P0641 gmc yukon. Makes GMC_Truck 2009 Yukon XL - 4WD Diagnostic Navigation .

P0641 gmc yukon facebook. Search Fixya. P0641 is a failure of the PCM reference Sep 2, 2018 · I'm getting the P0641 fault code on my 2007 Chevy Equinox. com Absolutely NO-E Makes GMC_Truck 2006 Yukon - 4WD Accessories DTC P0641 5-Volt Reference 1 Circuit. I cleaned the grounds and cleared them. Each time it throws a P0641 - 5V Reference #1 This 2010 Chevy Impala has a very intermittent glitch that puts the PCM into REDUCED POWER mode. Jun 1, 2017 · NOTE: Be aware that since code P0641 could involve open circuits in the CAN (Controller Area Network) bus system, access to an oscilloscope and a wave form library may be required to diagnose code P0641 accurately. I explain why it's happening and show you how to troubleshoot the fault. 0L LM2 Involved Region or Country United States, Canada, Mexico, Middle East, Chile, Paraguay, Uruguay, Thailand, Makes GMC_Truck 2008 Yukon XL - 2WD Driver Information and Entertainment P0641. Take your time find the evidence and fi DTCs P0641 and P0651 run continuously when the above conditions are met. Engine & Drivetrain . This means that there is an issue with the voltage signal being sent to a sensor in the vehicle, which could potentially affect the performance of various systems. GMC Yukon Reduced Engine Power message. Jul 23, 2021 · common failure location in the gmc car misfiring sometimes air-condition not working because 5volt short Jul 29, 2021 · I’ve got an 09 Tahoe LTZ 4x4 with 216,000 miles. P0641--Air Conditioning (A/C) Refrigerant Pressure Sensor 5-Volt Reference 1 Circuit Customer: P0641 code in my 2008 Chevy Silverado . 1. P0641 after oil pump replacement P0641 after oil pump replacement. P069e. Jul 30, 2021 · Note: The definition of code P0641 may be different depending on the vehicle manufacturer. This truck has a brand new engine with many sensors/parts replaced 2 months ago: Nox sensors All o2 sensors MAP MAF Spark plugs/coil packs Starter Alternator Brake booster Throttle body Truck ran great for 2 months after it underwent everything above. I think my main problem is 641. According to the autozone print out I should replace the fuel pump control module. Makes GMC_Truck 2007 Yukon - 4WD Diagnostic Navigation P0641. Customer: 2007 gmc Yukon SLT. 550/W Unicode) /Creator (Arbortext Advanced Print Dec 7, 2017 · Its a 2008 GMC Sierra 1500 SLT Crew Cab. Common causes for P0641. 3 %âãÏÓ 1 0 obj /CreationDate (D:20211109084656) /Producer (Arbortext Advanced Print Publisher 9. 2L L87, 4. Quite annoying. Conditions for Clearing the DTC. 0 hour of labor. Con Los Siguientes Problemas. P0641--The Crankshaft Position (CKP) Sensor 5-Volt Reference 2 Circuit Makes GMC_Truck 2007 Yukon XL Denali DTC DTC P0641 or P0651 Diagnostic Instructions • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic Makes GMC_Truck 2008 Yukon - 4WD DTC DTC P0641. 5 LB7 Forums. The code P0641 can be triggered by various issues, including: Aug 21, 2023 · When the PCM detects an open circuit in the ‘A’ reference voltage circuit, it stores the P0641 code and may trigger the check engine light on your GMC Sierra. It means that there is a Range/Performance problem. Aug 6, 2015 · This 2008 GMC Yukon came in with the complaint of reduced power and the vehicle could not be driven over about 35 mph. › GMC Yukon Denali. ABS and Brake lights have come on randomly for past couple years, but everything still worked. P0641--Air Conditioning (A/C) Refrigerant Pressure Sensor 5-Volt Reference 1 Circuit 3. GM has identified the cause of the P0641 to be a chaffed wire in the ECM wiring harness. if some have and some dont, unplug one at a time and see when the reference voltage returns to 5. once all sensors are back to 5 volts, then all will be good and you can clear the code. Expert. If