Skip the auto shop - Our mechanics make house calls

Q: What kind of damage can a bad catalytic converter do to my vehicle?

asked by on

I was told that I have a bad catalytic converter and engine light is on, rattling nose, constantly pumping gas. How can it effect my engine? I was told it would cost over $2000 to fix it. Can I fix it myself? I started noticing that it has a hard time going up hills and my vehicle seems to get hot faster ( fogging windows).

My car has 200000 miles.
My car has an automatic transmission.

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!
  1. Home
  2. Questions
  3. What kind of damage can a bad catalytic converter do to my vehicle?

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

Get a quote

What others are asking

Q: My catalytic converter is gutted, with no engine lights on. Is this bad for performance?

Hello, thank you for writing in. The catalytic converter is there to remove certain emissions like CO and NOx before your exhaust is pumped into the environment. While this is the practical and "environmentally responsible" thing to do, your vehicle...

Q: I can't shift my car into drive or reverse.

Hello, the first thing to check on any car that has a transmission dipstick is to check the transmission level. If the transmission level is too low, the transmission won't engage in any gear. In a situation like this, don't...

Q: P0506

Diagnostic Trouble Code P0506 relates to engine controls. It's not clear from your inquiry if that code was already investigated and resolved but that code should be resolved prior to diagnosing the issue with the transmission. The noise and...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...