Skip the auto shop - Our mechanics make house calls

Q: Catalytic shows not ready

asked by on

I've been trying to get a smog done but my catalytic is not ready and some misfire. How can I pass my smog if the problem is still the same and my engine light keep flashing?

My car has 165 miles.
My car has an automatic transmission.

Hi, thanks for writing in. The blinking light means you most likely have a misfire in one or more cylinders from an oil leak, from the valve cover getting on spark plug boots and shorting the cylinder out. The valve covers may need to be replaced, and the plug wires and plugs fixed. After these steps, the codes and monitors should be cleared our and you can pass the smog check. Hope this helps and best of luck!

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: The car idles and stalls in cold weather conditions only, or if i don't heat it up all the way in cold weather conditions.

Hello there. Many common faults will cause your 2012 Mazda 3 to idle poorly and stall in cold weather. The most common faults would be the coolant temperature sensor, stuck open thermostat, radiator, water pump, MAF sensor, or a wiring...

Q: How to reset worn brake indicator

You will have to replace the brake pad sensors when you replace the worn out brake pads. The light will then will go out on its own. If the light does not go out, then you have a short in...

Q: Vehicle Overheating

Hi There, Overheating can be caused by a few different issues, such as low coolant levels, a faulty thermostat, clogged radiator or possibly a bad coolant fan switch. As you may know the coolant fan switch helps to maintain the...

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...
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...