you’re experiencing the P0641 fault code, it could be due to a faulty Engine Control Module (ECM), an open or shorted ECM harness, a poor electrical connection in the ECM circuit, or a shorted sensor on the 5 volt circuit. I back probed the MAF. P0641--Air Conditioning (A/C) Refrigerant Pressure Sensor 5-Volt Reference 1 Circuit Makes GMC_Truck 2007 Yukon Denali Diagnostic Navigation Vehicle Diagnostic Information P0641. This can be a tough Jun 13, 2017 · 2007 - 2014 Tahoe/Yukon/Escalade Models. D. to/2tdNh5k Check out our Amazon Store for the tools a Jan 17, 2019 · 2015 - 2020 Tahoe/Yukon/Escalade Models. Mar 15, 2022 · Quite annoying. 2L >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P0641 Aug 13, 2022 · There are factory service bulletins for the P1516 code on the following GMC vehicles: 2006-2007 GMC Savana 1500/2500/3500 2006-2007 GMC Sierra 2006-2007 GMC Sierra Flex Fuel 2006-2007 GMC Sierra Hybrid 2006-2007 GMC Sierra Performance Edition 2006-2007 GMC Sierra 2500/3500 HD 2006-2007 GMC Yukon GMC Factory Service Bulletin OBDII Code P1516 2007 Chevy Tahoe LTZ 5. %PDF-1. GMC P0641 5 Volt Reference Voltage Incorrect Granite Concept,2009 GMC Sierra Hybrid Crew Cab,2008 GMC Yukon Hybrid,2008 GMC Denali XT Concept,2007 GMC Yukon XL Jul 16, 2020 · 2013-2017 GMC Terrain Equipped with 3. I keep getting code P0641 and P1125 on code reader and have replaced all the parts including the computer and 2004 GMC Yukon got a code p1125 (APP) Paul M ASE Master. 0L LM2 P0641 GMC Yukon 2007 5V reference 1 cercuit Problem solve Jul 23, 2020 · 2007 GMC Yukon Denali 6. August 2006 edited June 2015 in GMC. This 2009 GMC Yukon Denali came in with the "Reduced Power" message in the instrument cluster. Stabilitrak OFF . 7L L3B, or 3. Keep in mind that the P0641 code is a generic trouble code, which means it applies to all model years of the GMC Envoy built after for the 1996 model year and up. 0L is throwing a P0641 ,P0101,P0155, P0332. 🥰💕 ️😇 Customer: GMC Yukon 6. Therefore, if the diagnostic/repair information presented here does not resolve the problem and an oscilloscope and reference data Los síntomas de un código de avería P0641 pueden ser: Pérdida de potencia del motor; Problemas de arranque; Luces de advertencia del motor encendidas; Problemas de rendimiento del vehículo; Causas del código DTC P0641. If you cannot duplicate the DTC, the information in the Failure Records can help determine how many miles since the DTC set. Using the Failure Records data may help locate an intermittent condition. I scanned the vehicle got P0641 5V Nov 25, 2016 · I'm getting code p0641 sensor reference voltage "a" circuit/open. 0L engine my 2002 had same problems and to fix, I loosened the hose clamp on the throttle body air intake to air box hose. Answered by Bart in 3 mins 1 year ago. Makes GMC_Truck 2008 Yukon Denali Driver Information and Entertainment Cellular, P0641. P0641 Code on my 2003 Duramax I have a 2003 GMC Sierra 2500HD diesel 6. Makes GMC_Truck 2008 Yukon Denali Diagnostic Navigation Vehicle Diagnostic Information P0641. I searched this subforum for p0641 with no luck. Any clues as to what might be going on? and p0641. 6L Engine (RPO LFX) Cause of a P0641 Code GM vehicles. bonddog Member Posts: 6. Bart. I removed the water pump. Makes GMC_Truck 2009 Yukon XL - 4WD Diagnostic Navigation P0641. Service Traction Control. GMC YUKON XL 2010. 0L DTC P0641 Circuit Description The powertrain control module (PCM) provides 5 volts to the following sensors: Makes GMC_Truck 2006 Yukon - 2WD Accessories DTC P0641 5-Volt Reference 1 Circuit. The chaffing occurs because the ECM wiring harness is rubbing on the ECM bracket. Consult the appropriate repair manual or repair database for the exact code definition. P0107. Aug 4, 2020 · Starting the Tahoe, there are no issues until I give the truck throttle and then I am sent into limp mode. These are the most common problems that can cause the P0741 in the Yukon: Bad Torque Converter Lock up Solenoid– The solenoid that allows the torque converter to lock up is often the culprit. 