Duncan's Automotive
7366 Auburn Blvd Suite 3, Citrus Heights, CA 95621 916.726.8473

Engine and Exhaust

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Why did my vehicle fail its emissions test?

We all want to breathe clean air and keep our planet green.  One of the ways to do that is by requiring all vehicles with internal combustion engines to pass an emissions test.  That’s...
Published on: Feb 02, 2025

Making Sense of the O2 Sensor (Oxygen Sensor Replacement)

As you know, today’s vehicles rely on a lot of computers in them to keep them running clean and efficiently.  Those computers depend on information delivered by several sensors throughout t...
Published on: Dec 15, 2024

Catalytic Converter Replacement

Many of us have become aware of how important it is to keep our planet’s air clean, and your vehicle has a key component that helps do just that: the catalytic converter.  It’s in the...
Published on: Mar 02, 2024

PCV Valve Replacement at Duncan's Automotive in Citrus Heights

The PCV valve is a little, inexpensive part that does a big job for Citrus Heights and our environment here in CA. PCV stands for Positive Crankcase Ventilation. The crankcase is the bo...
Published on: Jul 22, 2023

The Test Your Vehicle Can Fail (Emissions Tests)

Clean air quality is something that helps all of us thrive here on Planet Earth.  And considering that motor vehicles are a contributor to air pollution, emissions tests in the U.S. and Canada ar...
Published on: Jun 19, 2023

Exhaust

We’ve all heard a car or truck that needs a new muffler.  But there’s more to the exhaust system than just the muffler.  The exhaust system has three main functions: To safel...
Published on: Apr 25, 2022

Exhaust Service at Duncan's Automotive

Driving around Citrus Heights, we've all heard a car or truck that needs a new muffler. But there's more to the exhaust system than just the muffler. The exhaust system has three main functions: Sa...
Published on: Jul 14, 2021

EGR Valve

It is pretty amazing how auto makers have been able to consistently build more powerful engines in vehicles that get better fuel economy while at the same time meeting increasing environmental standar...
Published on: Oct 18, 2020