Skip the auto shop - Our mechanics make house calls

Q: Problem with emission control code P0440 Check Engine Light. Is that a major problem and how do you fix?

asked by on

is this a major fix where is the value located to fix?

My car has 1043270 miles.
My car has an automatic transmission.

A: Hi there, A P0440 code is stored for an e...

Hi there,

A P0440 code is stored for an emission related fault; evaporative emission control malfunction. The evaporative emission system is responsible for preventing the release of fuel vapor into the atmosphere. When there is a fault in the system, it sets a corresponding code. This code could be the result of a mechanical or electrical malfunction. Electrical being a fuse, wiring, vapor sensor, or switching valve fault. Mechanical being a switching valve, mechanical valve, or a simple gas cap fault. This will not affect the vehicle’s performance, but needs to be addressed especially if you live in an area that performs emission inspections. Your mechanic has several available technicians to assist you with a Check Engine Light inspection and provide you with a detailed estimate and direction of repair.

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

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 car is a Nissan Navara. My Check Engine Light is on and my acceleration is not well.

Hi there. It seems that the engine you have is a diesel engine. The code P2002 is coming up for the particulate filter and it has an efficiency issue. The only thing to do with this is replace the particulate...

Q: My car want accelerate and my engine light is constantly blinking on and off

Hello. A misfire under load is typically caused by a problem in the secondary ignition system (i.e. plugs, wires, coil pack). This will also cause your Check Engine Light to flash. The powertrain control module (PCM) directly controls coil operation,...

Q: Squeaking in front right tire

Hi. The sound you are hearing is probably the wheel bearing. Every time you step on the brake you center the rotor, which is connected the the hub and bearing, stopping the noise. If you need further assistance, I recommend...

Related articles

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...