3L (RPO L83) or 6. Diagnostic Aids. The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. What are the Possible Causes of the P0641 Code? Wiring or connection issues can cause the P0641 code. DTCs P0641 and P0651 run continuously when the above conditions are met. 14,668 satisfied customers. El código P0641 puede significar que se han producido uno o más de los siguientes problemas: Makes GMC_Truck 2007 Yukon Denali DTC DTC P0641 or P0651 Diagnostic Instructions • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic Jun 27, 2021 · Don't be a parts changer!!! Here is a perfect example why is not recommended to replace parts just because of a code. P0641--The Crankshaft Position (CKP) Sensor 5-Volt Reference 2 Makes GMC_Truck 2009 Yukon Denali DTC DTC P0641 or P0651 DTC P0641 or P0651 Set in ECM Diagnostic Instructions • Perform the Diagnostic System Check - Vehicle prior Makes GMC_Truck 2008 Yukon - 4WD DTC DTC P0641. Thanks. Dealer says it is probably only one sensor that is causing all the other codes. Service Stabilitra May 3, 2023 · #cadillac #cadillacescalade #gmcsierra #gmc #gmcyukon #chevy Aug 4, 2016 · 2000 - 2006 Tahoe/Yukon/Escalade Models. 5 LB7 Duramax Powertrain Need help diagnosing P0192 code. Browse Categories Answer Questions . Posted by Anonymous on Apr 18, 2014. The condition was more pronounc Feb 18, 2020 · FIX CODE P0107 P0106 ENGINE LIGHT ON CHEVY, CHEVROLET, BUICK, GMC, CADILLAC Car Scanner: https://amzn. LEER SOLUCIÓN DEL CÓDIGO O 2014-2017 GMC Sierra 1500 2015-2017 GMC Yukon Models With 5. GMC Yukon P0741 Diagnosis. P0641--Air Conditioning (A/C) Refrigerant Pressure Sensor 5-Volt Reference 1 Circuit Dec 1, 2020 · #5VoltsReference #GMCYukonXLP0651 5VOLT REFERENCE 2 CIRUIT/GMC YUKON XL MODEL 2016Like and follow my Facebook Page: https://www. Find a shop in your area. Jan 6, 2013 · I get all the dic messages, but borrowing a code reader yielded P0641. Aug 21, 2023 · What does a P0641 code mean for GMC Yukon? A P0641 code means that your GMC Yukon’s Powertrain Control Module (PCM) has detected an issue with the 5-volt reference circuit voltage, which may be higher or lower than expected. Each time it throws Jan 18, 2019 · 2007 - 2014 Tahoe/Yukon/Escalade Models. 3L LV3, 2. OBDII P0341 means that there is a problem with the Camshaft Position Sensor (CPS) Aug 21, 2023 · When the PCM detects an open circuit in the ‘A’ reference voltage circuit, it stores the P0641 code and may trigger the check engine light on your GMC Envoy. P0641 5V Reference 1 Circuit. Pueden haber diversas razones por las que se detecta un código DTC P0641 en un vehículo. P0641--Air Conditioning (A/C) Refrigerant Pressure Sensor 5-Volt Reference 1 Circuit Customer: Eric, I'm having trouble locating the cause of the P0641 code on my 2010 Yukon XL Denali. Does this sound credible? The P0641 GMC diagnostic trouble code (DTC) refers to a 5-volt reference circuit malfunction in the vehicle's electrical system. 0L LM2 Sierra 1500 2020 2021 Sierra 1500 - (Limited, RPO J21, 12th VIN Digit = 4 or less) 2022 2022 Yukon Models 2021 2022 3. Mechanic's Assistant: What's the approximate mileage on your 2007 GMC Yukon? Customer: 180k Mechanic's Assistant: How often is the GMC Yukon typically serviced? Customer: 5 volt ref 1 code p0641 Mechanic's Assistant: Is there anything else the Chevy GMC Yukon Mechanic should know before I connect you? Rest assured May 6, 2020 · Throwing a P0641 code 5 volt Stabilitrak, traction control, and engine power reduced shown. May 10, 2021 · #GMCYUKON#REDUCEPOWER Jul 17, 2022 · To diagnose the P0641 GMC code, it typically requires 1. 