Peterbilt 389 emissions derate - For Sale 2020 Kenworth T880 Automatic Dump Truck 170,000 X15 Cummins - 280,000 miles - Eaton 18speed Ultra shift Plus Automatic Transmission with Hill Start Aid features.

 
Page 4. . Peterbilt 389 emissions derate

Ive seen 3 trucks that had the batteries replaced and the terminal was left off. Features Peterbilt 389 Glider - independent truck model. PACCAR Davie 4 Is The Latest Dealer Diagnostics Software For All Paccar Engines - DAF , Peterbilt & Kenworth Model MX-13 1015, Fuel injectors Paccar MX-13 PN 1825900 Tag 2038821 Part Info (360)736-3344 Request Info 1015, Fuel injectors Paccar MX-13 PN 1825900 Tag 2038821 Part Info (360)736-3344 Request Info. 5 25 Torque Derate 0 40 Torque Derate (ramped in at 1 per minute) 0 Vehicle Speed Limited to 55 mph (pumping is still enabled) 0 None 0 And after the engine has been intentionally shut down or in the idle position for 1 hour 40 Torque Derate & Vehicle Speed Limited to 5 mph has been intentionally 0 And after the engine shut down. Then it started at 50 km into the trip Id get emissions codes with warnings of an engine derate. We were the first who started doing. I drove a bit further and made it to Rifle without the engine derating further and parked it because I wasn&39;t looking forward to driving at 5 MPH on those narrow shoulders on I-70. Posted September 15, 2015. Also unplug the Turbo actuator connections and recheck. - High quality mirrors reflection. 5 25 Torque Derate 0 40 Torque Derate (ramped in at 1 per minute) 0 Vehicle Speed Limited to 55 mph (pumping is still enabled) 0 None 0 And after the engine has been intentionally shut down or in the idle position for 1 hour 40 Torque Derate & Vehicle Speed Limited to 5 mph has been intentionally 0 And after the engine shut down. Page 4 of 4. The service allows to compare and analyze statistics for reported problems, complaints, recalls for various manufacturers. DEF Pump Assembly This is the heart of the DEF system that pumps the DEF fluid trough the emission system. I drove em a few times, doesnt pull thanks to automatic 65 at 1200 rpm and slow throttle reaction when shifts down to 9th. DEF Pump Assembly This is the heart of the DEF system that pumps the DEF fluid trough the emission system. The 389 is only an upgrade and more advanced. Also unplug the Turbo actuator connections and recheck. I&x27;ve seen bad solenoids straight out of the box, if it remains stuck out when you turn the ignition on, check your wiring and repair as needed. Peterbilt cant get to it until 1022. Peterbilt. 15 Jul 2017. they been in shop so many times for derate. 2019 peterbilt 389 565 cummings. 0102-03 - boost pressure sensor voltage high. 2017 Peterbilt 389 Fuel Tank. Sold By BABA Logistics LLC. Peterbilt Tail Lights Brackets Mounting Bracket and Harness P92-9425-003. 2022 Peterbilt 389 With Stop Engine Light. what jobs can you get with a finance degree. Jun 7, 2007 I drove a bit further and made it to Rifle without the engine derating further and parked it because I wasn&39;t looking forward to driving at 5 MPH on those narrow shoulders on I-70. Updated wrecker and lots of fixes. Immediate derate is a result of failure. Free shipping. 2022 520 Battery Electric Vehicle Body Builder Manual Supplement. The Peterbilt 389 model is designed for a powerful engine for maximum power and weight benefits, resulting in optimal fuel efficiency. - High quality detailed interior. Along with that we can modify fuel & other powerfuel economy related settings. For use with Peterbilt 389 v1. Make sure engine is fully warmed up (180) Connect OTR reset tool to 9-Pin connection under the dash; Wait 15 Seconds (EPA10. 2022 520 Battery Electric Vehicle Body Builder Manual Supplement. Simple, Dealer level tool to reset fault codes and your emission system. About Peterbilt Engine Derate. (Support) PETERBILT PDI BIG BOSS PERFORMANCE TUNER INTAKE KIT CUMMINS ISX X15 CM2350. and get some mileage numbers. 0102-01 - low boost pressure. 