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Opening Hours

Mon-Fri: 8AM – 4:30PM
Saturday: 8AM – 2PM

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Smog Checking

Smog Testing Station Near La Puente

Located just minutes from La Puente, in Covina, Sornoso Automotive Repair is a STAR-certified smog check and repair station. No appointment is necessary for a smog check. As a test and repair station near La Puente, we provide smog checks for foreign and domestic vehicles. All smog tests at Sornoso Automotive Repair require:

Emission control components inspection (visual)
 Ignition timing, check engine light, gas cap, exhaust recirculation system, and fuel
evaporation system inspection (functional)
On-board diagnostic system inspection
Tailpipe emissions inspection

Car Muffler

Most vehicles in California are required to have a smog check performed every other year. Both gas-powered and hybrid vehicles must be smog certified in keeping with California laws. Electric vehicles are not subject to smog checks. Specific laws apply to cars that are more than 8 years old, and vehicles that have changed ownership. Vehicles being registered in California from another state will also need to be inspected and pass a smog check at a smog testing station.

What Causes a Car to Fail a Smog Check?

Car Smoke

A variety of common problems may cause your car, SUV, or truck to fail a smog check. They include:

Broken or damaged oxygen sensor
Check engine light is on
Clogged, old, dirty air filters
Faulty spark plugs
Fuel injector leaks
Fuel metering malfunction
Fuel pump malfunction
Gas cap leak
Malfunctioning Evaporative Emission Control (EVAP)
Malfunctioning mass airflow sensor
Major engine problem
New battery or battery that has been recently jumpstarted
Problem with the catalytic converter

Most newer vehicles that have been properly maintained will successfully pass the smog check. If your vehicle doesn’t pass the smog check, Sornoso Automotive repair can help! Sornoso Automotive Repair is a full-service repair shop. We service all makes and models of foreign and domestic vehicles. No appointment is necessary for a smog test at our smog check. Bring your car, truck, or SUV in, at your convenience and we’ll complete your smog check quickly. 

Tips for Making Sure Your Car Will Pass a Smog Check

Regular maintenance, routine oil changes, tune-ups, brake service, and abiding by your manufacturer’s service recommendations will help ensure your car passes a smog check.
Other tips that will help include:

Get your oil changed a few weeks before your smog check.
Make sure you don’t have a check engine light on. If you do, have it repaired.
Drive your car for at least 15 minutes before your smog check to warm the engine temperature.
Put air in your tires if the air is low.

Mechanic Reading Maintenance Checklist

Get a Smog Check Today

Visit Sornoso Automotive today for a smog check, or for a tune-up, brake job, tire rotation, or oil change before your smog check. Be sure to take advantage of our current savings coupons! If you need help paying for auto repairs, we proudly accept Snap Financing.

Sornoso Automotive is located at 925 N. Citrus Avenue in Covina, just minutes from La Puente. Sornoso Automotive is open Monday – Friday from 8:00 am – 4:30 pm, and on Saturday from 8:00 am – 2:00 pm. Send us a message today or call 626-263-6191.


We are proud to announce that all our service technicians are ASE Certified.


Sornoso Automotive
925 N Citrus Ave
Covina, CA 91722-2736

Working Hours

Mon-Fri: 8am-4:30pm
Saturday: 8am-2pm
Sunday: Closed