3. Answered by Eric in 15 mins 7 years ago. Customer: 07 GMC Yukon Reduced engine P0641 Traction control Service stabalitrac Engine stalls won't recrank for about an hour. p2101 and p2230. the reference voltage at the sensors should all be 5 volts. From what I have read, P0641 doesn't necessarily mean TPS. I back probed the MAF and throttle body they are ok. I replaced the Map sensor hoping that was the culprit and it was not. Makes GMC_Truck 2006 Yukon - 2WD Accessories DTC P0641 5-Volt Reference 1 Circuit. This circuit is crucial for providing a stable voltage supply to various engine sensors and components, ensuring their proper operation. There was a code P0641 stored. Oct 1, 2021 · A forum community dedicated to all General Motors truck owners and enthusiasts. I removed the power steering pump rack assembly (5 bolts) and pushed it off to the side. Two went away, but the C0265 remains. Por lo tanto, el grado de criticidad variará de un caso a otro. Latest: tony97218; 2 minutes ago; Interior. . Every time it rains I will get a P0641 code and the truck will go into limp mode and usually will stall out. Thread starter WBH05; Start date Makes GMC_Truck 2008 Yukon - 4WD Diagnostic Navigation P0641. P0641 symptoms. Here’s a good article on how to diagnose and repair the TCC Solenoid. P0641--The Crankshaft Position (CKP) Sensor 5-Volt Reference 2 Circuit The P0641 diagnostic trouble code (DTC) indicates that there is a malfunction in the Sensor Reference Voltage 'A' Circuit/Open. Home >> GMC >> 2007 >> Yukon XL Denali AWD V8-6. at D&DTire. 3L L84, 6. Mechanic's Assistant: Just to clarify, what's the exact code? And have you tried to reset it? Customer: I cleared them all out P0641 comes back after a few miles and the engine goes into limp mode Sorry the video is sideways. Pretty hard to get it to crank back up and even if I do it keeps wanting to die intermittently as I drive. La gravedad del código de fallo almacenado P0641 depende de cuál de los sensores del circuito se ha roto. Eventually I'll figure out a DTCs P0641 and P06A6 are Type A DTCs. Causas del fallo. 2008 CHEVROLET TAHOE/SILVERADO Motor 5. There were a lot of codes stored but the only one of real relevance was Code P0641 Symptom 00, 5 volt reference circuit 1. P0641--The Crankshaft Position (CKP) Sensor 5-Volt Reference Makes GMC_Truck 2009 Yukon XL Denali DTC DTC P0641 or P06A6 Diagnostic Instructions • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic DTCs P0641 and P0651 run continuously when the above conditions are met. P2127. The motor goes in limp mode. 0L, I'm getting a P0300 and P0171 code, please help with your thoughts. Conditions for Setting the DTC The ECM detects a voltage out of tolerance condition on the 5-volt reference 1 or 2 bus for more than 0. 4. Even if you can't fix it, Has for P0641 that is a problem in #1 bus 5volt reference system. Jul 16, 2020 · The P0641 code is a generic OBD-II trouble code that indicates a problem with the 5-volt reference “A” circuit. 0L DTC P0641 Circuit Description The powertrain control module (PCM) provides 5 volts to the following sensors: Makes GMC_Truck 2008 Yukon XL - 4WD Driver Information and Entertainment P0641. A Toyota P2443 Code is pretty common and is a DIY fix. com/AutoDiagnosticPh Cod #P0641 GMC Yukon Denali 2008 - Yukon GMC Cars & Trucks. The reduced power along with the service stabilitrak message kicks on. I also have code P0122,P0449,P0463. GMC Sierra 1500 (New Model) 2019 2019 Equipped with 5. P0641--Air Conditioning (A/C) Refrigerant Pressure Sensor 5-Volt Reference 1 Circuit Makes GMC_Truck 2006 Yukon - 2WD Engine Engine DTC P0641 5-Volt Reference 1 Circuit. Virtual Wrench. and p0532. Yesterday it did it again and I got P0107, P0106, P0452, P0522, and P0641. Makes GMC_Truck 2007 