Q: Catalytic converter or O2 sensor need replacing

asked by on

The Check Engine light in my car came on. When I had it checked at AutoZone, the printout stated that it could be the catalytic converter or the O2 sensor needed replacing. When I try to crank it, it sounds like something is clogged. The other day, the car wouldn't start and I had to get a jumpstart to get it started.

From what you are describing it is possible the catalytic converters might need to be replaced. Before replacing them a back-pressure test should be preformed to verify that they are in fact faulty. After replacement, a verification that your engine is in good working order is also important because a misfire will dump raw fuel into the exhaust and quickly ruin your new catalytic converter. I recommend having a certified technician diagnose the Check Engine Light to make sure every gets fixed in working order.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Catalytic converter or O2 sensor need replacing

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: Q: Car starts, but then stalls

Low fuel pressure caused by a dirty filter may offer enough fuel for a start but not enough volume to support idle. Have an experienced automotive technician, such as one from YourMechanic, diagnose why your car is starting and stalling...

Q: How much does a shift solenoid cost? or sensor or the connector cost?

Your vehicle is equipped with a 4T65-E transmission. There are several solenoids in the 4T65-E transmission and the cost to replace will depend on how many are defective. However, prior to replacing anything the solenoid(s) must be tested (if they...

Q: Q: Car not accelerating

Hi there. The two most common causes of this vehicle not accelerating are either a transmission failure or a clogged catalytic converter. If the engine seems to just lack power, then it may be the converter. If the engine power...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.