Steady or flashing. It matters.
This is the one piece of car knowledge we wish every driver had, so here it is with nothing attached to it. A steady check engine light means the car has recorded a fault and wants it looked at. A flashing one means an engine misfire is dumping raw fuel into the exhaust, and that will destroy a catalytic converter in a matter of miles.
What it usually turns out to be
On a steady light with no symptoms, very often the fuel cap or the evaporative system: a seal, a valve, a cracked line. It is one of the cheapest things on this list and it is also the most common reason a car fails emissions. Colorado testing reads that system directly.
How you’d know
Flashing, and the car is shaking
Pull over when it is safe and call us. Driving it is the expensive choice.
Steady, and the car drives normally
Make an appointment this week. It is recording something.
It came on after a fill-up
Check the cap is on tight and clicked. Sometimes that is genuinely the whole thing.
It went off by itself
The fault stopped meeting its trigger condition. It is still stored, and we can still read it.
Emissions test coming up
Bring it before the test, not after. A light on is an automatic fail.
What we do
Read and record every stored and pending code
Freeze-frame data: the conditions the car was in when the fault set
Test the named circuit before touching a part
Evaporative and vacuum smoke testing
Clear and verify. We road-test it so the monitors have a chance to run before it goes back to you
You get the number before the work starts, not after.
Call the shop and describe what it’s doing. If it needs to come in, we’ll tell you when to bring it.
Mon–Fri 8–6 · Sat 8–2Sun closed
| Monday | 8am – 6pm |
|---|---|
| Tuesday | 8am – 6pm |
| Wednesday | 8am – 6pm |
| Thursday | 8am – 6pm |
| Friday | 8am – 6pm |
| Saturday | 8am – 2pm |
| Sunday | Closed |