Q: Car won't pass smog check

asked by on January 27, 2016

My car won't pass the smog check. What do I need to do to get it to pass?

Hi there. Your smog check is measured as to how efficiently your vehicle is burning fuel and air. Smog is reliant on many different components. Your EGR valve, vacuum, and also your catalytic converter are factored in. I would strongly recommend to have a mechanic, such as one from YourMechanic, precisely diagnose the problems your vehicle is experiencing with failing smog requirements.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Possibly timing. 1998 Saturn SL2

Hi there - yes, it is possible that the engine has "jumped time". This engine is known for timing chain stretch, and jumping time with higher mileage. If you have spark, fuel injectors spraying, and compression, this could be the...

Putting back brakes on all new of course but now I can't get the drum back on. It's like something holding it back to slide on easy

Hello. A common problem when rebuilding rear drum brakes is that the brake cylinder has too much air or fluid in it causing the brake shoes to be pushed too far out. Then the brake drum won't go back on...

Car jerking and gas smell and loud noise

The most important issue is the fuel odor which signifies either a leak (vapor or liquid) or engine misfiring. A leak is potentially disastrous, especially if you park in an enclosed space such as a garage where vapors can accumulate....

Brakes stiff and loud

Hello. It sounds like you could have a couple of different problems. The brakes seem to be worn out and you have a possible problem with your brake booster. The ABS and traction light being on means that there is...

Car won't start. Got a new battery. Still won't start. Lights came on once I turned ignition everything died out.

A dead alternator will not prevent the engine from starting. As long as the car battery is FULLY charged and not defective, the battery alone provides all of the power required for ignition and starting. However, a dead alternator will,...

Why does my Engine sounds like a tractor.

Hey there. Your symptoms sound like many of your problems may be coming from a failed engine mount. The engine mount can fail and allow some extra movement of the engine and transmission assembly. To have this verified, a certified...

How do i turn off the auto door lock feature on my 1998 Silverado?

Hi there. With the ignition switch off grab the multi function switch and pull it towards you. Hold the switch and turn on the key to run two times. After you shut off the ignition switch, release the multi function...

Coolant is leaking

Hi there. There are many components that make up your cooling system. A water pump, thermostat housing, and hoses are all common places a vehicle will leak besides the radiator. A loss of excess coolant can cause your engine to...

Loss of power, likes to run hot and occassionally get close to overheating

Most importantly, you need to understand, that when the engine overheats and the coolant level gets low, the sensor that relays the temperature to the gauge is reading the temperature of the air in the engine. The sensor normally reads...

Related articles

A Buyer’s Guide to the 2012 Mitsubishi Lancer
If If you’re looking for a compact that delivers a sporty driving experience, the 2012 Mitsubishi Lancer just might be the right car for you. With a variety of models to choose from, including both a hatchback and high-performance option,...
How Is My Car Tested For Emissions?
Emissions Emissions testing is quickly becoming the norm across the US as more and more states and counties realize the need to control and monitor emissions and air quality. However, the process for testing emissions can be confusing (and it...
Symptoms of a Bad or Failing EGR Pressure Feedback Sensor
Common signs include engine performance issues like rough idle and decrease in power, failing an emissions test, and the Check Engine Light coming on.