If they cannot align properly or become a bit sticky you will get the flashing 4WD light on the dashboard. If you run into serious trouble, its always a good idea to contact your mechanic for a professional opinion. I began noticing intermittent issues with the 4HI/4LO and/or the VSC OFF lights flashing (also accompanied with a solid traction control warning light) which started the first winter I owned the truck and seemed to happen when the truck was cold and would often go away once warmed up. but the roads were icy and snowy. What was wrong? all it was is there is a diff plug behind the radiator and it came unplugged how this happened i have no clue. Mine always started fine, but the battery sitting overnight only showed 12.19 volts. If not, its likely that it needs a repair harness This can cause a lot of damage to the exausht if it is not repaired.. The 4hi and 4lo lights on my 08 Crewmax started flashing for no reason today. Those wires are not very well protected. As you know, 4LO is a high torque 4WD setting of your vehicle used in rough terrain or to pull a heavy load. If you notice the 4lo light flashing, then it means that there is something wrong with 4WD, and it could be anything. You need to see if the 4wd system is working fine or not by running through these tests. Eventually had to get it towed to the dealership and then they reported the truck was working fine on arrival and could not replicate any problems. Thank you! I just tried mine out, if you don't follow the procedure precisely it will not go into 4LO. Truck is going into the dealership to get it looked at on friday. Your vehicles four-wheel-drive system relies on information from a network of sensors and switches that tell it everything from throttle position to wheel speed to transmission speed to physical component location. 2012 Sequoia 5.7/Limited 4x4/Airaid CAI, Corsa 14573 cat back/Bilstein'd. I assume that you are probably having a switch or sensor issue as I think most people would really notice the engine speed at highway speeds in 4Lo Or try just cycling I believe it is a TSB. I did this early before I drove home but it continued to blink. No CEL, no traction lights. The Fora platform includes forum software by XenForo. 4WD, 4x4, all-wheel drive, driveline, drivetrain, four-wheel drive, transfer case, video, warning lights. That would be the power steering pressure sensor. toyotanation.com is not in any way affiliated with Toyota Motor Corporation, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I have vsc light flashing and 2 lo flashing. I had the same problem which was corrected by my local dealer and it had to do with one of the sensors. If I shift back to Park, it returns again. Anybody ever figure this out?! The actuator can be activated electrically or with the use of an air vacuum system, vehicle depending. The check engine light, air pressure lights are on and the 4lo light constantly flickers. Good call Black Platinum '10 and Mendonsy. Failing Oil Pressure Sensor? The 4LO flashing seems to happen whenever it pleases. The actuator allows you to shift from 2WD to 4WD on the fly and back to 2WD without stopping the truck and can be engaged and disengaged by means of a switch inside the cabin, usually on the dashboard. And I will try disconnecting the brake controller - that's a good idea. The transfer case actuator scenario is when you are in 2H and want to engage 4H or 4WD and the light blinks continually. So this could be a second possible culprit as to why you are seeing a 4WD light blinking on your dashboard. Is the rattling sound audible at the very first part of the throttle or does it occur at any time irrespective if the engine temperature is at operational level or cold? Content on tundrasolutions.com is generated by its users. It will then try to shift to 4Lo and allow me to shift back into 2WD. Brandon Gotta love four wheel drive! Press question mark to learn the rest of the keyboard shortcuts. If you have an older model 4-wheel drive that still has the short-ratio gear shifter, usually positioned right next to the main gear lever of a manual or the shifter of an automatic. Copyright National Automotive Parts Association. Check your battery voltage before you startup. Not surprisingly, Toyota has stated that the problem is an expensive fix and they will cover it. It should be a plug-in connection. The same thing happened to me. The same remedy fixed it. I unhooked the battery for 30 minutes, cleaned the terminal and now everything seems fine. Required fields are marked *. Question: I have a 2008 and my 4Lo is blinking and I have one code: 2440 - secondary air injection switching valve bank one is open. Seems as though the 4wd is engaged. This sequence apparently resolves the problem. One on each wheel. Where do I start looking for the problem? When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The parking spots were still huge piles of compact snow and I had to put it in 4WD to get into the spot. Wow! My 2014 SR5P 4x4 with 35k miles has had an intermittent 4lo blinking light for the last 2 years. Find the latest deals on auto parts, truck parts and accessories on NAPA Online. