the air filter cover was loose on one side. Remove it and put it back on so it was tight. Went to Napa and used their code reader to clear the code. Truck ran fine all the way home. This morning, made it 2 blocks before the truck went back into reduced power mode.L5P Duramax P0101. Andrew Technician Indiana Posted Latest Edited . Case Study. Driveability. 2017 GMC Sierra 2500 HD SLE 6.6L (Y L5P) 6-spd (1000) ... So I cleared the code and the writer pulled the truck out of my bay. This whole ordeal took about 2 minutes. I want to stress, this happens at my dealership ALL the time. Nothing new, I have ...04titanse Discussion starter. 278 posts · Joined 2010. #1 · Mar 15, 2010. So i just did the EGR blocker plate and finger stick from kennedy diesel tonight, and on my test drive my exhaust disconnected down pipe from the front pipe. I was about 15 miles from home, and the P0103 code came up. I know its a MAF Mass Air Flow (MAF) Circuit High ...P0101 is not neccesarily a maf code, it is a maf performance code meaning actual airflow does not match desired. Theres several things that can cause it ranging from boost leak, map sensor reading of making it think boost isn't what it actually is, altitude sensor in the ECM, an altered air intake that flows differently, even an aftermarket air …The P0101 fault causes the PCM to trigger the malfunction light to notify the driver. Often, the lighting of an engine check light does not show a severe engine issue, nor an expensive fix, as motorists fear or see it. Indeed, …5 Jun 2021 ... ... codes. P0101 MAF Performance Code. How to replace a MAF Sensor. If your engine is running rich at idle, has hesitation or a rough idle, this ...Chevy / GMC Duramax 07.5-10 LMM Forums. 07.5-10 LMM Duramax Powertrain In the chase on a P0101. ... DTC P0101 Mass Air Flow (MAF) Sensor Performance ... Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References for scan tool informationIm getting codes P0700, U0073, P0101 & P0105. I replaced the TCM and that was not the problem, I replaced the ECM and that did nothing, I also replaced the MAF and that did nothing. The dealer said they cant find the problem. I have spent a lot of my own money on this problem to not find a fix. I have 250,000 miles on this truck and the ...Its an LBZ with 141,000 mile on it. Last week i tripped a p0102 and P0101 code on the bully dog and the truck had no boost. intake temp went through the roof and it belched black and white smoke. I pulled the tuner and took it to GM dealer who told me that it was the EGR valve that it was coked up and they replaced it. 972 dollars latter truck ...Jun 5, 2012 · The P0101 code has been set in just about every instance (probably 6 of 8 or 9) I believe the period of sitting immediately after towing is a key trigger for this failure. Basically a heat soak for the engine as the heat is trapped in the engine compartment with no air flow.Ron Nielson. 10722 posts · Joined 2009. #4 · Jan 15, 2019. If you search this website for that code, I'm pretty sure you will find some information that is helpful. Ron Nielson - Most of the information I provide relates directly to my 2008 LMM - Your truck may be a little (or a lot) different. 2008 Silverado LT, Crew Cab, 2WD,LB.The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the actual measured air flow from the MAF, MAP, and throttle position sensors is not within range of the calculated air flow that is derived from the system of models for greater than 2 s. P0101 GMC Code - Mass Air Flow Sensor Performance.. Open the hood after turning off the engi• P0101 • P0263 • P0266 • P0269 • P0272 • P0275 • P Chevy / GMC Duramax 07.5-10 LMM Forums. 07.5-10 LMM Duramax Powertrain. P0101. Jump to Latest Follow ... The P0101 code has been set in just about every instance (probably 6 of 8 or 9) I believe the period of sitting immediately after towing is a key trigger for this failure. Basically a heat soak for the engine as the heat is trapped in the ...Google Authenticator can now sync single-use two-factor authentication codes to Google Accounts, for added convenience. Google Authenticator just got an update that should make it ... CEL w p0101 code yesterday after towing my fifth wheel for 5 The P0101 code in Duramax means an error in the circuit of the Mass airflow sensor. This sensor measures the amount of air inlet to be mixed with fuel before entering the engine. It precisely indicates the malfunction of the air flow sensing sequence of the engine.Chevy / GMC Duramax 04.5-05 LLY Forum. 04.5-05 LLY Performance Parts Discussion P0101 code after maintenance and egr blocker ... air filter and installed an EGR blocker about 100 miles ago. I got a DTC code P0101 "Mass or Volume Air Flow Circuit Range/Performance" after about 50 miles and again today after 50 miles or so. … Just randomly checked my codes and I have a P0101...
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