2012 duramax reduced engine power I am pretty sure it is a ECM/TCM issue as I get the power back for another 4-5 miles if I clear all the TDCs even though I do not show any saved or pending codes, I tried to "wait it out" for several miles but I would only get the power back after clearing the TDCs, in fact if I 2. The first is a bad air filter; the second is a bad fuel filter; the third is something is wrong with the gas pedal My MAP sensor would get oil on it and throw a code and reduced engine power. The times with no code its been 40-50. Started it this morning and drove for about 30 seconds before it lost power and sounds unbalanced/missing. 5 Duramax LLY chevy dually ZF-6 CC/DRW/Flatbed White- 4 inch downpipe back with 6''X2' Tip, S&B Stage 2 Intake, 2012 chevy silverado 3500 srw LML 4x4 LTZ. 00lb-min then about 5 min later pressure Engine power reduced. 2015 LML Duramax, check engine light is on and will find a Chevy / GMC Duramax 06-07 LBZ & LLY Forums. 2007. Fabtech steering stabalizer. Reduced engine power lights can pop up for various reasons. Jump to Latest We have power train and engine warranty till December of this year. Truck runs smooth just reduced engine power. 2017-19 GM T-K2 Platform Powertrain. 2008 2500hd duramax-5% tint all around-22x10 Recon SS American Force wrappend The "engine power reduced" message went away immediately after pulling the K&N. One of the wires was broken. Replace them and add a lift pump bc you have already damaged the cp3 pumps ability to draw fuel from the tank with the existing P2463 P0420 Reduced engine power. On the scanner the ICP doesn't go above 17kpsi really. Figured the truck was in limp mode, so I pulled over to clear the codes like I'd do in my 06 LBZ. 2012 3500hd srw 4 wd Jamco exhaust Kennedy dual we have a 2008 duramax dually flat bed 4x4 we bought with 50k about 2 years ago, we installed a 62 gallon tank about a year ago and have started having problems, it tows 99% of the time a 20k lbs gooseneck not so aero dynamic trailer, we started getting the reduced engine power change fuel filter problems and we went through all the fuel lines making sure 2006 GMC LBZ CCSB Allison 6-Speed with Alligator Performances Stage V Kit and a Precision (ML) TC w/Deep Pan, 16x8. 2005 Crew/mostly stock Exhaust and fingerstick only new fuel filter just a Worked great for about a week, now the reduced engine power is back comes back every time I clear it but throws no check engine light but has code PO102 for MAF sensor low voltage I was watching the MAF live data while it happened and when I got the reduced engine power the MAF live data dropped to 0. Advanced Search 6. Traced it to bad stop lamp switch. I bought a 2010 Ram 3500 CTD for $62,000 CDN funds, had issues with it from day 1, never bitched to anyone about the troubles, just looked straight ahead Need some help here on my2011 duramax. It does not limit top speed( I read that it should not go over 50-55). Chevy / GMC Duramax 2017+ L5P Forums. Air filter is clean. If I push the throttle, it is very unresponsive, but will go up gradually, but not all the way. It seems like a fuel delivery issue though. Most of the time, reduced engine power doesn’t make commuting home possible since the max speed your Chevy Express will reach is not going to be enough to keep you safe on the highway. Jump to Latest 14K views 12 replies 6 participants last post by Roadracer760 Jun 20, 2019. Sep 26, 2017 Duramaxdiesels. This came across the dash reduced engine power the other day let it sit for a few hrs and truck drove for about 10 minutes then it came back when it happens there is no throttle response at all it just sets at idle I swapped out the pedal assembly and throttle position sensor changed fuel filter has a new air filter and other than that it's a stock truck only codes I have My truck is a 2008 Silverado (Duramax 6. com tow tune w/turbo brake PPE Dual Fueler (P0087 cure) Kitty on a "warm shelf", K+N Drop-in filter Having a couple issues with my 2013 Duramax 75,000 miles Show reduced power on the instrument panel and it feels down on power, maybe 75% of normal. 5-10 LMM Forums. the reduce engine power would come on when pulling a heavy load, now it come on all the time. Your reading on the Edge is in lbs/in2. 3. 2004. $109 later I was back on the road. The after a little bit, the code goes away and it seems to run fine. 5-2005 533 posts · Joined 2012 Add to quote; Only show this user when I shut it off it was on reduced engine power nxt time I started it. ADMIN MOD 2012 LML Deleted Reduced Engine power, no codes. 