Q: My car sounds like a go cart upon acceleration and the Check Engine Light is on - possible problem with the catalytic converter

asked by on October 21, 2016

My car just began sounding like a little go cart upon acceleration and it seemed to have less power in the gas pedal. A few minutes later the check engine light came on. Autozone diagnostic said read the catalytic converter had a problem. My question is, how easy is this to fix. Is it drivable for a period of time then will it leave me stranded if it becomes too bad? Is it actually the converter or something worse?

My car has 137000 miles.
My car has a manual transmission.

Check Engine Light is on Inspection $94.99 - $114.99 Get a Quote
Catalytic Converter Replacement $288.41 - $1959.69 Get a Quote

As you may know, the catalytic converter converts toxic unburnt fuel gases into less harmful gases that are released into the environment. When this is not working properly, these gases tend to back up in the exhaust system of your car, causing it not to be able to expel the exhaust properly.

This will cause your car to run very poorly as you have experienced. You may also experience very poor fuel mileage as a result. I would recommend having this looked at very soon by an expert, such as one from YourMechanic, who can determine why the Check Engine Light is on and replace the catalytic converter if needed.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Jerking and jumping
Hi, thanks for your question. This is a common symptom of a bad or failing mass air flow sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-mass-airflow-sensor). This is a component that regulates the amount of air that flows into the intake system of your car as...
Check engine light is flashing and reduces the power of the engine.
If the light is flashing then the computer system should have stored codes as to why the problem is happening. I recommend having the computer scanned by a certified technician, such as one from YourMechanic, to retrieve the codes and...
My engine is vibrating and making a knocking sound at idle, which grows intensely when I accelerate but it all goes away at times
This seems to be a torque converter issue. The bolts are probably loose between the converter and the flex plate. To get to the torque converter bolts, you will need to remove the starter from the engine and then you...
Car gets too hot before the fans come on.
This is a common sign of a faulty coolant temperature relay. This is a relay that monitors the temperature of the coolant and relays this information back to the computer which then uses this information to make many different decisions...
When my car starts I see my headlights and indash lights go dim.
A starter motor uses a lot of current and thus will cause a voltage drop at the battery. During the brief interval that a starter engages and runs, any other circuits that are also "on" could see the voltage drop...
Shaking
Shaking or vibration (https://www.yourmechanic.com/services/engine-is-shaking-pulsating-or-vibrating-inspection) may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) may cause the engine idle to drop below...
Clunking noise hear it at speeds of 35-40 loud
Hi There, What you are describing sounds like a bad or worn out ball joint. A ball joint is designed to pivot through multiple planes. Of course, because the ball joint constantly pivots at different angles, it tends to wear...
Hood won't open or close
There is a fault with the latch and/or the cable actuator. Hood misalignment, if severe, can cause this issue as well. The whole latch assembly and mechanism should be inspected for damage, cleaned and lubricated to resolve this. If you...

Related articles

A Buyer’s Guide to the 2012 Honda Accord
The The 2012 Honda Accord has a lot to offer. From great fuel economy to comfortable features and a sleek, modern look, it’s no wonder so many people love the Accord. Though, unlike the Civic, Honda has yet to offer...
2012 Honda Accord vs. 2012 Honda Civic: Which One Should I Buy?
The Honda Civic was the best-selling compact car as well as the third-best-selling car overall in 2012. With its unique blend of reliability, affordability and refinement, the Civic is a gold standard for transportation in general. While the Accord is...
The Best Used Cars to Buy If You're a Personal Trainer
As As a personal trainer, you either operate out of a gym, or you go to your clients. Either way, you probably don’t have to haul any more gear than what fits into your gym bag, so your main focus...