Skip the auto shop - Our mechanics make house calls

Q: Check Engine light code P0430

asked by on

I am getting a Check Engine light code P0430.

Your vehicle has groups of sensors that take readings and report back to the engine computer to make adjustments, or report an error; in this case, we’re dealing with oxygen and/or air/fuel-ratio sensors.

The code P0430 indicates a failure in the system that measures the oxygen level in exhaust gases. It’s likely that your sensors have determined the catalyst to be at fault, unless there was an incorrect reading.

I would suggest having a mechanic, like the ones at YourMechanic, review the system data generated by the Check Engine light, and determine the location of the fault.

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: How many hours of labor could I expect for changing the oil gasket on a 2001 Lexus GS 350

Hi there: Removing an oil pan gasket is not as simple as it once was. On many modern vehicles, there are multiple sensors and other components that need to be removed in order to drain the oil and remove filter,...

Q: 2007 KIA Carnival 3.8L Petrol Automatic

This sounds like potentially a problem with fuel delivery or intake. I would recommend checking the mass air flow sensor to see if it is dirty or faulty as this can cause the hesitation or slowing you are describing. Also...

Q: need to change front wheel upper arm bussing/ what tolls do i need to use

Hi there: It's probably a good idea for you to purchase a 2004 Chevrolet Trailblazer repair manual. In this book, they will outline the steps needed to make major repairs such as replacing the upper control arm bushings; including which...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.