5 MB V-drive wheels with 285/75/16 Hancook Dynapro ATM's, 4" Diamond-Eye Turbo Back Dual Exhaust, 3" Diamond Eye Down-pipe, Raptor 150, My Own PCV Reroute, Fuel Shim Kit, Ported Fuel Rail Fitting (drilled out the stock one to Ok so now grams are at 60 and the P2463 code set and Reduced Engine Power has set. Then the next day got a another def light came on with message 99 miles until 65mph reduced power. It didn't want to go over 2,000 rpm. If you have a Duramax diesel engine, there are many issues that make the Reduced Engine Power warning sign illuminate. Otherwise it's stock and been running great. All the fluids are fresh, the MAF sensor has been cleaned, the air filter is new, and the fuel filter is new. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and I was going down hill on i80 East into Reno in my 2017 3500HD 6. The cost of fixing reduced engine power depends on the vehicle model and problem type. of relativity trouble free driving I am experiencing a loss of power with no shown codes. So here is my situation i have a 07 classic duramax lbz. I have an 06 with LBZ that keeps kicking out the reduced engine power message but only in the colder months never had the problem in warmer months, I have changed faulty pedal, cleaned MAF I have a 2009 GMC Sierra 2500 HD. Custom Design Decals, EFI Live Spade Tuner w/ EFI Live DSP 5 Switch from DuramaxTuner. . 2012 LML Duramax LTZ Crewcab. Members Online • FoxxxiiBabe. 6 Duramax Diesel K&N Full Intake/ Quadzilla Stealth 2 Tunner. Jump to Latest #13 · Jul 9, 2012 (Edited) Your fuel lines crossing over next to the tranny are Probally collapseing along with the 2 coming and going from the fuel filter head. The engine light stays on until the truck is shut off a couple of times and goes away. When I first put the plate in and tunned it with the EGR enabled I drove 35-40 miles no problem, then I got engine power reduced again. Nov 30, 2016 #3 I dropped to 18% fuel filter life remaining and began to get the "Reduced Engine Power" prompt and dropping from 70mph to about 50mph on the interstate. 11-16 LML Duramax Powertrain. Today each time i start up vehicle it prompts "Engine Power is Reduced" It feel like it has a governer on it and will just crawl up to about 40 mph. 5-10 LMM Duramax Powertrain Low power no codes. '09 GMC 2500 Crew Cab Shortbed 6. 5 Engine power Reduced with check engine light I’m a 2008 Chevy duramax owner and have had the reduced engine warning also, once in winter and once just shortly ago pulling my 35 foot camper home,hot day around 95. Diesel particulate filter (DPF) regeneration is inhibited. LBZ: 2012 (Edited) Check codes. Any engine fuel or airflow problem may cause the light to pop up on the dashboard. Optilube. Tags duramax lml reduced engine power. My test drive it had 2mi on it. Check engine light came back but did not really lose anything except acceleration was slow. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! "Engine Power is Reduced" Dash CEL illuminates , and NO CODES with Banks IDash. I was driving to work today and the engine light came on and i got a a Reduced Engine power message came on my Dashboard. It says reduced engine power, has no codes, no check engine light, and no tach. One of the most annoying things that can happen when we are driving our vehicles is when we get the reduced engine power light. You’ll likely notice reduced engine power, and the process to reset this The truck goes into "reduced engine power" at random times and there is no code. CrazySilverado Discussion starter. 5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) 2009 GMC Sierra 2500HD SLE CC/SB 4x4 LMM EFI Live, Edge Insight CTS, Flo~Pro 4" DP back exhaust w/ muffler & stock trumpet tip, Alum. Jump to Latest We have since replaced both the Map and Maf sensor and it still will not come out of reduced power. Problems with the transmission, fuel line system, or engine can cause the proble There are three common parts that produce this code or message. P2463 P0420 Reduced engine power Thread starter Trotorx2; Start date Oct 19, 2016; Forums. 1/2 way home last night the truck started dinging & the dash says "reduced engine power". toohott7718 said: D_R_C Does your code scanner erase the Reduced engine power message? or do I'm currently having the exact same problem. I remember it had something to do with the DEF tank and it got replaced. 6 LMM banks Intake and super scoop 2008 GMC Sierra Duramax - Reduced Engine Power Thread starter jcsabolt2; Start date Nov 29, 2016; 2012 3,582 562 113 Central OH. drw. Had it a few days and was doing fine. 2003 2500HD 2009 2500HD 2015 2500HD. Here’s Reduced engine power means the engine is not providing as much power as it normally would. 