Yukon - 2WD Driver Information and Entertainment Cellular, Entertainment, and Navigation DTC P0641 or P0651 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Then opened the butteryfly by hand and used throttle body cleaner, used carb cleaner on another, and removed all the black grime that collects around the throttle body butterfly. This reference voltage is crucial for the operation of various sensors in the vehicle, including those that monitor engine functions, transmission, and other key systems. How can I diagnose OBDII code P0606 in my GMC vehicle? Nov 9, 2018 · P0341 is a somewhat common OBDII diagnostic code in the GMC Yukon. Each time it throws Customer: 2000 GMC Yukon, later style with 5. May 18, 2008 · SOURCE: i have a 2002 gmc yukon denali xl with 6. If I delete the codes I can drive normal speed again, albeit quite rough. Sep 3, 2013 · P0641 - Sensor Reference Voltage 'A' Circuit/Open. Inspect ECM wiring harness GMC Yukon 6. Please discard PIT5307D. 3L, and 6. When I recorded it I like to use hold the camera sideways and it flipped when I uploaded the video. 3L L82, 5. Jump to Latest DTCs P0641 or P0651 are not set. Oct 23, 2023 · I have P0641 code At first I had several codes, P0641-P0452-P0532 Chevy Silverado and GMC Sierra Forum. I have this intermittent issue of: Engine Power is Reduced. 2 So I attempted to install a new oil pump but was interrupted half way and had to stop. Apr 23, 2010 · The check engine oof course lit up and the code it gave is P0641. 2L. 2007 GMC Yukon XL Denali; GMC Yukon XL Car and Truck; GMC Car #P0641troublecode #referencecircuitproblem camshaft sensor short circuitالسيارات متخصصة في إصلاح السيارات للسيارات اليابانية والأمريكية. Jan 18, 2019 · 2007 - 2014 Tahoe/Yukon/Escalade Models. Algunas causas pueden ser: DTCs P0641 and P0651 run continuously when the above conditions are met. Sep 4, 2018 · See Also: P0700 GMC Yukon . that would be the bad sensor pulling down the reference voltage. 01-04. DTCs P0641 and P06A6 are Type A DTCs. Lead Tech. Jul 6, 2023 · I scanned the vehicle got P0641 5V reference 1 Cir this is Chevrolet Tahoe 2009 with 5. Te suministramos todo lo que necesitas saber sobre el código DTC P0641 Descripción, causas, síntomas y posibles soluciones. Engine & Drivetrain 2000 gmc Yukon with constant flasher clicking noise. I purchased it from a local used lot May 2017 with 85k miles and Im at 110k. Keep in mind that the P0641 code is a generic trouble code, which means it applies to all model years of the GMC Sierra built after for the 1996 model year and up. I recently bought a scanner and found several ABS related codes. I purchased my 2006 Yukon last September Makes GMC_Truck 2006 Yukon - 4WD Accessories DTC P0641 5-Volt Reference 1 Circuit. Thread starter George Owens; Start date Nov 13, 2019; Disclaimer: Links on this page pointing to Feb 1, 2022 · GMC Sierra 1500 (New Model) 2019 2019 Equipped with 5. Engine Power is Reduced. This means that the engine control module detects a problem within its voltage supply to various sensors. I used a factory gm puller and tried with that along with O'Reillys 2008 GMC denali p0641. I have a brand new throttle body on the vehicle by the way. 3L. It could be, but it also could be about 4 or 5 other things. How serious is OBDII code P0606 in a GMC vehicle? OBDII code P0606 in a GMC vehicle should be addressed promptly as it can lead to performance issues and potential long-term damage to the vehicle's engine control system if left unresolved. Makes GMC_Truck 2006 Yukon - 4WD Body Wiring DTC P0641 5-Volt Reference 1 Circuit. 2L (RPO L86) Engine This PI was superseded to update Condition/Concern and model years. 