AUTONET TV

Why You Have an O2 Sensor (Oxygen Sensor)

If someone asked you what gas made up the largest portion of the atmosphere, what would you guess? Well, it's not oxygen; it only makes up 20.9 percent.  But since we're talking about oxygen, you should know that your vehicle uses oxygen sensors to make sure your engine is running the way it should.

The oxygen sensors measure how much oxygen is in your exhaust.  If there's too much, it means there's a problem with the mixture of fuel and air.  The sensor sends signals to computers in your engine and adjusts the mixture so it maximizes performance and efficiency.  It does this constantly. 

Many vehicles have multiple oxygen sensors.  Some have one close to the engine, another close to the muffler.  Two measurements are better than one since they allow readings to be more accurate.  You may have a vehicle with a dual exhaust, so you'd have twice as many oxygen sensors.

Your oxygen sensors can fail.  One thing that can damage them is contamination from bad fuel.  The sensors can simply wear out, though they usually last a long time.  It's not unusual for an oxygen sensor to last 100,000 miles/160,000 km. One more thing that can cause an oxygen sensor to fail is residue from an engine that's burning oil.  Plus contaminants from the road like salt can also cause problems. 

Here are some signs that your oxygen sensors might be failing.

• The Check Engine light goes on.  In this case, your service facility can plug in a device that will read the code in your engine's computer to see if that's the problem.
• The engine is running roughly.
• Black, sooty smoke is coming out of your tailpipe.
• Your fuel economy is noticeably lower than it used to be.

Head to your service facility and tell your advisor what symptoms your vehicle is experiencing.  They have the equipment and training to track down the issue.  Note that simply replacing the oxygen sensor is often not enough since it doesn't get to the root of the problem; other repairs may be needed. 

So make sure your oxygen sensors are working the way they should be.  Oh, and back to the question of what gas makes up most of the Earth's air?  It's nitrogen, which comprises 78 percent of the air we—and our engines—breathe.

AutoChoice Service Center Inc.
2009 S. Yost Ave.
Bloomington, Indiana 47403
812-339-9898

The Vivacious Vernal Vehicle (Preparing Vehicle for Spring)

Most of us look forward to spring because the days are longer, the weather's warmer and we can finally get our vehicles into warm weather mode.  Here are a few things that will breathe fresh energy into anyone's car, SUV, truck or van.

First thing is a good cleaning, especially underneath. If you live where salt and brine are used on the roads, it's important to get that off.  One thing to note… if you hose off your undercarriage, be careful not to get your spark plugs/wires wet.  You could notice your vehicle running rough plus the Check Engine light may come on. It usually dries out quickly, but if the engine light stays on for more than a couple of days, have your service facility check it out.

Next, replace your windshield wipers.  They've taken a beating through the winter. New ones will have fresh rubber and you'll see clearly (and safely) out your windshield again.

Have your brakes inspected.  That salt doesn't do your brake's metal components any good.  Have a technician make sure your pads and rotors are clean and properly lubricated so they can stop you when you ask them to.

Speaking of wheels, it's a good time to have your tires checked, too.  Road debris and potholes can take a toll on tread and sidewalls. It may also be a good idea to have a technician check your alignment since you likely have hit something pretty hard on a patch of rough road at some time during the winter.

Make sure your tire pressure is appropriate for the rising temperatures. As the outside air warms up, your tire pressure climbs without you adding any air.  Make sure it's what the manufacturer recommends.

Finally, treat your vehicle's interior to a thorough refresh.  Those floor mats and carpets may be white with salt; clean 'em up.  Get rid of wrappers, drink lids, empty water bottles and anything else that's fallen down.  And if you need to, have your upholstery cleaned so it looks and smells new. A clean exterior is nice, but since you spend your time inside your vehicle, it'll feel even better when your cabin is sparkling fresh.