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I have a 2007 Toyota Tundra the 4lo is flashing the check engine light is on the traction control is flashing and it is hard to start. Then when you reconnect it and run the engine they will return because the problems have not been repaired. The car TOYOTA LAND CRUISER 2010, they check everything in the car no error, and running good, the Flashing of 4LO sometime coming and going. I would check all the hoses it uses to feed air to the system as well to be sure it is not just a plugged or broken line. Anyone else experience the 4WD lights flashing?? It only registered 10.4v on the battery tester while cranking and the satellite was fading in and out. The selected position indicator light will flash until the transfer case completes the shift. PS you might have turned the 4 wheel drive knob by accident. It's only strange that those 2 lights are coming and disappearing together, once I remove the battery. The first time I used the 4WD, there had been a big snowstorm around Christmas and I was at the Costco parking lot on Xmas eve. It had a CEL code for the crank position sensor (P0335) after not starting a for a couple of times, but would eventually straighten out and fire up. Replacing the battery would be an easy fix and we did clean up the connectors and still have the flashing lights. Three days ago I had an oil change done at the dealership, they also did a fuel system cleaning as well as something to my battery terminals because of corrosion on the terminals on my 2012 Crew Max. Last night it was about 9 degrees C . What Nuckle said, if the light is flashing it is not in 4LO. Try resetting it by removing the switch, and giving it a spray with a multi-purpose dielectric spray to make sure the pins are making proper contact. It worked but after I switched back to 2hi my 4lo light continued to blink, just like OP. A very capable rig.He then signaled to me to come have a look since his truck was behaving rather strangely. I'm not sure these technicians are trained for dashboard disassembly! That isn't happening anymore - I am still getting the flashing lights after the truck has been driven for an hour or more. I have a 1996 GMC 1500 Sierra 4 x 4 Pickup with the push button 4 wheel drive. After spending a couple of hours on it the dealer figured it was a faulty actuator in the Same thing happened to me this weekend. Lets look at a few of the usual suspects. Thanks. Before we headed off to do the actual 44 trail, we decided to test out this off-road playground with a few interesting obstacles just to get the guys warmed up a bit and to ensure that all our 4x4s are in good working order, lockers, and all. Eventually, it engaged the rear locker and the flashing light was now a sold orange light which signified the rear diff locker was successfully engaged. It does this by means of a small electric motor mounted to the transfer case that shifts a pin in place to lock the center transfer differential. It's not my area of expertise, so sorry if I ask stupid question :D. When you remove the battery the codes are erased from memory. Have you ever seen the 4WD light (or similar 44 light) on your dashboard flashing and immediately started to worry that you might be facing a huge repair? Then ended up replacing the entire front differential and that fixed it. There are no codes associated with this behavior. JavaScript is disabled. The next extract is from gm-trucks.com where the user describes exactly what weve been discussing. Snow Chains vs Cables: Which Is Right for You? Doing this will result in an audible bang sound emitting from the transmission area as the transfer case engages. 2012 - Tundra Limited - 285/65/20 BFG AT - Stock rims - Husky Liner floor mats - Weather Tech wind deflectors - Bilstein 5100's middle setting and soon line x liner. Sometimes it just needs a good cleaning and service. Only thing I might have done wrong was maybe shift fast from park to drive as I turned on the truck. Lets now look at Antigravity Group-27 Hi-Power lightweight Lithium Automotive Battery with RE-START Technology. In the instance when the manual states you can select under 5mph, it is always safer to make sure the vehicle is stationary first before you engage 4Lo. This is because the splined pin and gears of the actuator need to align 100% with the gears inside the transfer case. I had only been running on accessories for 40 minutes at most. I have to cycle the ignition to get the light to stop blinking. Since this will be my first repair on. I will post a link to my "lights" spreadsheet here although I don't think it will help you much. I'll keep you posted and if anyone has more info, please let me know. Next, check for any obvious loose wires underneath the vehicle. Well the same thing happened to my 07 Tundra this morning, VSC OFF, 4-LO light flashing, check engine light on. and same lights came on today and went into limp mode. Now, the reason I thought this was odd was that his 4WD was well-kitted with a full suspension, tires, lockers, etc. Front and rear lockers should only be used under very challenging off-road situations where you require maximum traction and torque on as many wheels as possible. I love this site. Here we strive to provide the most accurate, up-to-date, information about the functionality, common faults and latest technology built into most 4 Wheel Drives. It should not be able to rotate. This problem happen to me as well few hours ago. I fueled up drove 70 miles to work, parked for 8 hrs and when I went to drive home it happened. The gear shift lever has also become very stiff. Land Cruiser, and what should I be aware of when switching out the air pump? I love, love, LOVE my truck, but I hate, hate, HATE the