
$20 off
check-engine diagnosis (diagnosis charge)
Applies to the diagnosis charge. Good through . One coupon per visit; not combined with other offers. Mention or show this coupon when your estimate is written — honored for walk-ins and phone customers too. Many repairs involve additional parts or labor at extra cost; your written estimate shows the total before any work. Encinitas STAR Smog & Auto Repair · 310 Encinitas Blvd #B, Encinitas, CA 92024 · BAR license #300634 · (760) 753-1000.
Check engine light on in Encinitas? We find the actual cause instead of just reading a code, then give you a written estimate for the engine repair. Because we're also a STAR-certified smog station, a light that's keeping you from passing smog can be diagnosed, repaired and retested here. Book online or call (760) 753-1000.
The check engine light is the engine computer telling you it saw something outside normal limits. It might be minor, like a loose gas cap, or it might be a misfire that can damage the catalytic converter if it's ignored. A code tells us where to start looking. It doesn't tell us which part failed.
- 4.9★ · 1,948 Google reviews
- ASE-certified technicians
- Written estimate before any work
- Walk-ins welcome
Signs your engine needs attention
- Check engine light on and steady
- The engine computer stored a fault. Get it checked soon; it can also cause a smog failure.
- Check engine light flashing
- An active misfire. Reduce driving and have it checked promptly to avoid damaging the catalytic converter.
- Rough idle or shaking
- Usually a misfire, traced to ignition, fuel delivery or a vacuum leak.
- Hesitation or loss of power
- Fuel, air, ignition or sensor problems.
- Fuel economy dropping
- A sensor, ignition or fuel system problem the computer is compensating for.
- Hard starting
- Fuel delivery, ignition, or a sensor problem, if the battery and starter test fine.
- Knocking, ticking, or smoke from the exhaust
- Internal wear, low oil, or the engine burning oil or coolant.
How check engine light diagnosis works here
Inspect
We scan for stored codes and freeze frame data, which shows the conditions when the fault set. Then we test: live sensor data, ignition and fuel checks, smoke testing for vacuum and evaporative leaks, and whatever else the code and symptoms point to.
Explain and estimate
We tell you what failed and how we confirmed it. You get a written estimate for the repair.
You approve
Nothing is repaired without your OK.
Repair
We do the approved repair, from sensors, ignition parts and vacuum leaks to larger engine work.
Road test
We clear the codes, drive the car to confirm the problem is gone, and recheck the system.
A code is a starting point
A code like "lean condition" or "misfire" can have several causes. Replacing the part named in a code description without testing is how drivers end up paying for parts that didn't fix anything. Testing takes a little longer and costs less in the end.
Engine repair after diagnosis
Once we know the cause, we handle the repair: ignition components, sensors, vacuum and intake leaks, gaskets and seals, timing components, cooling-related engine problems, and tune-up work. If it's major internal damage, we explain your options plainly.
Check engine light and smog
A lit check engine light can keep a car from passing smog. After a repair, the car's self-tests (readiness monitors) also need to complete through normal driving before the smog check, which can take some driving after the repair. We'll tell you what to expect for your vehicle.

Why customers choose us
We test before we replace.
You pay for the repair that fixes the problem, not for guesses.
Test and repair under one roof.
We're a STAR-certified smog station, so diagnosis, repair and the smog retest can all happen here.
Makes we service
- Toyota
- Lexus
- Ford
- Honda
- Jeep
- BMW
- Subaru
- Mercedes-Benz
- Chevrolet
- Nissan
- Mazda
- Volkswagen
- Acura
- Hyundai
- Kia
- Dodge
- Porsche
- GMC
- Audi
- Cadillac
- Volvo
- Mini
- Land Rover
- Infiniti
Recently in our bay: Toyota Prius, Toyota RAV4, Subaru Outback, Jeep Wrangler, Toyota Camry, Honda Civic, Jeep Grand Cherokee, Toyota 4Runner, Volkswagen Passat, Ford F-150.

What customers say
5 out of 5 stars
"I have brought both of my vehicles here. Something different for each one. They always were quick to diagnose the issue. Very professional and always did a great job. Which is why I continue to come back and always will."
5 out of 5 stars
"Always fast, friendly and trustworthy! Always appreciate the assistance with all things smog and check engine related."
5 out of 5 stars
"Great service. Reliable, quick and honest. Diagnosed some issues in my 4 runner that others missed. Thanks again! Will be back."
Frequently asked questions
Can I drive with the check engine light on?
If it's steady and the car drives normally, it's usually OK to drive it in for a check soon. If it's flashing, or the car is running badly, reduce driving and have it checked promptly.
Can a loose gas cap turn on the check engine light?
Yes. A cap that isn't sealing can set an evaporative system code. Tighten it; if the light stays on, have it checked.
Will my car pass smog with the check engine light on?
A lit check engine light can cause a smog failure. We can diagnose and repair the cause, then perform the smog check.
Why can't I smog the car right after a repair?
The engine computer runs self-tests during normal driving. After a repair or a battery disconnect, those tests need to finish before the smog check. We'll tell you what to expect.
Do you do tune-ups?
Yes. Engine tuning and tune-up work, such as ignition and filter service per your maintenance schedule, are part of what we do.
Location and hours
| Day | Hours |
|---|---|
| Monday | 8 AM–5 PM |
| Tuesday | 8 AM–5 PM |
| Wednesday | 8 AM–5 PM |
| Thursday | 8 AM–5 PM |
| Friday | 8 AM–5 PM |
| Saturday | 8 AM–4 PM |
| Sunday | 9 AM–4 PM |
Encinitas STAR Smog & Auto Repair
310 Encinitas Blvd #B, Encinitas, CA 92024
(760) 753-1000
Encinitas STAR Smog & Auto Repair · 310 Encinitas Blvd #B, Encinitas, CA 92024 · BAR license #300634 · (760) 753-1000
Check engine lights come in from Old Encinitas, Village Park, Carlsbad and Solana Beach.
Get your check engine light diagnosed
Bring it in or book a time. We'll find the cause and give you a written estimate.
$20 off
check-engine diagnosis (diagnosis charge)
Applies to the diagnosis charge. Good through . One coupon per visit; not combined with other offers. Mention or show this coupon when your estimate is written — honored for walk-ins and phone customers too. Many repairs involve additional parts or labor at extra cost; your written estimate shows the total before any work. Encinitas STAR Smog & Auto Repair · 310 Encinitas Blvd #B, Encinitas, CA 92024 · BAR license #300634 · (760) 753-1000.