Skip the auto shop - Our mechanics make house calls

Q: Emission control leak.

asked by on

The Check Engine light comes on with code P0455, which means a leak in the emission control system.

This code may be caused by the canister purge solenoid is leaking or you did not tighten the gas cap. Either way the leak should be cleared first and do a physical inspection of the fuel system. Then to check for leaks with a smoke machine by a professional mechanic if nothing visual was found to be the cause. The smoke test may find the leak and then it can be fixed.

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: Jeep misfiring and stalling.

The code P0455 could be the gas cap is loose or leaking or a leak in the fuel tank venting system. Also a problem with a sensor or solenoid leaking in the system. The system would have to be tested...

Q: Brake booster replacement for 2005 Volkswagen Phaeton.

Hi there. You will have to remove the master cylinder and all of the engine components that are in the way of the brake booster. Then the bolts on the inside of the cab will need to be removed to...

Q: Engine management light

Hello, thank you for writing in. If the code that was pulled pertained to the spark plugs and ignition system, then the issue may be related to the spark plug wires rather than the plugs themselves. Thsee can be inspected...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...