What does SERV 4wd mean?

Asked By: Hajer Hla | Last Updated: 25th June, 2020
Category: automotive off road vehicles
4.7/5 (8,459 Views . 13 Votes)
Vehicles that have four wheel drive systems tend to have a separate light to indicate an issue with the system. Usually labeled “Service 4WD”, when this light comes on, a code will be stored in the computer's memory to help identify any issues. Depending on the problem, the four wheel drive may be disabled temporarily.

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Furthermore, what does service 4wd mean Dodge Ram?

Service 4WD Light on Dodge Ram. When the Service 4WD light comes on, it also shuts down the 4WD capability for the remainder of the drive cycle. This is a software issue and can only be corrected by flashing the computer's memory.

Secondly, how do you reset the service light on a 4wd? To reset the Change Oil light turn the ignition on but do not start and then push the gas pedal 3 times. The Service 4WD light is most likely the 4WD switch on the dashboard. If the lights are acting funny then the switch needs to be replaced. There is a quick fix for it though.

Regarding this, how much does it cost to service 4wd?

On average, a remanufactured transfer case costs depending on the make and model of your vehicle. The cost of labor to install it is in addition to the price of the unit and will typically run between $400 and $800.

Can you switch to 4wd while driving?

Older 4WD systems must be manually shifted between 2WD and 4WD and from 4HI to 4LO while the vehicle is stopped. Newer s 4 wheel drive systems have electronic push button 'on the fly' features that let you shift while driving. An AWD car can deliver all engine torque to all four wheels all the time.

30 Related Question Answers Found

What does service 4wd mean on 2013 Ram?

October 14, 2013 | by Information provided by Identifix Inc.
Some owners may get a “Service 4WD” light in the Cabin Compartment Node (CCN). When the system detects this, it shuts down the 4WD capability for the remainder of the drive cycle. This condition is not monitored when operating in 2WD mode.

Why is my service 4x4 light on?

Vehicles that have four wheel drive systems tend to have a separate light to indicate an issue with the system. Usually labeled “Service 4WD”, when this light comes on, a code will be stored in the computer's memory to help identify any issues. Depending on the problem, the four wheel drive may be disabled temporarily.

Can you still drive with a bad transfer case?

Driving your car with a bad transfer case is a bad idea. If you continue to drive with a transfer case that has a serious mechanical problem, you could destroy it beyond the point of repair, and possibly damage your transmission, driveshafts and axles in the process.

What are signs of a bad transfer case?

Symptoms of a Bad or Failing Transfer Case Output Shaft Seal
  • What is the transfer case output shaft seal? The transfer case output shaft seal is located on the transfer case of four-wheel drive cars, trucks, and SUVs.
  • Difficulty shifting gears.
  • Grinding noises coming from underneath the vehicle.
  • Vehicle jumps in and out of four-wheel drive.

How do I know if my 4x4 switch is bad?


tHE EASIEST WAY TO TELL IS IF YOU LOOK AT IT AND IT'S BLINKING A YELLOW LIGHT IN 4WD OR IF YOU HAVE A RED LAMP ON IN THE NEUTRAL POSITION. THIS SWITCH GOING BAD IS PRETTY DAMN COMMON. I KEEP A GOOD ONE IN MY DASH POCKET AND AT LEAST 2 GOOD ONES AT HOME.

How often should you change transfer case oil?

The transfer case fluid should be changed periodically, normally every 30,000 miles, especially in vehicles that tow or use four-wheel-drive often. If the transfer case fluid becomes contaminated or runs low, it can lead to the transfer case burning up.

What happens if transfer case is low on fluid?

If the fluid is low the transfer case can overheat, and cause parts to seize and not actuate properly between two- and four-wheel drive modes.

What fluid is in a transfer case?

Transfer case fluid is either synthetic or traditional gear oil, but like many vehicles, certain vehicles need certain types of transfer case fluids. It removes heat and lubricates the internal parts in the transfer case, keeping its gears cool and turning smoothly.

How do I reset my transfer case control module?

Cheap way - To clear the codes and reset the computer, pull the 5 amp TCCM fuse, located at the bottom of the fuse box. Wait at least a half hour, and then replace the fuse. Turn the ignition key to run, wait for the 4x4 lights to blink, and then turn off. Repeat 5 times, and then start the truck.

Why is my service all wheel drive light on?


The "Service AWD System" light comes on when the computer detects that there is an issue with the AWD system. Also, keep in mind that sometimes this warning will come up for serious issues that can cause damage to the AWD system if the vehicle continues to be driven.

Why is my 4wd flashing?

A lot of the time, a flashing 4WD light is no reason to be alarmed, because it simply means that the system is working as designed. On vehicles where four-wheel drive is only activated on demand — that is to say, when traction conditions require it — this light shows up to tell you that it's been activated.

What does a 4 wheel drive actuator do?

The four-wheel drive axle actuator housing, sometimes called the axle disconnect housing, is part of the differential that houses the gears and shift fork required to lock both front axles together. Four-wheel drive (4WD) systems allow the engine to drive all four wheels of a vehicle simultaneously.

How does a transfer case switch work?

The transfer case receives power from the transmission and sends it to both the front and rear axles. This can be done with gears, hydraulics, or chain drive. On some vehicles, such as four-wheel-drive trucks or vehicles intended for off-road use, this feature is controlled by the driver.

How do I get my truck out of 4 wheel drive?

How to Disengage a Stuck Four-Wheel Drive Line
  1. Check to see if you have manual hubs and that they are in "free" mode.
  2. Put your vehicle into four-wheel high mode.
  3. Drive forward for about a quarter of a mile.
  4. Stop the vehicle and shift from four-wheel to two-wheel drive.
  5. Place the vehicle in reverse and drive backwards for 15 to 20 feet.

What is all wheel drive service?


Four-wheel drive vehicles, sometimes called 4x4 or all-wheel drive, demand rugged performance, especially when used for off-roading and towing. It helps deliver power from the transmission to the wheels. In four-wheel drive, power from the engine is directed to both the front and rear axles.

Is it bad to drive in 4x4 on the highway?

The short answer is: Yes, it can be safe to drive in 4WD on the highway as long as you're going very slowly and so does the rest of the traffic around you. In other words, only during severe road conditions that require you to.

How fast can I go in 4 wheel drive high?

The facts about 4-High: 4-High allows your vehicle to drive at fast speeds (manufacturers often recommend no faster than 55mph) while power is sent to all four wheels providing your car with better traction than 2-wheel drive. Depending on the application, most drivers will use 4-High more regularly than 4-Low.