5-10 LMM Duramax Powertrain Engine Power Reduced. Displays "Reduced engine power" and won't go over 40 mph. In this article, we will discuss the causes of Duramax reduced engine power reset and provide solutions to fix this issue. When first start up and goes into high idle it kicks off for a second or two and back to high idle. it has come on before but usually turns off when i turn the truck off and let it sit for minute and turn it back on. Yes, many times I have replaced filter. This isn’t a very satisfying answer, but it’s the honest one! Some causes are more common than others, At random times the "Reduced Engine Power" message will display with no CEL and no codes (I carry a foseal reader with me). If your Express has gotten this reduced engine 9 posts · Joined 2012 Add to quote; Only show this user would go but now sometimes i am getting it doing 60mph/ 100km/h i am not to sure why and after the the truck shoots the engine power reduced code it says to change my fuel filter which was change 1000km ago 08 Chevy Duramax 6. With my Bully dog PMT I go into diagnostics to check codes, it says none present but the truck has a check engine light on. Once it get a few RPM's built up it will run fine as long as the RPM's don't go below 1500-1700. Starting out cold (not really, it has been 90-100 degrees here lately) has been when it mostly started. Question how many miles can I go until I'm on limp mode? Going to try and take Now, reduced engine power can come from several problems, this is not a fault code, just a message to operater, in order for anyone to help you here we need at least a fault code description. I picked up my 30 ft travel trailer today (maybe 55 degrees outside) and went about a half mile at low speed when "Reduced Engine Power" came on and shortly after the truck shut off and wouldn't start. Any ideas? If it does need a regen, how in the world do you do a manual regen? Hey guys, maybe one of you can helpit's been a heck of a day. Now using GM filters. No hauling no towing. This safe mode, often called limp mode, is designed You are assuming the engine power reduced message is dpf related when it very possibly is not. B&W gooseneck. The truck has 70k mileage . Typically, it costs between $40 and 2015 Duramax reduced power. We now mention the first and by far the most common reason of reduced engine power of your vehicle: Diesel Engines Performance Problem. Currently 348mi on it. 6 Technical. Jump to Latest 9K I get an indication of "engine power reduced". We strive to keep this the #1 forum for tech and Reduced engine power can be caused by a long list of issues. I have a reduced engine power warning on the dash but no codes stored in any module. Book says nothing except "see dealer". There is no smoke, oil is clean. the Reduced Engine Power message would disappear sometimes and the Engine Cleaning Exhaust System Must Continue Driving would come up, as if both messages are connected with what’s Keep having a change fuel filter message and it drops from 100% to 0% then a few minutes later a reduced engine power message comes on and even sometimes after I cut my truck off and back on the message comes on about 1/2 mile down the road. 2012 Silverado 3500 dually, 6. 2012 Chevrolet 3500 CCLB SRW 4x4-sold Your Duramax Diesel-Only Shopping Resource Replaced the 08 2500 HD-recently had the (engine power reduced) and this is the first time this has ever happened to my truck. 2011-2012 GMC Savana, Sierra Equipped with Duramax Diesel Engine RPO LGH or LML Condition/Concern Some customers may comment that the malfunction indicator lamp (MIL) is illuminated and the Reduced Engine Power message is displayed. 28 posts · Joined 2018 Add to I have a 2011 GMC Sierra 2500 SLT, with the 6. 2019 Denali "Engine Power is Reduced" NO EFI Live/Digital Dsp5 swtich/4" MBRP Exhaust/ Black 4"-5" Rolled angle tip/ Factory Match Boost and Pyro guages/ 2" Leveling Kit/ Tinted Black Red Tail Lights with Tinted 3rd Brake light/ Clear Head lights/ Tinted front windows/ Paint Front and Rear bumpers White/ powder coat black running boards/ 20x9" Bmf Novakanes/33" or 285 Toyo Open Country M/T Hello, I have a 2008 GMC Sierra 2500HD Duramax Diesel with about 55,000 miles on it. I can drive without problem and sometimes in the morning the problem manifests itself. Min spec is 16ml and they are usually 15 to 18 when p0420 and I suspect that injector is bad. Got a 07 NNBS Duramax that has a built trans (now) and recently got a new tune (trans left "stock" programming) but engine is +270. Pretty I have a 2012 I got a recent check engine light which was scanned as a nox sensor issue. I stopped truck, turned My LBZ was going into reduced engine power mode without throwing codes. jpg. Replaced the switch and cruise worked fine again. Upon inspection, the technician may observe on a scan tool one or more of the following DTCs set in the engine When I am driving on the freeway, the truck occasionally loses power and displays a reduced engine power message and the check engine light. Was able to drive home with the cruise set at 100km/hr. Clear the REP warning and it would come back on within about 1-2 km. I was pulling my 3 car trailer loaded with 3 units on it. Amsoil fluids bumper to bumper. 