RE: Help Trouble shooting P0440 code po440 is a leak in your evap purge system check your gas cap first. then perform a leak test of the evap purge system should not leak down more than 5 mb over 1 min.

How do I fix trouble code P0440?

One of the most common causes of the P0440 code being triggered is a loose fuel tank filler cap, which can be fixed by either manually tightening the cap or replacing it if it’s damaged.

Is it OK to drive with a P0440 code?

The P0440 code is not an emergency code, as it doesn’t affect your ability to drive the vehicle safely. However, it may cause a dip in your fuel economy. If you’re nearing the time to take a new emissions test, the P0440 code will cause you to fail. Also, the vapors are flammable and dangerous to breathe.

What would cause a P0440 code?

P0440 can be caused by anything from a loose gas cap to a damaged hose to a leaking fuel tank. It’s impossible to give an accurate estimate without properly diagnosing the issue first.

Can a vacuum leak cause a P0440 code?

If your car’s computer determines a significant leak in the EVAP system, it will trigger code P0440.

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How do you fix an EVAP leak?

Simply pressurize the system and spray down EVAP system components with a soapy solution. A 50/50 solution of car wash and windshield washer fluid works well. Leaks will show up as bubbles or foam. (You can use the same solution to check for tire leaks.)

What can cause an EVAP code?

An EVAP trouble code could be caused by something as simple as a loose or worn gas cap, a leak in a hose, problems with a purge valve or even a rusty fuel filler pipe. When your Check Engine light comes on, bring your vehicle into Auto Select and let us check it out.

How much does an EVAP sensor cost?

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The average cost for fuel evaporative canister replacement is between $405 and $453. Labor costs are estimated between $91 and $115 while parts are priced between $314 and $338. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location.

How much does it cost to fix emission control system?

If your vehicle failed emission testing and it needs repairing, then the cost will depend on the exact cause, but the repair work typically starts around $200. Replacing your exhaust system depends on the type of car you drive, but that work starts at approximately $175.