How does LHM Used Car Supermarket "diagnose" my problem?

The Check Engine Light (CEL) is never good news. At the very least it means you'll need to service the engine soon or check some of the auxiliary systems. You may want to ignore it, but the light means there's a problem that will only get worse the longer you leave it unchecked. Here at Larry H Miller Used Car Supermarket, we're pretty familiar with the light, so give us a call today to schedule an appointment to have it diagnosed. We will scan the code for free and give you a better idea on what it means and an approximate cost to repair it.

Servic Menu ItemLarry H Miller Used Car SupermarketJiffy LubeMidasEinsteins Oilery
Oil Change (Conventional Oil)$36.95$41.99$24.99$41.99
Tire Rotation$16.95$29.95No ChargeNot Available
Differential Service (Most Models)$79.95$79.95$89.95$79.95
Brake Pad Replacement$159.95$249.95$169.95Not Available
Balance 4 Tires$39.95Not Available$49.95Not Available

Here at Larry H. Miller Used Car Supermarket Boise, we have the tools, training and technology to handle diagnostic issues, such as a Check Engine light. Properly performing a complete diagnostic procedure normally includes the following steps:

  1. Retrieve Data: A diagnostic tool connects to the vehicles' on board computer to review error codes. This gives us a general idea of the system that may be failing/malfunctioning. 
  2. Verification Testing: This test determines if the physical test matches the digital test.
  3. Pinpoint Testing: This entails inspecting specific components for failure. This result gives the tech a very specific results so he or she knows exactly what the problem is.
  4. Research Technical Service Bulletins: Indicates if the problem is part of a "pattern failure." A pattern failure is a known issue that occurs with a particular type of vehicle. This does not eliminate the need for testing as other systems must meet specifications before a service bulletin procedure should be performed.
  5. Suggest Necessary Vehicle Repairs: Sometimes we find your vehicle needs other repairs while we're doing your diagnostic. We'll tell you what we found along with a recommendation. You'll tell us what you want fixed.
  6. Car Repair: We will perform necessary fixes including replacing parts, cleaning components, or performing updates.
  7. Verify Repair: Once all necessary actions have been taken, the vehicle must be retested to verify that the repair is complete and has achieved the proper results.

Is the Check Engine Light flashing?
If the light is steadily lit, that means that one of your engine sensors picked up suspicious reading. This can indicate a problem with an engine component, or with one of the sensors. You can still drive with the light illuminated, but you should get it checked out as soon as possible. If the light flashes, that means you need to pull over immediately as your vehicle has a serious issue that could cause imminent damage.

Warning Lights: Diagnostic Service
"Why is my check engine light on?"  This is a common question our customers ask. Generally it means the engine has run a self-test and has found that something isn't working like it should.  What should you do about the check engine light?  The best answer is to get it looked at as soon as possible. The longer the light stays on, it's likely that your problem is going to get worse.  

What makes a warning light come on?
Today's vehicles are manufactured with a multitude complex inter-related systems. On-board computer systems continuously monitor and store detailed diagnostic information about the performance of these systems. A warning light comes on because the computer received a signal from one of the systems or components that exceeded its normal operating range. The computer then sends a signal to turn on the light to let you know something is wrong!  (That's some fancy technology, huh?)

Some of the most common causes for a check warning light are: 
  • Not properly tightening your gas cap
  • Transmission issues
  • Ignition problems of some kind
While warning lights can go on and off the car still appears to be driving "fine", ignoring some lights can lead to serious issues, such as engine damage or other component failure. In some instances, this can be a safety hazard. That's why it is recommended to be safe (give yourself peace of mind) and have your car looked at by a certified professional as soon as possible. 

How long will it take to diagnose my problem?
In most cases, we can actually find and fix the problem in the same day.

Do I need an appointment?
Usually quick look ups do not require an appointment, but to ensure the quickest diagnosis possible it is best to come in for an appointment.  Schedule your appointment online by clicking here.

How much will it cost?
Most basic diagnostics (hooking up to computer and spot-checking) is done at no charge.  However, if additional and more thorough diagnosis is required, we will perform diagnostics at our fixed hourly rate.

Check Engine Light Question?

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Service Hours

  • Monday 8:00AM - 6:00PM
  • Tuesday 8:00AM - 6:00PM
  • Wednesday 8:00AM - 6:00PM
  • Thursday 8:00AM - 6:00PM
  • Friday 8:00AM -6:00PM
  • Saturday 8:00AM -4:00PM
  • Sunday Closed
  1. LHM Used Car Supermarket Boise

    9380 W Fairview Ave
    Boise, ID 83704

    • Sales: 877-803-4396
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