0102-03 - boost pressure sensor voltage high. 5 Rear tandem tires 11R22. - High quality detailed exterior. DEF Doser Valve It is the component that is regulating the injection of the DEF fluid into your SCR Catalyst. This EGR valve is designed to match the fit and function of the original valve on specified vehicles. The driver display says 25 torque derate in. Peterbilt 388 389 Interior Chrome Trims. Said it showed 2 sensor problems. Connected TruckTech. hw mx. So, all I can say from personal experience, is at least another 30 minutes to an hour. put out 630hp to the crank. Otherwise Your engine will be stuck in derate mode, and it will not be usable. Search Peterbilt Check Engine Light Codes. I'm new to all this new emission system BS, but thanks to CA I had to get rid of my older, perfect running trucks, and put myself in debt on a newer one. However the one code covers no less than five different faults, as follows-. Peterbilt 389 emissions derate. Sep 14, 2015 Posted September 15, 2015. It provides weekly reports with price assessments for Europe and North America, actionable insights on key market developments, real-time news and fundamentals analysis on supply, demand, and trade for Europe, North America, India and Brazil. 2018 piterbilt 389 with x15 Discussion in &39;Peterbilt Forum&39; started by joetrucker66, Jun 1, 2017. This CNG platform joins Peterbilt&x27;s family of alternative fuel vehicles, forming the industry&x27;s most comprehensive environmentally responsible lineup. Bulletin Summary Information only - davie4 tests replace drive cycle tests for emy2016 and emy2019 and newer paccar mx-13 and mx-11 engines. I have a 2016 KW T880 with 93k miles on ISX15 450hp I just got this message yesterday and it's got me all panicked. Truck Diesel Emission Fluid Level Smart TelTek Gauge These Smart Gauges replace current factory Smart Gauges. Our vast selection is ready to be sent out today; place your order now WARNING If the Stop Engine warning lamp illumi- Applies to Engine Models QSB T2, QSC T2, QSL T2. Then it started at 50 km into the trip Id get emissions codes with warnings of an engine derate. You will forget about 5MPH derate Paccar ONLINE ECM tuning. what jobs can you get with a finance degree. they been in shop so many times for derate. It&x27;s important to remember that the "run. Perform parked regeneration. 2021-1-10 &183; Get Free Peterbilt Engine Codes Peterbilt Engine Codes When people should go to the ebook stores, search The engine is derated and I have the following codes. 2013 peterbilt 388 12k front 46k rear 410 ratio 18 speed eaton fuller 500 hp 1850 ft torque Cummins With. I&39;m new to all this new emission system BS, but thanks to CA I had to get rid of my older, perfect running trucks, and put myself in debt on . The dreaded fault code that causes the 5 MPH derate This fault is related to the "SCR Inducement" which is what regulates your truck to this derate. Seek service at the next stop if the warning light is still on. Benefits with DPF Delete. Perform stationary regeneration. These issues include safety recalls for your Peterbilt 389 and complaints other owners have filed. There is just too many reasons why these engine derate nowadays to guess what your issue may be. Search Peterbilt Diagnostic Codes. 2008 peterbilt cummins isx engine amber check engine light My Check Engine light came on (solid yellow) Our vast selection is ready to be sent out today; place your order now. The Peterbilt 389 model is designed for a powerful engine for maximum power and weight benefits, resulting in optimal fuel efficiency. The electrical panel on Peterbilt trucks is located in the front cab of the truck on the passenger or driver&x27;s side, depending on the truck model. 13, 2010, to April 20, 2015 Peterbilt Motors Company is an American truck manufacturer Car Engine Diagnostic Test Resistance Values for both networks should be 60ohms - 3ohms Checking Voltages J1939H1939 3714 - Engine Protection Torque Derate- Condition Exists 3714 - Engine Protection Torque Derate- Condition Exists. PDI Big Boss Products for Cummins X15 engines are built to improve fuel mileage, increase horsepower, and deliver more torque. Add DEF fluid (more than 14 tank). Peterbilt 379 389 Cab Panels with 12 Round LED Lights. deputizing against the damages associated with diesel engines and DPFs ensures there will be no problem. Mechanic&39;s Assistant Sometimes things that you think will be really complicated end up being easy to fix. Make sure engine is fully warmed up (180) Connect OTR reset tool to 9-Pin connection under the dash; Wait 15 Seconds (EPA10. Conserve Fuel with Routine Truck and Fleet Maintenance. Aluminum Rear Half Fenders. all is well 2018. - High quality detailed exterior. 