AutoChoice Service Center Inc.
2009 S. Yost Ave.
Bloomington, Indiana 47403
812-339-9898

Steer Clear of Power Steering Problems (Power Steering Maintenance)

We usually take our vehicle's easy steering for granted until something goes wrong.  Power steering is what makes it almost effortless to turn the steering wheel, aiming your vehicle in the direction you want to go. Without the assistance of power from the engine, steering would be a laborious process, so you want to make sure the system is working well.

Power steering systems are usually one of two types, hydraulic and electric.  The hydraulic type uses a pump that is driven by either a belt or an electric motor.  This system uses hydraulic fluid to create pressure that gives your steering the power assist.  Since that pump is always working, time and distance traveled eventually take their toll, and these systems need to be periodically inspected.  Also, while that hydraulic fluid can last for years, it should be replaced periodically as it degrades over time. Your vehicle's owner's manual contains the manufacturer's recommendations.

A technician can check for leaks in the hoses, pump housing or reservoir.  Also, the belts should be inspected and so should the pump, as these can fail.  Signs of a failing pump are a groaning noise when you turn the steering wheel, stiff steering, squealing noises when you first start your car and puddles of a reddish-brown fluid under your vehicle. 

The other type is called EPS, or electric power steering, which is becoming more commonly used in the latest vehicles.  It only delivers power assist when you need it and has an electric motor that supplies that steering help.  It's more efficient, accurate, compact and clean. And because it has a lot fewer components, it's easier to maintain. 

If you have electric power steering, you may notice sometimes it's hard to turn the wheel or your Check Engine light comes on.  Sometimes the power assist motor fails or there can be problems with electrical connections.  Any time you have symptoms, it's important for your safety and that of drivers around you that you have a technician check them out.

Properly working brakes are essential for the safe operation of any vehicle.  Stop! And make sure yours are working properly.

AutoChoice Service Center Inc.
2009 S. Yost Ave.
Bloomington, Indiana 47403
812-339-9898

I NEED All Wheel Drive (Pros and Cons of AWD)

So winter has arrived and you don't feel confident in how your 2-wheel drive vehicle does in the snow and ice.  You envy all those people with all-wheel-drive (AWD) and 4-wheel-drive (4WD) cars, trucks and SUVs.  You start thinking, "I need one of those.  I'll be able to go anywhere without any worries."  The truth is there might be another option for you that you might not have thought of. 

Sure, you've seen the ads that tout the advantages of AWD and 4WD, and some of the videos make it look like they can handle everything Mother Nature can throw their way.  The truth, though, is that vehicles with drive wheels at all four corners can't stop any more quickly than those with 2-wheel-drive.  Yes, AWD and 4WD vehicle have advantages when it comes to acceleration, but when it comes to stopping and handling, they generally don't. 

If you buy a new AWD or 4WD vehicle, you are going to spend thousands of dollars.  Maintenance and upkeep costs are higher due to the vehicle's increased complexity and weight, and you're likely to take a hit in fuel economy.  So, what's the option we mentioned above?  It's simple.  Winter tires. 

If you have a front-wheel-drive (FWD) vehicle with winter tires, you'll notice a tremendous difference in your winter traction and stopping than the all-season tires that are on most vehicles.  One tire company, Michelin, wanted to find out which was better in the snow: an AWD car with all-season tires or a FWD car with winter tires.  And they found while the AWD car could get going a little more easily, in most of the other comparisons, the FWD car with winter tires handled equally or better and stopped in a shorter distance.  The optimal combination would be, of course, AWD or 4WD with winter tires.  But one major consumer testing magazine found that only about 12 percent of their subscribers who drove AWD or 4WD vehicle in the snow for more than 6 days in the previous winter even used winter tires!

So a set of winter tires may give you the handling and stopping you're looking for and for a lot less cash than a new AWD vehicle.  Consult your service advisor for some recommendations.  You may be pleasantly surprised at how you can handle winter roads without having to handle a new, big, fat monthly payment for a new vehicle. 

AutoChoice Service Center Inc.
2009 S. Yost Ave.
Bloomington, Indiana 47403
812-339-9898