07. Always Getting Reduced engine power. Pressed brake pedal and hit brake button, up pops “engine power reduced” screen and truck is in limp mode which has never happened to me. Advanced Search Joined Apr 12, 2012 Just picked up a 2021 1500. If I go very light on the throttle I might go along for a hundred miles before this fuel starvation problem comes up with a "replace the fuel filter" message, then "reduced power. 5-2005 (LLY) 6. I was towing my horse so I didn't want to take any more chance and stopped at the dealer in Eastman. I pulled the MAF sensor and found the remnants of a bug across the single outer wire and case. hauto | Work on all makes and modles, in my own shop 15 years hands on experince 2,194 Satisfied Customers Went to truck and started with key, with engine light on and message that says reduced engine power. My DIC is reading reduced engine power sporadically, it only occurs when braking to a stop. When it kicks off the engine reduce power comes on then goes away as it continues to idle up again. bleeder screw, WIF sensor delete plug, Fumoto oil drain valve, Pacer LED cab lights, GM dually light bar under tailgate, Footwell lights, Cobra 29 WXNWST CB radio, Wilson 2000 CB antenna, Kenwood speakers, HD 03 6. "My 2008 duramax drops to low power mode any time I pull a trailer. Mods: deleted with H&s mini max. 2L Diesel Engine Duramax When I arrived I got the message Reduced Engine Power and code P244A (I always have my scanner with me) - It registered as a permanent code but was able to clear the check engine light. Each time the fuel filter gauge says 0% life, I limped into town at 30 miles an Had a boost solenoid code ordered a kit with that and turbo vane sensor. 2012 (Edited) Only show this user. 15 Duramax Reduced Power. I replace the brake pedal switch with no change. 6 Duramax 4x4-Black-Edge Evolution Programmer-285 Goodyear Duratracs-Tinted Windows, Cab Lights A message center or an indicator may display reduced engine power. 4" MBRP Turbo Back with full DPF and EGR Delete complete with EGR blocker plate and PCV Reroute. After 750 mi. At that time I got a p0546, p0401, and p2033 I think. Thankfully, he didn’t have to get up to speed to get home. I used the FAQ section and did what was suggested, new fuel filter, check air filter etc. Reduced Power engine mode I have a 2016 Chevy Colorado 2. Turbo sounds different when spoiling. 6 posts · Joined 2012 Add to quote; Only show this user The reduced engine power warning typically (90%) comes on the DIC as well, but this is not always true. Amazon. LMM been driving fine. anyways i made it home and left it parked for the night, went out to start it this morning and it still says the same I have a 2008 lmm. 0l, crew cab, long box replaced w flatbed. also you may also be getting hot fuel also when the P2138 code "reduced engine power" 4201 posts · Joined 2012 Add to quote; Only show this user #2 · Jul 8 A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. 23. Bone stock for now. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Try pulling your MAP (not to be confused with MAF) sensor and cleaning it with electronic parts or sensor To do a Duramax engine power reset: turn off the ignition and wait 5 seconds, then hold down the ‘trip odometer’ reset button and turn the ignition on, keep holding the odometer button until the change engine oil message is displayed, You can fix the Duramax reduced engine power message in two ways: disconnecting and reconnecting the battery and fixing or replacing the faulty components after When your Duramax truck goes into limp mode, it’s designed to protect your engine from damage. 9 when this happens Joined Jul 3, 2012 · 16 Posts #103 2007. The truck idles fine with no weird noises at all. 4'' straight pipe,airdog165, edge cts for gauges, Leveled with shackles and cranked t-bars, wheels/tires: 20'' fuel 1672 posts · Joined 2012 Add to quote; Only show this user #5 THE TRUCK-White 2010 LT LMM CCSB w/ Ebony and 40/20/40 split bench. Seen it plenty of times for a p0420. 6LMM 4x4 CC SB. 6. After a mile or so the message usually goes away and the truck returns to full power. 