75 Inch One Piece Cab And Cowl Panels With 2117 LED Bullet Lights And 6 Inch Spacing. Peterbilt 389 emissions derate Ecm Performance offers custom Engine Control Module (ECM) programming & diagnostic support for Cummins ISB 6. Page 4. Page 4. - High quality detailed interior. Perform parked regeneration. Peterbilt Cummins Check Engine Light Codes engine, light, codes Created Date 11132020 40053 AM Peterbilt Cummins Check Engine Light Codes The Peterbilt Truck diagnostic scanner enables you to read and erase the fault codes that relate to the check engine light on your truck P0025 "B" Camshaft Position - Timing Over-Retarded (Bank 2) - See. You could even pull the electronic control module. Pilot Engines 5130 Main Street NE Minneapolis, MN 55421 (877) 599-4806. The classic look of this truck is unmistakable and the performance with pre-emission technology under the hood is unmatched. Paccar Engine 5mph Derate Peterbilt and Kenworth Paccar Engine 5mph Derate Peterbilt and Kenworth by OTR. 00 2010 Peterbilt 389 Grille. Peterbilt Check Engine Light Codes peterbilt-check-engine-light-codes 15 Page 331. Aug 3, 2019 If the unit is coming up with a derate message that means that you have an issue with scr system or its inability to treat the exhaust. Truck was parked off for 4 days, first showing code out of nowhere was the SPN 641 read more. If the unit is coming up with a derate message that means that you have an issue with scr system or its inability to treat the exhaust. ibew 573 job line. Got a 2018 Peterbilt 389 with the X15 Efficiency showing code 3464 fmi 3 and fmi 7. Alert for new Listings. Got a 2018 Peterbilt 389 with the X15 Efficiency showing code 3464 fmi 3 and fmi 7. Page 4. Joined Aug 3, 2011. Loaded Interior. 2019 Peterbilt 389. It starts to count down, but never goes 3 hours until it clears itself. Peterbilt 388 389 Seat Covers. (Support) PETERBILT PDI BIG BOSS PERFORMANCE TUNER INTAKE KIT CUMMINS ISX X15 CM2350. Yes as a matter of fact because i been a truck driver the last 5 years, I can tell you that Loves in places such as Midland TX has history with low quality def, and can cause trucks to trigger "engine derate" messages in peterbilt 579&x27;s with cummins, and "poor quality def" alerts in Peterbilt 389&x27;s with paccar engines. ballistic gel dummy with bones. Simple, Dealer level tool to reset fault codes and your emission system. Then it started at 50 km into the trip Id get emissions codes with warnings of an engine derate. For 2012-2016 Peterbilt 389 Exhaust Temperature Sensor Dorman 82753PG 2013 2014 (Fits Peterbilt 389) 120. 67 rear end), they been in shop so many times for derate. this a real channel where I show the good and bad and don&39;t hide anything, tell it how it is and I don&39;t really care if you dislike a carb compliant truck or. For those of you with a newer emissions truck, here is some technical . Easy plug-in design, plugs into existing headlight wiring harness. 2019 PETERBILT389Day Cab Truck Tractor (TA) Meter Reads 191,314 Mi Details Paccar MX13 12. Squeezing as much efficiency as we can from parts that came from the factory. Aluminum Headache Rack. Information provided by the National Highway. 2016 FREIGHTLINER CASCADIA 125. Reset your system quickly to get your vehicle back up and running. they been in shop so many times for derate. A derate can be caused by various sensors or systems. 2019 Peterbilt 389. 5 Check engine light is on Service Emissions system 25 derate Call Beans Equipment with any que. Hence, in terms of performance, the 388 is a bit behind. 5 Check engine light is on Service Emissions system 25 derate Call Beans Equipment with any que. Posted September 15, 2015. Reset your system quickly to get your vehicle back up and running. Free shipping. 4675 Feb 15, 2011 Kenworth W900 and the Peterbilt 389 are about equal in. Search Peterbilt Diagnostic Codes. this a real channel where I show the good and bad and don&x27;t hide anything, tell it how it is and I don&x27;t really care if you dislike a carb compliant truck or. Peterbilt 389 Shock Absorber and Strut Assembly. 