Q: Check engine light is on with code P0440. Also the car makes noise

asked by on

Check engine light is on with code P0440 and the car makes noise. What should be done to fix it?

My car has 165000 miles.
My car has an automatic transmission.

Hi there, thanks for writing in. This code is for a leak or failure in the evap emissions system. By far the most common cause of this is a bad gas cap. If the seal on the cap is bad then this will occur. It can also be caused by a leak in any number of the parts contained in the system I usually will do a smoke test of the evap system to identify any leaks or any valves that are not closing. Those would need to be repaired and the system reset to fix this. The cost will really depend on what is wrong with the vehicle. If you would like help having this P0440 code repaired, consider YourMechanic, as a certified mechanic can come to your home or office to inspect the check engine light for you and repair this.

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. Check engine light is on with code P0440. Also the car makes noise

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: Why is my car making a whining noise in the low gears

Hello. Most of the time when this noise occurs when you first start moving and gets louder as you drive it is due to a failure in one of the thrust bearings in the transmission. If the transmission fluid has...

Q: My key fob will not open my car doors or trunk. I inserted a new battery in the fob and that did not help. What cld be the proble

Based on your description, I believe that the first issue is the lack of programming for your new key fob. If the dealership told you that the key requires programming and that was not done, this is the reason that...

Q: What causes the ignition relay fuse to pop when key it's turned to the start position

Hello - You likely have a shorted coil or ignition module. One of the ignition components is pulling too much current blowing the fuse. Check the coils and ignition module for shorts or other conditions drawing too much current. I...

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...
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.