Express Car Care of Denver

"Denver's Best Auto Repair and Quick Lube"

Check Engine Light

by

When your check engine light comes on, you may be torn between utter panic and just wanting to ignore it and hope it goes away.  That’s perfectly understandable.  That same check engine light could come on for anything from a serious engine or transmission problem all the way down to a loose gas cap.

There’s a very common misconception that the trouble codes stored in your engine computer will specifically identify a problem when the check engine light comes on.  This isn’t the case, it’s more like pointing to the symptoms of the problem.

Think of it like taking your temperature.  Say it’s 101.  Your heat sensor (the thermometer) tells you that your temperature is out of the normal range, but it doesn’t tell you why you have a fever.  You’ll need more information, more tests before you can diagnose why you have a fever.  A check engine light works in the same way.

For any given trouble code, there could be several causes.  So, your trained technician takes the trouble code as a starting point and begins a diagnostic process to determine the cause of the problem.  Sadly, some problems take longer to solve than others.

When your engine management system logs a problem and illuminates the check engine light, your service technician will plug in a scanner, download the trouble codes and go to work tracing the cause of the problem.

That’s only the first step.  This is when your technicians training, equipment, databases and skill get put to work diagnosing the problem and deciding the best way to fix it.

If your check engine light is flashing it means that the problem could lead to serious damage, don’t ignore it.  You should get to the service center as soon as possible and get the problem solved.  If it’s on but not flashing, you have some time to get your vehicle in at your convenience.

Come in and see us or give us a call if you have any questions.

Express Car Care Tech Question on Your Check Engine Light

by Leave a Comment

Express Car Care Tech Question on Your Check Engine LightExpress Car Care Tech Question:

I’m Alex.  My Check Engine Light came on in my truck and I’ve tried several things to make it go off but nothing has worked.  What should I do?

Express Car Care Answer:

Like Alex, most Denver car owners have experienced their check engine light coming on suddenly.  We get frustrated because we don’t know why.  Of course that’s perfectly understandable:  There are many reasons for the check engine light to come on – and there’s only one light.

Alex said she tried several things to get the light to go off – but it didn’t work.  Her goal was to get the light to turn off.  I would suggest that the goal should be to find out what caused the light to come on in the first place – and fix it.

You can search the internet and find millions of sites with tricks to get your truck engine light to turn off.  But what good does that do?  Whatever caused the light to come on is still wrong.  Not getting to the bottom of the problem can lead to other problems for Denver motorist – some minor and some more serious and expensive.

Your helpful Express Car Care service professional can get you started down the road of properly diagnosing the problem so you can have it repaired.  You can save yourself some time and frustration next time by having a professional diagnose the problem right away.

Check Engine Lights

by Leave a Comment

A question we often hear at our shop is “why is my check engine light flashing?”  There is not always a simple and quick answer to this question.

Check engine lights are a part of the computerized engine management system (ECM).  This system alerts us to possible problems inside the engine or transmission that have an impact on the emissions system.  Check engine lights may be a graphic of an engine or a similar icon.  It could also be words “check engine” or “service engine”.  Some vehicles use a yellow check engine light as a caution light that tells you to have your car checked soon and a red check engine light that means your vehicle needs immediate attention.  Every car’s display is different, so you should make yourself familiar with how your particular make and model works.  The check engine light is usually amber or red in color and has two stages, a steady engine light or a flashing check engine light.  A steady check engine light signals minor problems, while a flashing check engine light means there is a serious problem in the ECM.

The specific causes a check engine light flashes are different for each vehicle but these are some general causes.

  • A misfire in your engine.  A misfire can cause catalytic converter damage if you don’t resolve it quickly.  Replacing a catalytic  converter can be costly, so have the engine checked as soon as possible by a certified mechanic.
  • A failure in the emission control system.  The emission control system contains many active sensors that work to reduce the amount of pollution released into the air.  One of those sensors is an oxygen sensor that reads the air and fuel mixture.  If that mixture is out of the acceptable range the check engine light will flash.
  • Brittle, cracked or worn spark plugs.  Worn spark plug wires can lead to an electric misfire inside the engine.  If the wires are worn out, they should be changed as soon as possible.
  • A loose gas cap.  If the gas cap isn’t tight enough or twisted correctly it can cause the check engine light to flash.  Sometimes when the cap is put on correctly the check engine light will go off.  If the light stays on for more than a day or two have your mechanic run an on-board diagnostic to see if there is a code in the system indicating a more serious problem.

Check engine lights help you and your mechanic keep your vehicle running smoothly, so when they light up have your vehicle checked and don’t ignore them!

For all of your Denver Auto Repair needs, trust Express Car Care. Call (303) 691-2760 or stop by our shop today.

My “Check Engine” Light Is On, What Do I Do Now?

by Leave a Comment

You are  driving along enjoying the ride and suddenly the “check engine” light comes on and you say to yourself, what do I do now?  There is a good chance that the problem is simple and easy to fix but to err on the side of caution is usually best.My Check Engine Light Is On, What Do I Do Now?

Before 1981, the dashboard indicators on cars monitored basic problems, fuel level, oil pressure and the temperature of the engine.   In 1981 federal clean air statues were instituted that required catalytic converters on all domestic cars and trucks to help reduce the level of pollutants in the air.  The computer that performs this emission system is called an on-board diagnostic (OBD) computer.  Then in 1996 the government required automakers to upgrade to OBD II, this is a sophisticated system of sensors that conduct diagnostic emissions tests as you drive.  When the OBD II detects a problem, your ” check engine” light goes on and the computer stores a “trouble code” in its memory that identifies the source of the problem.  These codes can then be read with an electronic scan tool or a diagnostic computer, which is standard equipment in auto repair shops.  Once the codes are read, they direct your repair technician to the source of the problem.

A “check engine” light can signal many different things, something as simple as a loose gas cap to a seriously misfiring engine.  So what do you do now?  First of all, you should read your owner’s manual and be familiar with your cars gauges and indicator lights and the purpose of each of them.  Some lights are yellow to give  you a warning, and some are red, meaning  a problem needs immediate attention!  Know what your dashboard is telling  you! Look for indicators of a serious problem that might require quick action.  Check the dashboard for indications of low oil pressure or overheating.  If either of these conditions exists, pull over and shut off the engine as soon as possible!

If nothing serious is indicated, check your gas cap and make sure it’s tight.  Sometimes a loose gas cap can cause the “check engine” light to come on, but the most important thing is don’t ignore it.  It doesn’t always mean a big problem or an expensive repair is ahead, but driving with the light on could end up damaging expensive components and causing further damage to your engine.  Have your vehicle checked by a trusted mechanic as soon as possible when the light goes on. That way you can avoid any costly repairs and that little “check engine” light has done it’s job!

Brakes Service

Oil Change

Suspension

Transmision Service

Engine Service

Auto Tips & Tricks