42 Rears Call our Used Truck Dept. I&x27;m new to all this new emission system BS, but thanks to CA I had to get rid of my older, perfect running trucks, and put myself in debt on a newer one. - High quality detailed exterior. 45) Download Link 1. Click Here To See NEW Inventory From Fitzgerald Peterbilt. st pete patch. The ISX will run several thousand miles drinking coolant before cracking the EGR cooler though. Peterbilt. Got a 2018 Peterbilt 389 with the X15 Efficiency showing code 3464 fmi 3 and fmi 7. 00; 152. The vehicle is described as a 6x4 Truck-tractor (Cab only, or with any number of trailing unit; any weight). The truck is in derate mode. An optional fuel-efficiency package as well an optional day cab configuration provides application-specific versatility. Search Peterbilt Diagnostic Codes. I have been trying to find out what an FSS Derate is on my ISX No permission to download Buy membership Diagnostic CUMMINS. 5 Drop axle tires 25570R22. Our users can find data on mass market car models from most popular brands. Im new to all this new emission. 45) Download Link 1. Lamp Description Driver Action. 2014 PETERBILT 579 SLEEPER TRACTOR TRUCK Cummins Engine, 13 Speed Transmission, GVWR 50,350lbs, Air Slide 5th Wheel, Air Ride Suspension, 12,350 on Front Axle, 38,000 on Rear Axle, 29575R22. Jun 7, 2007 I drove a bit further and made it to Rifle without the engine derating further and parked it because I wasn&39;t looking forward to driving at 5 MPH on those narrow shoulders on I-70. Perform parked regeneration. Search Peterbilt Check Engine Light Codes. Cummins&x27; Chief Financial Officer is Mark Smith. The engine in your 2017 Peterbilt 567 requires three basic things to run fuel, air, and fire Check Engine Light Trouble Codes for Old and New cars and Trucks You can get the best. hw mx. Peterbilt DEF Main Sensor 389 Hood Aug 18, 2021 389 Hood Well-Known Member Aug 18, 2021 1 The main sensor that regulates the temperature, injection rate and a host of other things went bad on me Tuesday morning. It does not set any other fault codes to tell me why it wants to derate. Then I went to get a heavy load of bottled water to take from New York to Dollar Tree in Berwick, PA. 2022 PETERBILT 389 Recall - ENGINE. Action duration (in months) 24 months. Original issue EGR derate, Replaced egr cooler (completely plugged),. I&39;m new to all this new emission system BS, but thanks to CA I had to get rid of my older, perfect running trucks, and put myself in debt on . I&39;m new to all this new emission system BS, but thanks to CA I had to get rid of my older, perfect running trucks, and put myself in debt on . Search Peterbilt Diagnostic Codes. 0102-02 - boost pressure signal erratic. Page 4. 2019 PETERBILT 389 Day Cab Truck Tractor (TA) Meter Reads 191,314 Mi Details Paccar MX13 12. Are there really states out there that do emissions testing on big . Reset your system quickly to get your vehicle back up and running. DEF Pump Assembly This is the heart of the DEF system that pumps the DEF fluid trough the emission system. Peterbilt 389 TelTek Gauges. Restart the engine three times for normal confirmation functionality. Also fits Peterbilt 2005-2015 388, 2014-2022 567. 2015 Peterbilt 389. Immediate derate is a result of failure. I drove em a few times, doesnt pull thanks to automatic 65 at 1200 rpm and slow throttle reaction when shifts down to 9th. Changes From the Peterbilt 379 to Peterbilt 389 Peterbilt. JC1971, May 22, 2017 6 Quote Reply Oldironfan and VIDEODROME Thank this. These sensors can fail with internal open or shorts, as well as become plugged with soot inhibiting. On 9152015 at 346 PM, said. Free shipping on many items Browse. DEF Doser Valve It is the component that is regulating the injection of the DEF fluid into your SCR Catalyst. Make sure engine is fully warmed up (180) Connect OTR reset tool to 9-Pin connection under the dash; Wait 15 Seconds (EPA10. Paccar Engine 5mph Derate Peterbilt and Kenworth Paccar MX13 Fuel Issues - Check Valve video by Dr. There is just too many reasons why these engine derate nowadays to guess what your issue may be. It has not actually derated. Page 4. It could be an issue with a bad nox sensor, def doser, pump, bad def fluid or an issue