Skip the auto shop - Our mechanics make house calls

Q: Catalytic converter replacement

asked by on

I brought my car to a mechanic for a tune up. Everything was running good and no check engine light. Now all of a sudden I have to replace my catalytic converter and my check engine light is on. Did the mechanic mess up my car or is it a problem that I caused

My car has 170000 miles.
My car has an automatic transmission.

A: Hello. It’s quite possible that there is no...

Hello. It’s quite possible that there is no one at fault here. It may just be unfortunate timing. I’m assuming that you have had the codes read and that is why you have decided you need to replace the catalytic converter. If there were no codes present other that catalyst efficiency, then it might just be normal wear and tear.

If there were any misfire codes or other problems before the tune up, driving it in that condition may have lead to a catalyst failure, but 170,000 miles is not really a premature failure. Many cars need to have at least one catalyst replacement before they reach 200,000 miles. YourMechanic can send a technician to your home who can replace your catalyst and advise you further as to what other conditions may exist.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: My 745li won't stay in gear.

Hi there. The computer (ECM) is locking out the transmission from engaging a drive mode. When this happens, something inside the transmission has failed, like a solenoid or the pump pressure is low. Check the transmission fluid and make sure...

Q: I need to know what I need for my car to get a tune up.

The basic tune up will include replacing spark plugs, fuel filter and pcv valve. Then checking the air filter and replace if needed. You may want to also check coolant for need of replacement. The spark plug wires should be...

Q: Low coolant level warning

Hello. If the coolant level shows low when the coolant is cold, and then reads fine once it warms up, then most of the time this is due to a bad coolant level sensor. This is assuming that the coolant...

Related articles

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...