Q: Emissions Systems code P0456.

asked by on January 14, 2016

I am getting Engine Light code P0456.

Oil/Fluid Leak Inspection $79.99 - $89.99 Get a Quote

This fault code indicates a very small leak in the evaporative emission system. This is usually a failure in the integrity of the evaporative emission system and not something simple such as the fuel cap was left off (that would trigger a large leak code). Looking for broken or cracked lines in the evaporative system or a partially open purge or tank venting valve, maybe even a fuel filler cap with a faulty seal could all be issues. One strategy to find these small leaks is the use of a smoke tester that will put low pressure smoke into the evaporative system to locate a small leak. You may want to enlist the help of a mechanic, like one from YourMechanic, who has the training and equipment to locate the source of the leak and to carry out the repairs to prevent this fault from returning.

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

What others are asking

Code P2562

Hey Davon. I'd recommend reading this article on the P2562 OBD-II trouble code, as it will provide you with some great information on the cause of this code, possible sources and repair solutions. I'm not sure cleaning the turbo alone...

Every 500 miles, 'check engine' light comes on and oil has to be added

Hello. It is common for this engine to consume oil as it ages. Typically the oil consumption comes from the valve stem seals. The only way to repair it is with rebuilding the cylinder head. I usually will look into...

Emergency brake locked up

This is a common problem for your vehicle. The emergency brakes in your vehicle are built into the rear calipers. Over time, corrosion will bind up the mechanism inside the caliper and will not allow the brake to release. The...

My Check Engine Light is on after the fuel tank overflowed

When the fuel overflowed, the fuel system most likely caused the vapor recovery and tank vent to become flooded with liquid fuel. This flooding of the vent system may cause the computer to sense a problem in the fuel tank...

After transmission replacement, trouble starting car

If you had the transmission recently replaced, then you may have an issue with the ground cable connection at the transmission connection being loose, or the starter cable is loose. If neither of these issues are happening, then you...

Check engine light flashing occasionally

Hello. It is possible that you will need to have your car tuned up again. During this tune-up, it will be important to make sure that the ignition control module, the spark plug wires, and the spark plugs are replaced...

My Check Engine Light is on - code P0010. The intake camshaft position actuator solenoid may be faulty.

Hello. The P0010 code indicates a bigger difference in the cam timing (relative to the crankshaft) than should be possible with variable valve timing, which this engine employs. This could be the variable valve timing actuator on the camshaft as...

How do I adjust the headrests?

All of your seats have headrests, which provide comfort and protection for your head and neck. You can raise the height of a headrest by pulling it straight up to the desired position. To lower the headrest, press the Release...

My latch hood is broken

Hi there. It is common for the hood latch cable to brake at the lever inside of the vehicle. First, you should check and see if it is connected to the latch. If it is connected then the hood latch...

Related articles

All About Car Warning Lights
Your car has a variety of warning lights to let you know when a specific feature is on, or if a part needs service or maintenance.
P0059 OBD-II Trouble Code: Heater Circuit Resistance (Bank 2 Sensor 1)
P0059 P0059 trouble code definition The definition of diagnostic trouble code p0059 is that the resistance for the heater circuit of bank 2 sensor 1 oxygen sensor is not correct. What the P0059 code means When this trouble code sets...
P0799 OBD-II Trouble Code: Pressure Control Solenoid “C” Intermittent
P0799 means that there is an issue with one of the pressure control solenoids due to faulty wiring, low or dirty fluid, or defective solenoid.