Q: there was a rattle, which just disappeared but was replaced by a catalytic converter light.... can I still drive?

asked by on January 13, 2017

there was a rattle on my car for a few weeks.. but the local garage couldn't find anything wrong. The rattle got worse, then seems to have stopped but now my catalytic converter light has come on!

My car has 63000 miles.
My car has a manual transmission.

I can’t say with any assurance whether it’s OK to drive without hearing the rattle myself. It really could be anything and I’d need more information. But I’m going to guess that your catalytic converter is coming apart on the inside. That would explain your subsequent catalyst code. When the catalyst has been very hot, or maybe if you bottomed the exhaust on a speed bump, sometimes the ceramic substrate inside the catalytic converter will break up. And the pieces roll around inside the housing sounding like so many rocks in the exhaust. They can become wedged and stop rattling for periods of time, but will eventually start again. Sometimes the pieces can get wedged together and block the flow of exhaust to the point that the engine begins to run poorly. You need to have the ECU scanned for more codes, because if the catalyst did indeed break up at such a low mileage, there might be some other problem that caused the engine to run too rich and the exhaust to get too hot. I suggest you contact Your Mechanic about having a technician come to your home or office to hook up a scan tool and tell you what is bothering your car. They could also listen to your rattle and give you a first hand appraisal of whether it is safe to drive your car

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

How do you use the sunglasses holder?

Your car is equipped with a handy storage area for your sunglasses. It’s located on the interior of the roof, just behind the rearview mirror. Using this area to safely store your sunglasses when they’re not needed is very simple....

What is reverse lockout on the manual transmission?

Manual transmissions have come a long way in recent years and now offer a number of features designed for both convenience and safety. The reverse lockout feature on your car’s transmission is a perfect example. Essentially, this is a setup...

How do I install a booster seat?

If your child is too large for a forward-facing car seat but not yet large enough to use the seat belt correctly, you’ll need a booster seat. Actually, your child will spend more time in a booster seat than in...

My 2012 Chrysler 300 won't run it says it's in drive like it's running but it's not and it won't turn off.

This may be a result of low transmission fluid or potentially a faulty transmission control module. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears. The transmission control module has various sensors such...

What does it mean if the message center shows a warning saying “Sensor blocked see manual?”

Your car has a significant number of sensors that play vital roles in a wide range of different systems. If you see the warning “Sensor blocked see manual” come across your message center, it’s natural to feel a little nervous....

How do I turn autolock on or off?

The autolock feature automatically locks your doors when your vehicle begins moving. This feature can be turned on or turned off by following these steps: 1. Press the Up/Down buttons on the steering wheel until Settings is displayed on the...

Oil pressure warning light flashing

Many engines, regardless of the mileage, will burn a little bit of oil over time. This is part of the reason that the manufacturers recommend changing your oil at certain intervals. If your vehicle was due for an oil...

How do I customize the Unlocked Door Anti Lock Out settings?

When the Unlocked Door Anti Lock Out feature is turned on, then the driver door cannot be locked when it is open. When the feature is turned off, the driver door can be locked when open, and will set the...

How do you lock the doors with the remote?

One of the best things about the remote with your car is that it lets you lock the doors from outside the vehicle. However, there are a few things you’ll need to know: Make sure that all doors are...

Related articles

A Buyer’s Guide to the 2012 Toyota 4Runner
The The 2012 Toyota 4Runner was made for people with an active lifestyle. Its design is made to be a light off road alternative to the Jeep Grand Cherokee and the Ford Explorer. Key Features The Toyota 4Runner has...
A Buyer’s Guide to the 2012 Infiniti M Hybrid
For For those who want a hybrid system that doesn’t sacrifice luxury, power or comfort, the 2012 Infiniti M Hybrid is a great option. With commendable fuel economy, a plethora of driver assistance features and a luxurious feel, you’d never...
A Buyer’s Guide to the 2012 Chevrolet Equinox
The The 2012 Chevrolet Equinox stands out in the small SUV class for its affordable price, its high-powered engine, and its plethora of features. While the Honda CR-V has led this class for years, the Chevrolet Equinox is positioned to...