6" Procomp lift plus air bags Mickey Thompson 305/70/R18; twin spares. I have a 2013 3500 and the last trip I took it on I got a reduced engine power message on the dash but no DTCs. was cruising aroung the mountain last night when the reduced engine power came on. Says to replace fuel filter. TUFF bullbar. When your Duramax displays a reduced engine power warning, it’s indicating there’s a significant fault within the system. It will idle and rev up but has no power. It keeps getting a "reduced engine power" message on the dash, then it in this thread in this sub-forum in the entire site. 864 posts · Joined 2012 Add to quote; Only show this user several different issues can and will cause "Reduced Engine Power" one I the only time i got that message with the 06 1 ton i drive, was when it was in limp mode pulling a wedge trailer, climbing mountains, and ended up with 9 codes. 7 KB Views: 739. Replaced everything was fine. 2011 denali duramax. 5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004. BTW. 5 chevy silverado, Just had my 2009 GMC Sierra 2500HD Duramax serviced with new fuel filter and Air Filter yesterday. r/Duramax. Went hunting, all of sudden the change filter and reduced engine power indicators came on. RED LBZ Spray-In Bed Liner, Air Bags Custom Reese 20K slider FWH/Gooseneck hitch 265/75/16 Michelin LTX AT2's on PYO's Duramax. Edge Evo Race CS, MBRP 4'' Turboback, DiamondEye Downpipe, SDP EGR delete , AFE Stg. Finally got around to scanning and it showed MAP sensor and 7 glow plugs. Hey all, stuck at work. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! Customer: 2012 duramax in reduced engine power, I cleaned throttle body,and map and maf . Diagnostic said exhaust heat sensor, would that cause it?? Mechanic's Assistant: How long has this been going on with the sensor? Customer: Idk Mechanic's Assistant: What's the year and model of your truck? Customer: 2012 ltz duramax 606 posts · Joined 2012 So pulling out of Walmart I was heading home hit 60 then boom engine power reduced and couldn't accelerate and had no power what so ever? Anybody had the same problem? I have an edge evo racing tuner Sent from my Autoguide iPhone app . Contacted tuning company and no change after multiple tunes. Conditions for Clearing the DTC DTC P0299 is a Type A How Much Does It Cost to Fix Reduced Engine Power in GMC. There are various factors related to Duramax-powered cars that mention Engine Reduced 03 lb7 with 130,000 miles, installed AirDog 30 days ago, straight pipe exhaust. Whether you are a new or 2017 Silverado LTZ CC Duramax 2500 Reduced Engine Power. Any advice would be greatly appreciated . Duramax 6. HELP. if anyone can help I would greatly appreciate it, thanks Now the CEL is coming on and going into "Reduced Engine Power" intermittently. Full delete. I’ve had this truck almost 2 years now with no problems other than changing a fuel filter. 2008 Duramax LMM SLT ~ 93K miles Leveling kit, 285/70 R17 Quadzilla DPF Delete - 50 HP tune K&N air filter . Save Share 08 Duramax- ENGINE POWER REDUCED. It happened twice the same day. I noticed that the problem happens when I leave in the morning, after 2 or 3 km the problem The truck goes into "reduced engine power" at random times and there is no code. Checked pages of lmm powertrain, didnt find what I was looking for. 5v down to 12. 6. com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. 3, I had the reduced power and it was the connector to the throttle body that has about 6 wires of different colors. 0 2500hd: Reduced engine power, at my wits end. Then shortly after I get the engine power reduced. 5 Chevrolet 2500 HD 6. the solinoids on the injectors are sticking allowing the fuel to bypass to the tank causing low fuel rail pressure. Jump to Latest Joined Dec 16, 2012 A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. II Dry Flow, AirdogII 150, Cat filter Mod, Deleted Resonator, Pcv reroute What gets me is that I have no check engine light whatsoever. When you push the pedal all the way it is effectively the same as half throttle. Go to Duramax r/Duramax. Now it still comes up reduced engine power after driving 15 km or so. CSM canopy. 2012 3500 cc. Limped it back about 30 miles, changed filter and still have those indicators on dash, no power. I have a 2017 Duramax, 60k miles, Banks Derringer, and an Airaid CAI. This message will clear if I turn the truck off for a while and let it sit. 5-10 LMM Duramax Powertrain Reduced Engine Power 2012 Suzuki V-Strom DL1000 DD 2007. com has the best price on them. Glow Shift White 7 Color Series gauges in "A" pillar 3 pod stack with Boost, Exhaust DPF is removed- Now getting "engine power is reduced" warning. 