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Emissions and Smog Testing

Working Hours
  • Mon 8:00AM - 5:30PM
    Tue 8:00AM - 5:30PM
  • Wed 8:00AM - 5:30PM
    Thu 8:00AM - 5:30PM
  • Fri 8:00AM - 5:30PM
    Sat 8:00AM - 2:30PM
  • Sun Closed

Emissions and Smog Testing

At Chendo Auto Center, we help our La Puente customers' cars run as cleanly and efficiently as they possibly can. We provide a range of emissions testing services to ensure that your car is running and driving its best, as well as complying with all local smog regulations. Should a problem arise with any of your vehicle's emission systems, we provide the parts and expertise to get you back on the road. Chendo Auto Center can replace mufflers/catalytic converters, refill diesel exhaust fluid, and make sure the full range of filters in your vehicle's exhaust system are working perfectly.

Regulators understand that older cars simply can't meet modern emissions standards without extensive modifications. For newer cars however, passing a smog test is a requirement of road legality. Call us at 626-813-9166 to learn more about the emissions requirements for your vehicle.

Emissions testing (also known as smog testing) is a vital part of the maintenance of your vehicle. E-tests provide your mechanic with important information about your car's engine and exhaust system. If important components, like your car's catalytic converter aren't working properly, the car isn't running as it was intended to by the manufacturer. Inefficiency costs you extra money in fuel and does unnecessary harm to the planet. Emissions testing can also affect the value of a vehicle you're trying to sell; while you can still sell a car without a valid e-test certification, you'll get more money for one that has passed the test.

There are several reasons that a car may fail its emissions test. There may be a problem with the vehicle's fuel system adding too much fuel to the air-fuel ratio required for proper combustion within the cylinders of the car's engine. This is known as "running rich" and results in the smell of gasoline from fuel passing through the engine and exhaust system without being fully burnt. Causes of this issue range from faulty fuel injectors to issues with the engine's control computer. There may also be problems with oxygen sensors or the vehicle's ignition system. At Chendo Auto Center, we use a complete set of diagnostic equipment to determine the problem and fix it quickly, explaining every step of the process to you, our valued patron. Call us at 626-813-9166 or send us an email to arrange a health check for your car's emissions system today!

What People Say About Us


  • -Stephen O.

    I've been to Chendo's twice. Once to fix a broken fuel pump and another to service my transmission. Both times I was very happy with the price and the work done. I've started recommending Chendo Auto Center to my family now as a result.


  • -Craig B.

    My family has been using these guys for years. They are honest, reliable,friendly and give sound advice. Even though we have moved to Duarte/Monrovia we still go to Chendo!


  • -Amber B.

    I had a really disturbing leak from my car transmission. I left it in Chendo Auto Center and after they finish with my car, there was no leaks, no problems at all. Fast transmission repair! This is the best transmission shop in the area. Thanks a lot!


  • -Kendra H.

    Perhaps the best transmission repair you can get in La Puente CA . I am so glad that I have found them. Transmission shop from high class!

Call us for service: 626-813-9166

AAA (American Automobile Association)
AAA Approved Auto Repair
CA State Smog Inspections
CA Certified Brake and Lamp Inspection Station
  • Car Care Aware