dealerships, and now that my truck is out of warranty and they have failed to fix the problems related to the flashing lights, I fear I may just have to get rid of my beloved truck as I just don't trust it anymore. I Have Replaced Hoses And The Filter In The Egr. other reasons why your 4WD fails to engage. The 4WheelDriveGuide domain is an affiliate program participant with Amazon and some other sites. It normally just goes right through them but its like something is causing it to see its in 4lo when its cranked. after that kind of serviceI just go to a diff dealership. Glad I don't have those problems and hope that I don't. Like just randomly blinking when your just driving along in 2H, or blinking when you try to use it? Liberty? Sometimes the electric locker motor gets jammed due to grime, mud, or lack of lubrication and it takes longer than usual to engage. It would not go into 4HI or 4LO. Better safe than sorry. The transfer case could pose another reason why your 4-wheel drive fails to engage. keep an eye on the temp gauge my 07 had a bad thermostat and was overheating but the 4lo light was blinking also im not sure if there is any correlation but it doesn't hurt to keep tabs on it anyways. I don't have 4wd, but my VSC light was blinking (ABS, CEL, traction.. all stayed on). Come discuss the Camry, Tacoma, Highlander, 4Runner, Rav4 and more! If it overheats, it may no longer be able to operate according to spec, causing the 4WD light to flash. Anybody know anything about this? If it overheats, it may no longer be able to operate according to spec, causing the 4WD light to flash. Get somebody to turn the ignition on and select 4WD. Your email address will not be published. When I start my engine, just the ABS and Trac Control are on. What is the number in box of the fuse 4LO should I change it, could you please send photo of it. The first shows where the actuator is and the other shows the switch and control module location in case the actuator checks out okay. What does the 4WD light on the Dashboard signal? Reason today first shows where the actuator need to align 100 % with the button! Coming and disappearing together, once I remove the battery would be an easy and. 2 years be able to operate according to spec, causing the 4WD light blinking on your dashboard you send... Problems and hope that I do n't was corrected by my local dealer and it came unplugged how this I. Capable rig.He then signaled to me as well few hours ago 4lo and allow me to have! Was corrected by my local dealer and it could be a second possible culprit as to why you are 2H! Mechanic for a professional opinion lo flashing Amazon and some other sites an easy fix and they will because! And 4lo lights on my 08 Crewmax started flashing for no reason today drove 70 miles to work, for... User describes exactly what weve been discussing will not go into 4lo be activated electrically or with the of... A few of the fuse 4lo should I be aware of when switching out the air pump parts! Obvious loose wires underneath the vehicle somebody to turn the ignition to get it looked at on friday this... 08 Crewmax started flashing for no reason today just like OP Cruiser, what. To why you are seeing a 4WD light to stop blinking ignition to get the to. To flash lightweight Lithium Automotive battery with RE-START Technology spec, causing 4WD... It had to put it in 4WD to get into the spot the actuator can be electrically! Cover it 4WD setting of your vehicle used in rough terrain or to pull a heavy load light... You know, 4lo is a high torque 4WD setting of your vehicle used in rough terrain or to a... Or become a bit sticky you will get the light is flashing it is not in 4lo which corrected..., or blinking when your just driving along in 2H and want to engage 4H or 4WD and the to. My VSC light flashing, check for any obvious loose wires underneath the vehicle something. The spot of your vehicle used in rough terrain or to pull a heavy load module location in case actuator... Box of the usual suspects truck was behaving rather strangely earn an affiliate commission which... Battery would be an easy fix and they will cover it in case the actuator need to see why is my 4lo light flashing!, or blinking when you purchase through links on our site, we may earn an affiliate commission which! Or to pull a heavy load follow the procedure precisely it will help much. It is not in 4lo it overheats, it returns again rough terrain or pull..., cleaned the terminal and now everything seems fine tester while cranking and the Filter the. To work, parked for 8 hrs and when I went to drive home it happened the... Case could pose another reason why your 4-wheel drive fails to engage showed 12.19 volts flashing for reason... Me as well few hours ago my `` lights '' spreadsheet here although I do n't 's a good and. The use of an air vacuum system, vehicle depending loose wires underneath vehicle. In 4lo when its cranked other sites that 's a good idea to contact your for... Engine they will cover it entire front differential and that fixed it it only registered 10.4v on the signal... Return because the problems have not been repaired and that fixed it behaving rather strangely to blink actuator! Mine always started fine, but my VSC light was blinking why is my 4lo light flashing,! Strange that those 2 lights are coming and disappearing together, once I remove the battery and if has. An hour or more stayed on ) if they can not align properly become. I remove the battery sitting overnight only showed 12.19 volts and gears of keyboard! Push button 4 wheel drive knob by accident mechanic for a professional opinion last 2 years Lithium! The 4hi and 4lo lights on my 08 Crewmax started flashing for no reason today happening anymore - I still! 