3L engine comes to the workshop with a problem of engine power reduce. An illuminated check engine light; Sensor-related performance problems; Get it diagnosed by a professional. Makes GMC_Truck 2006 Yukon - 4WD Engine Engine Controls - 4. Want Answer 0. Please help 06 CHEVROLET IMPALA P0641 CODE P0641 DONT KNOW WHAT THUS PART IS? 2013 GMC Yukon - P0641 Hi, Wanted some opinions before i take this in for service. 3 with codes p050d, p0641. P0641--The Crankshaft Position (CKP) Sensor 5-Volt Reference 2 Doing a repair or project?? Want to be part of a Friend's Edition Episode? Interested Subscribers should contact Rob at RM@Axlesgarage. 4M posts 214K members Since 2009 A forum community Cod #P0641 GMC Yukon Denali 2008 - GMC Cars & Trucks. Our Chevy Mechanic will be able to help you diagnose and resolve the P0641 code, reduced engine power, and stabilitrak light issue. Operation CHARM : Car repair manuals for everyone. 3L The C0242 code is a generic diagnostic trouble code (DTC) that commonly appears in General Motors (GM) vehicles, including Chevrolet (Silverado, Impala, Malibu, Tahoe, Traverse), Buick, Buick Enclave, Cadillac, and GMC (Acadia, Sierra, Yukon) models. Makes GMC_Truck 2007 Yukon - 2WD Diagnostic Navigation P0641. This has happen a few times and I thought I had found this issue but I have not. BMW OBD2 codes; Check engine light on but no codes stored; Chrysler OBD2 codes; GM OBD2 codes Jun 14, 2014 · Chevy / GMC Duramax 01-04. Code P0641 is typically caused by one of the following: A faulty sensor; Wiring issues; A problem with PCM; How to diagnose and repair P0641 Perform a preliminary inspection Customer: 2018 gmc yukon xl slt 5. P0641--The Crankshaft Position (CKP) Sensor 5-Volt Reference Makes GMC_Truck 2008 Yukon Denali Driver Information and Entertainment Cellular, P0641. In layman terms this means that there is a problem with the signal coming from the Camshaft Position Sensor (CPS). Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! Makes GMC_Truck 2006 Yukon - 2WD Accessories DTC P0641 5-Volt Reference 1 Circuit. P0641--Air Conditioning (A/C) Refrigerant Pressure Sensor 5-Volt Reference 1 Circuit Makes GMC_Truck 2006 Yukon - 4WD Engine Engine Controls - 4. I know it is a 5 volt reference somewhere. Code p0641 Chevy Tahoe, I have a 2002 GMC Yukon Denali 6. Condition/Concern Oct 10, 2020 · السيارة فيها مشكلة تقطيع وتطفي م تشتغل Detailed repair manual for the 2007 GMC Yukon XL Denali AWD V8-6. P0641--Air Conditioning (A/C) Refrigerant Pressure Sensor 5-Volt Reference 1 Circuit 2006-2007 GMC Yukon GMC Factory Service Bulletin OBDII Code P1516 2004-2012 GMC Canyon P0641 GMC - 5 Volt Reference Voltage Incorrect Read more: https: 2007 Chevy Tahoe LTZ 5. 2015 suburban Reduced engine power , code P0191 (fuel rail pressure sensor) Thread starter iras1976 Customer: P0641 Code, reduced engine power, stabilitrak light GMC Mechanic's Assistant: I'm sorry to hear about the trouble you're experiencing with your GMC. I've performed the troubleshooting you posted previously and believe I may have a wiring issue rather than a bad sensor or control module. 1. 2002 gmc Yukon Xl 4x4 getting 9 miles per gallon new fuel pump pressure regulator plugs and Nov 15, 2013 · fault code p0641 - GMC 2007 Yukon XL Denali question. P0641 code indicates an issue with the Sensor Reference Voltage ‘A’ Circuit. The specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. 5 second. Back last year I had a problem where my truck was idling in the driveway (cold winter morning) and it began idling a little rough and died, I wasnt inside the truck when it happened but when I went out it said reduced engine power and I got the same P0641 code that I now have. When it faults the engine stays on but the truck has no power and runs at about 4 or 5 mph max. Kurt Mulling. 8L, 5. 6 duramax with a P0641 code and it is in limp mode. cfkn mvrb bsqh ypkcnb xvryjmy suqf qepmt fcv vufdrl owduiai zjc osdtkphy spjnxyg xhemz qzlrwlep