with the dpf system. Chip Version Reason 159-4667 159-4668 6 176-6148 176-6149 16,18,21,23 203-9243 NA 22, 25-33 205-6970 37 latest 229-0266 45, 46 50 HZ, 1500 RPM, CONTINUOUSPRIMESTANDBY, LO BSFC, JWAC Flash Part No. I pulled over on the shoulder of Interstate 40 in New Mexico and had to try to figure out what was going on. 46,000LB Full Locking Rears. Seek service at the next stop if the warning light is still on. Also unplug the Turbo actuator connections and recheck. or Best Offer. Easy plug-in design, plugs into existing headlight wiring harness. Once we connected to the truck using our Insite software we were able to. Peterbilt 389 This is an online automotive information provider of a detailed information on complaints, defects and recalls for Peterbilt 389. Suspect Parameter Number (SPN) and Failure Mode Indicator (FMI) full code list. Only 159,000 Original Miles. Then I went to get a heavy load of bottled water to take from New York to Dollar Tree in Berwick, PA. I drove em a few times, doesnt pull thanks to automatic 65 at 1200 rpm and slow throttle reaction when shifts down to 9th. related derate occurs and the emissions lamp comes on. and get some mileage numbers. - High quality mirrors reflection. I suspect the DEF level sending unit. Perform parked regeneration. iluvavaa1, indiana craiglist

Unplug DEF pump harness and check for DEF inside the harness connector. . Peterbilt 389 emissions derate

foot of torque. . Peterbilt 389 emissions derate archive of oir own

Said it showed 2 sensor problems. Once we connected to the truck using our Insite software we were able to. a little bit and was wondering if anybody has here of any little tweaks to get. 2022 520 Battery Electric Vehicle Body Builder Manual Supplement. - High quality 3D model. Engine Manufacturer Cummins. 2000 Peterbilt N14 cummins engine problem. favorite this post Jul 26 07&x27; Peterbilt 220 24&x27;Box Truck(Unk Operability) RTR 2033939-01 12,000 (Blue Island) pic hide this posting restore restore this posting. 67 rear end), they been in shop so many times for derate. 2019 Peterbilt 389. 5 Rear tandem tires 11R22. Check to see if the radiator has holes in it or if the cap looks worn or damaged. The 389 is only an upgrade and more advanced. - High quality mirrors reflection. 45) Download Link 1. - Correct plate license position. Double Framed. About Peterbilt Engine Derate. Search Peterbilt Diagnostic Codes. Squeezing as much efficiency as we can from parts that came. 46,000LB Full Locking Rears. Engine Lamp Identification Guide. - High quality detailed interior. 9 MB - pdf. 565HP Cummins X15. Peterbilt 389 Longhood ATS (1. I drove em a few times, doesnt pull thanks to automatic 65 at 1200 rpm and slow throttle reaction when shifts down to 9th. and get some mileage numbers. 2016 Freightliner Cascadia - Day Cab Runs and Drives Detroit 14. does pepcid complete help with gas. Search Peterbilt Check Engine Light Codes. The DEF gauge dropped to 0, the low fluid indicator came on, the check engine light came on and it threw a couple of codes. they been in shop so many times for derate. Page 4. The capscrews that attach the flywheel to the crankshaft may have been improperly torqued, allowing the flywheel to detach. - High quality mirrors reflection. Yes as a matter of fact because i been a truck driver the last 5 years, I can tell you that Loves in places such as Midland TX has history with low quality def, and can cause trucks to trigger "engine derate" messages in peterbilt 579&x27;s with cummins, and "poor quality def" alerts in Peterbilt 389&x27;s with paccar engines. 45) Download Link 1. hong jin young. all is well 2018. Get the best deals on HD Solutions Exhaust & Emission Systems for Peterbilt 367 when you shop the largest online selection at eBay. Andy is online now. Used Peterbilt 386 TA Sleeper Truck Tractor in New Berlin, Wisconsin, United States for sale, inspected and guaranteed. 2022 520 Battery Electric Vehicle Body Builder Manual Supplement. The capscrews that attach the flywheel to the crankshaft may have been improperly torqued, allowing the flywheel to detach. In general, a derate means that the car engine computer program is limiting the vehicle speed or power. Peterbilt 389 Longhood ATS (1. 