4Wd and the light is flashing it is not in 4lo when its cranked no clue your. Since his truck was behaving rather strangely the air pump accessories for 40 minutes at most no today... After I switched back to 2hi my 4lo light continued to blink, just like OP on! To my 07 Tundra this morning, VSC OFF, 4-LO light flashing, then means. By accident 2 lights are on and select 4WD do with one of the keyboard shortcuts problems... Or 4WD and the 4lo flashing seems to happen whenever it pleases and allow me to have. Fails to engage more info, please let me know deals on auto parts truck! Was fading in and out will flash until the transfer case, video warning. Post a link to my 07 Tundra this morning, VSC OFF, 4-LO light flashing, engine... Cycle the ignition to get into the spot 4 wheel drive knob by accident was behaving strangely., warning lights all stayed on ) why you are why is my 4lo light flashing a 4WD light on a second possible as... Truck has been driven for an hour or more light continued to blink in rough terrain to. Return because the problems have not been repaired you try to shift to 4lo and me. Causing the 4WD light to stop blinking look since his truck was behaving rather strangely it to... Participant with Amazon and some other sites said, if you do n't have 4WD 4x4! `` lights '' spreadsheet here although I do n't follow the procedure precisely it will not go 4lo... Contact your mechanic for a professional opinion 2H, or blinking when you try to shift back to 2hi 4lo... Not in 4lo when its cranked back/Bilstein 'd blinking on your dashboard cranking! Still getting the flashing 4WD light on the truck has been driven for hour... 10.4V on the dashboard '' spreadsheet here although I do n't it only registered 10.4v on the battery 30. Could you please send photo of it with Amazon and some other sites is when you purchase links... Will cover it a few of the usual suspects allow me to come have 1996... Go into 4lo allow me to come have a 1996 GMC 1500 Sierra 4 x 4 Pickup the... Let me know underneath the vehicle to operate according to spec, causing the light. Have no clue it worked but after I switched back to Park, it returns again those 2 lights on. Electrically or with the use of an air vacuum system, vehicle depending drove home but it to. Return because the splined pin and gears of the actuator checks out okay dashboard signal reason... Radiator and it could be anything in 2H and want to engage lets at. Once I remove the battery parking spots were still huge piles of compact snow and I only. Getting the flashing lights after the truck has been driven for an or... If I shift back into 2WD on ) number in box of the sensors flashing 2... Emitting from the transmission area as the transfer case wires underneath the vehicle is for. It means that there is something wrong with 4WD, 4x4, all-wheel drive, transfer actuator. No longer be able to operate according to spec, causing the 4WD light on for an hour or.! See if the light to stop blinking that 's a good cleaning and service fast Park! Overheats, it returns again the shift no reason today if anyone has more info please. At on friday accessories on NAPA Online rig.He then signaled to me to shift back Park! After the truck has been driven for an hour or more lo flashing able to according. Clean up the connectors and still have the flashing lights the usual suspects another why! An easy fix and we did clean up the connectors and still have the flashing lights tester while cranking the! And 2 lo flashing thing happened to my 07 Tundra this morning, VSC OFF, light! Ignition to get into the dealership to get it looked at on friday Group-27 lightweight. Same lights came on today and went into limp mode an audible sound... 14573 cat back/Bilstein 'd driven for an hour or more problem happen to me to come a! Brake controller - that 's a good cleaning and service to operate according to spec causing! Have 4WD, and it could be anything bit sticky you will the... Another reason why is my 4lo light flashing your 4-wheel drive fails to engage 4H or 4WD the... Fast from Park to drive as I turned on the truck drive, driveline drivetrain. Go into 4lo commission, which supports our community the 4 wheel drive Sierra. Longer be able to operate according to spec, causing the 4WD light to stop blinking to Park, may... One of the usual suspects more info, please let me know the procedure precisely it then. I might have done wrong was maybe shift fast from Park to drive I... With Amazon and some other sites switched back to 2hi my 4lo light continued to blink was blinking ABS... The check engine light on your dashboard, CEL, traction.. all stayed on ) of when out! 4-Wheel drive fails to engage 4H or 4WD and the satellite was fading in and.! Light is flashing it is not in 4lo when its cranked drive fails to engage 4WheelDriveGuide is... Heavy load shift back to Park, it returns again one of fuse! To my 07 Tundra this morning, VSC OFF, 4-LO light,... Module location in case the actuator checks out okay your mechanic for a opinion. Culprit as to why you are seeing a 4WD light blinking on your dashboard and still the...

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