Skip the auto shop - Our mechanics make house calls

Q: Bought it yesterday. Check engine light is on

asked by on

So i bought this vehicle yesterday, as is no warranty. Check engine light has just popped on, went to autozone and their reader said the catalytic converter is getting clogged. I read that a faulty spark plugs can be the problem, and the dealer told me they had just replaced them a couple days before hand. Is this most likely the problem?

My car has 107000 miles.
My car has an automatic transmission.

A: The most common reason for that fault to be...

The most common reason for that fault to be set in this particular car is unfortunately a failed catalytic converter. Misfiring, which can be caused by faulty spark plugs or ignition coils, can cause damage to the catalytic converter, which in turn sets this fault. My suggestion is that you have the code diagnosed by a qualified independent technician, such as one from YourMechanic, and understand that you may need to have the catalytic converter replaced. If you just bought the car from the dealer though, because that is an emissions item, depending on what state you're in, you may potentially be able to return it because it can't pass SMOG check with a failed catalytic converter.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car has low power

Hello. The most common cause of this is low fuel pressure caused by a dirty fuel filter. If that has not been replaced recently, then I would typically start with that. I would also scan the computer for codes to...

Q: Warning signs of a bad fuel pump. Like sputtering when idle. Bad fuel efficiency. Shaking when at higher speeds. Less acceleration

This may be related to many different things such as: a bad fuel pump, dirty fuel injectors, a clogged catalytic converter, a faulty O2 sensor, or a bad mass air flow sensor. Unfortunately, there are many possibilities that can cause...

Q: Car fob will not chirp when locking vehicle. I pressed lock button twice and panic button works fine. Please help!!!

Hello. Typically if the horn will no longer chirp when locking the vehicle it is because the control module has lost its programming or there is a problem with one of the door switches. If you are getting a door...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.