Q: Four-wheel drive light.

asked by on December 21, 2015

The 4-wheel drive light keeps coming on.

On an electronic four wheel drive system such as this one there are a few different things that may trigger a four wheel drive light. A faulty solenoid or motor on the transfer case, an inoperative front differential actuator, or simply a bad switch could all cause this issue. I believe it is also possible for the four wheel drive light to come on if a wheel speed sensor has a fault. However, this issue would also be accompanied by an ABS and/or Trac Off light. An inspection of the four wheel drive system by a qualified mechanic would be my first recommendation.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

I changed the throttle body on 2006 Chevy impala and it says service throttle body after resetting it.

Hi there. Check the resistance on the throttle position sensor on the throttle body and the throttle pedal position sensor on the gas pedal. There should be a resistance on the sensors. If one or both sensors have no resistance...

I have a small transmission fluid leak and need a flush and bushing replacement on a 2006 Pontiac G6. How much should that cost?

If the fluid leak is from the transmission oil pan, the leak will be resolved once the transmission fluid and filter is changed. In practice, when the oil pan is re-installed after draining the fluid, a proper pan to transmission...

Car shut down and will not start. Warning lights are on - 2006 Toyota Highlander

Hello. From what you describe, it would appear that your vehicle is having some sort of electrical issues. The "Generator Inverter Performance" warning comes on when the computer detects an issue with the vehicle's electrical generator inverter. The generator inverter...

Related articles

How to Get Hummer Dealership Certified
Hummer car dealerships offer automotive technician jobs to mechanics who are Hummer certified through the Universal Technical Institute.
Hummer Certified Pre-Owned (CPO) Car Program
If If you are in the market for a used Hummer vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read...
Understanding the Hummer Oil Life Monitor Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Hummer Oil Life Monitor (OLM) system indicates when and what service your car needs.