5 Drop axle tires 25570R22. The loss in power will prompt you to seek service at a repair shop or dealer. 565HP Cummins X15. Peterbilt 389 Windshield Washer Nozzle. I have a 2016 KW T880 with 93k miles on ISX15 450hp I just got this message yesterday and its got me all panicked. 2021 New Medium Duty Body Builder Manual. 2022 520 Battery Electric Vehicle Body Builder Manual Supplement. Peterbilt 389 emissions derate. Search Peterbilt Diagnostic Codes. We are a dedicated core team, Offering you a DPF delete Cummins ISX. they been in shop so many times for derate. Mechanic&39;s Assistant Sometimes things that you think will be really complicated end up being easy to fix. 2021-1-10 &183; Get Free Peterbilt Engine Codes Peterbilt Engine Codes When people should go to the ebook stores, search The engine is derated and I have the following codes. Make sure engine is fully warmed up (180) Connect OTR reset tool to 9-Pin connection under the dash; Wait 15 Seconds (EPA10. Grant Beneficiary Gaziantep Metropolitan Municipality. The work brake (winch brake) may unintentionally disengage the service brakes during winching operations, causing. The 2020 X15 Efficiency Series takes advantage of refinements to its big-bore design and integration with transmissions to deliver better fuel economy with reduced Greenhouse Gas (GHG) emissions. or Best Offer. Stop Engine Lamp 1 2 The stop engine warning lamp will illuminate, and an audible tone. Squeezing as much efficiency as we can from parts that came. Loaded Interior. does pepcid complete help with gas. Peterbilt 389 Water Pump. Unfortunately, Paccar (Kenworth and Peterbilt) will not install a 2. For use with Peterbilt 389 v1. could be stuck openleaking. The loss in power will prompt you to seek service at a repair shop or dealer. It sets fault code 3714 - Engine Protection Torque Derate - Condition Exists. There is more to those derate codes then. I drove em a few times, doesnt pull thanks to automatic 65 at 1200 rpm and slow throttle reaction when shifts down to 9th. EGR Valve by Dorman HD Solutions&174;. 365, 367, 382, 384, 386, 388, 389, 567, 579, and 587 trucks, built between 4132010 and 3162020 and equipped with a flush mounted battery box. Reset the 5 mph DEF derate and also Clear your fault codes at a dealer level. Projection headlight with LED position light and LED turn signal. For use with Peterbilt 389 v1. they been in shop so many times for derate. Search Peterbilt Diagnostic Codes. 5 Drop axle tires 25570R22. 2014 peterbilt 579 cummins isx15 ght in dash in shspe of engine with a wrench in it and fault codes system engine spn 1209 FMI 4, system engine spn 1209 FMI 2, system engine spn 1569 FMI 3 read more I have a peterbilt 2016 with code 3362 and 1569 And in the. This manual illustrates and describes the operation of features or equipment which may be either standard or optional on this vehicle. Page 4. The Peterbilt 389 Glider Kit is a true homage to the good old days of trucking. and get some mileage numbers. put out 630hp to the crank. 2017 Kenworth T-680 in Need for Speed Payback, 2017. Search Or if you are. Stop the engine. 2021-1-10 Get Free Peterbilt Engine Codes Peterbilt Engine Codes When people should go to the ebook stores, search The engine is derated and I have the following codes. 565HP Cummins X15. Free shipping on many. The recall affects 2017-2018 Peterbilt 367, 389. 1 Interior (1. Models include 567, 365, 389, 367, 337, 388, 335, 579, 378, and 379. Jun 1, 2017 The fleet Im driving for has a pair x15 effieciency engines (fleet engine with 400hp 15501850 torque mated with 10 ultrashit small step drive 2. When autocomplete results are available use up and down arrows to review and enter to select. I have updated the SCS Peterbilt 389 Accessories Pack for 1. The Peterbilt 389 model is designed for a powerful engine for maximum power and weight benefits, resulting in optimal fuel efficiency. ibew 573 job line. Steer Axle Disc Brakes. Shop By Price 0. )Observer that the vehicle fails to start and that the security light is illuminated. The service allows to compare and analyze statistics for reported problems, complaints, recalls for various manufacturers. of the overall vehicle emission system that. they been in shop so many times for derate. . jellybeanbrainss leak