6 diesel LMM. But no check engine light Also the lights dim every 5 seconds or so when at idle, the voltage goes from 14. When it occurs this is what happens- under 1500 RPM's it is like the fuel pedal does not work. 2012 71 0 6 Fairbanks, Alaska. The dealer will scan for the code and do a The first thing you can do to fix the Reduced Engine Power warning message in Duramax vehicles, such as Chevy Silverado and GMC Sierra, is reset the ECU. The ECM commands reduced engine power. Sat more then 24hrs without start and now I have check engine light and "engine power reduced". Started it up to go down to the park a couple blocks away and when started back up to drive back home, the note “engine power is reduced”came on my instrument panel. Chevy / GMC Duramax 07. 489 posts · Joined 2012 Add to quote; Only show this user 2006 Chevrolet 2500HD Duramax CCSB LT3 - MBRP Downpipe, MBRP 4" exhaust, Edge CTS and Pyro, Leveled Tow Mirrors, WeatherTechs, B&W Turnover Ball, Curt Class V, Prodigy P2, De-badged, De-molded, Cooper ATP's on Fuel Mavs Reduced engine power came on, I read the code, 2011 Duramax reduced engine power. If I click the key off and back on it resets the message and I have full power. If you have warranty - use it. I clean the MAF once more and been good today so far after about 50 miles driven so far. Amsoil bypass. Lb. AGAIN!!!! Jump to Latest In the last couple weeks the truck has started to give me a engine power reduced in this thread in this sub-forum in the entire site. Having reduced engine power problems Had it to the dealer quite a few times they tell me that my DPF is plugged they regenerate a couple of times but it keeps going back to limp mode so I pulled the exhaust front to back and deleted it. It has gone into reduced power right after replacing the filter. 2011 gmc 2500 LML tuned and deleted. 6) For the past few days my truck has had a loss of power and indicates (reduced engine power) The problem is intermittent. turned out the injectors were bad. I removed and cleaned, my mass air flow sensor, and am at a loss as to Chevy / GMC Duramax 11-16 LML Forums. I had the fuel filter changed out by a Chevy / GMC Duramax 07. Display reads "Reduced engine power" and will not rev up at all! I have the battery disconnected now, but did it earlier for about 5 minutes with no change. If this dealer can't figure this out they shouldn't be touching a duramax. Attachments. The reduced engine power went away but the check engine light stayed on. 2008 Duramax, towing a triple axle trailer with a 33' boat on it, total GVW is 21,800 lbs. I don't have a code reader, but thought it might be due to a needed regen. My cruise would work sometimes and not sometimes. " Joined Jun 27, 2012 When the programmer was on the truck it would never let me clear the code for the reduced engine power. C. I have a 08 duramax ,5"rexhaust cai . 6L Duramax Diesel High Country DRW. It doesn't throw any codes, I've taken it to a few mechanics they both cannot find any reason. 2008 Silverado 3500 HD LT 6. 3E448A4C-2824-42C7-BEAA-5721A87A49F7_1563053594122. 06-07 LBZ & LLY Duramax Powertrain Reduced engine power Hello folks new here and hoping someone can help. the truck runs ok and it doesent shut off except it shows "engine power reduced" and it is powerless, as soon as I connect the plug again the truck shutters and shuts off. 8 duramax diesel, it has 23,000 miles. Jump to Latest 35K It was negatives when it actually flashed a code and went into reduced engine power. The BARO should not change with engine load or speed at the same time and place. On my 03 1500 5. Anyway, before I dropped in the new tune to the DSP5, even on the 150 tune the truck will display "reduced engine power" with no codes. 2012 Denali, Ranch Hand Front Bumper, OEM Side What does reduced engine power mean on a chevy truck 2006 with the Duramax diesel in it. Deleted truck with EFI live tuning. 5 Chevy Silverado 2500HD 6. I’ve had reduced engine power along with a check engine light but the trucks been fairly responsive to the pedal and I have only been daily commuting. It is deleted and has a 5 position Moonshines tuner and 4" exhaust. reduced engine power. The MAP sensor reads the pressure inside your intake system and that will vary with atmospheric pressure and the boost provided by the turbo. FASS 150 lift pump 2008 LMM CC/LB EFI LIVE FROM DURAMAX TUNER WITH FOUR INCH MBRP INSTALLED BY MAULS SHOP. Check fuel filter. I have since put in an EGR block off plate, tried it with the EGR on and off, and I'm still getting reduced engine power.
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