Not-So-Common Sense (Sensor Failures)

So your vehicle won’t start.  What’s the first thing that comes to mind?  Battery dead? Starter motor worn out? Out of gas?  Well, those are all reasons that make sense.  But your vehicle may be refusing to start because one of its computers is being warned that to do so might damage it.  Here’s how that works.

You have lots of computers in your vehicle.  They need to know the status of things so there are several sensors monitoring various things going on.  These sensors send information to the computers that adjust the fuel and air mixture so you don’t waste fuel.  They know when things aren’t quite right and prevent you from starting your engine if that’s going to damage it. 

Other sensors make sure the coolant is the right temperature, check to see you are not polluting the air and make sure other electronic components are performing their tasks correctly.

Here’s an example of a sensor doing its job.  Your engine needs oil to lubricate metal components so the friction doesn’t damage them.  Your engine has an oil pressure sensor that tells a computer called the Electronic Control Unit (ECU) if things are good to go or if there’s something wrong, maybe the oil pressure is too low to keep things lubricated.  If it is, it gives a signal for the vehicle not to start, protecting the engine. 

Of course, the sensors can go bad, too, with some of the same results.  And so someone has to figure out if it’s the sensor that’s failed or if it really has detected a problem.  That is the challenge for technicians with specialized equipment to decipher the signs.  If a bad sensor is found, it may need to be replaced.  Sometimes a thorough cleaning can do the trick.  In either case, your service facility can track down the problem and get you back on the road.  Makes sense, doesn’t it?

Autotronics of St. Peter
111 Jefferson Avenue
St. Peter, MN 56082
507.934.9290
http://autotronicsstpeter.com

Recommended St. Peter Service Intervals

Everyone in St. Peter, MN, knows we are advised to go to our St. Peter dentist twice a year.  Oral-conscious St. Peter residents have a teeth-cleaning and examination. Once a year, we get x-rays to look for problems that can’t be seen with the naked eye. When our dentist is done, he/she tells us what was found – “Everything’s fine, see you in six months.” Or “You’ve got a small cavity starting, let’s schedule an appointment to take care of it.” By the time you leave, you have a plan for addressing any necessary issues.

This system works so much better than waiting for a painful problem before going into the dentist. Small problems are fixed before they turn into big problems. And you avoid those huge bills.

If St. Peter folks understand the wisdom of using this system for handling dental care, why do many resist when facing the same system for our vehicle maintenance?

Following the vehicle manufacturer’s recommended intervals can be confusing. First, there are recommendations for so many things: oil changes, transmission, coolant, air conditioning, power steering, brakes, fuel system, filters, belts, hoses, alignment, rotation, balancing …you get the point.

Every item has a recommended interval and it’s hard for St. Peter drivers to keep it all straight – even if you’re part of the 1% of MN drivers that read their owners’ manual.

And if you have more than one vehicle, the complexity is multiplied. You’d need a computer to keep track of everything. Well, that’s how your service center does it. For example, Autotronics of St. Peter subscribes to automotive databases that have your vehicle’s recommended intervals. You may have wondered how they know what else to recommend when you take your car in for an oil change – it’s all in the database.

Well, it’s not all in the computer. There are other variables that can’t be accounted for in the schedule: Things like St. Peter weather conditions, altitude, and where and how you drive in MN. Talk about these things with your service advisor at Autotronics of St. Peter and you may decide that the severe service schedule in your owner’s manual is more appropriate.

Since anything that’s not driving in moderate weather is considered severe and most of us do at least some of that around St. Peter, MN, it should be taken into account.

Let’s take your basic oil change as an example. What issues are involved? The oil you put in your vehicle is a blend of base oil and special additives. There are detergents to clean the inside of your vehicle engine and corrosion inhibitors. A good quality motor oil will not only lubricate your engine, it will help it stay clean inside and run cooler.

Now, these additives deplete with use and time. That’s why most vehicle manufacturer’s maintenance recommendations include both a time and mileage element – like 3 months or 3,000 miles/5,000 km, whichever comes first.

It’s easy for St. Peter drivers to think, “Gee, I’ve only driven 2,000 miles/3,200 km in the last 3 months. I can wait on that oil change.” But you need to remember that the inside of your engine is a environment. The oil is contaminated with combustion by-products that start degrading its effectiveness even when it’s just sitting there.

A lot of people in St. Peter don’t realize how harmful it is to skip an oil change. There are a lot of metal parts moving around in your engine. Small bits of metal wear off and are floating around in your oil. They can be carried to more delicate areas of the engine where they cause damage. Your oil filter is designed to trap metal particles and other dirt, but if it’s clogged up because you haven’t changed it, it can’t trap any more.

Oil sludge is another problem for St. Peter vehicles. Sludge is oil that has turned to a gunky jelly – think ‘Vaseline.’ Obviously, sludge doesn’t lubricate. It can also clog small oil passages so that all the parts don’t get properly protected by the oil. That’ll lead to premature wear.

If you’ve missed some oil changes, don’t despair. Just talk with the pros at Autotronics of St. Peter. Fess up – you’ll feel better. And they can help you get back on track. Following recommended intervals is the key to keeping your vehicle on the road and avoiding repairs.

Autotronics of St. Peter
111 Jefferson Avenue
St. Peter, MN 56082
507.934.9290
http://autotronicsstpeter.com

 

 

It Wears on You (Tire Rotation)

If someone told you there was a fairly inexpensive way to improve your vehicle’s handling, fuel economy and extend the life of your tires, you’d probably ask, “What do I have to do?” The answer is to rotate your tires.  But you have to do it regularly.

A lot of drivers think skipping tire rotation is a way to save money.  But when you don’t rotate your tires, they will almost certainly wear unevenly.  That’s because when your tires touch the surface of the road, the friction and traction causes miniscule parts of the rubber to come off.  And that process isn’t exactly the same on each corner of your vehicle.  Some vehicles have the drive wheels in the front, some in the rear and some on all wheels.

Rotating your tires at regular intervals minimizes the differences in the way the tires wear.  The amount and pattern will be spread out equally if your tires spend time at all different positions.  The more even the wear, the more consistent traction, handling and braking will be.  All four tires will last longer this way, and when it is time to replace your tires, they’ll all be worn out the same so you can replace all four with the same model tire.

Some people who choose not to rotate their tires find that one or two will wear much faster than the others, and often they’ll replace just the worn ones.  While you can find similar tires, they won’t all be the same and will certainly not have the same amount of wear. 

There are different tire rotation patterns depending on several factors: front-wheel drive, rear-wheel drive, all-wheel drive, directional tires/wheels, different sized wheels/tires on front and rear axles.  Also keep in mind that when your tires are new, some tire manufacturers require you to rotate them or else they won’t honor the warranty. 

Your manufacturer recommends intervals for tire rotation, so it’s best to follow their suggestion.  Your vehicle service facility can advise you when you need to get your tires rotated.  And many facilities include free tire rotation for as long as they’re on your vehicle if you buy your tires at their shop.

Autotronics of St. Peter
111 Jefferson Avenue
St. Peter, MN 56082
507.934.9290
http://autotronicsstpeter.com