Acura Tech Tip: EVAP Large Leak Due To Gas Cap (Codes P0455 And P0456) -

Acura Tech Tip: EVAP Large Leak Due To Gas Cap (Codes P0455 And P0456)

On some 2012-2013 Acura ILX, MDX, RDX, TL, TSX and ZDX models, the stock gas cap can cause codes P0455 (EVAP system large leak) and/or P0456 (EVAP system very small leak detected).

On some 2012-2013 Acura ILX, MDX, RDX, TL, TSX and ZDX models, the stock gas cap can cause codes P0455 (EVAP system large leak) and/or P0456 (EVAP system very small leak detected). The gas cap may also be loose or have a stick-slip feeling when tightened.

The cause of the codes is a fuel fill cap gasket creates too much friction, preventing the cap from sealing properly. If the gasket is brown, the fuel fill cap has already been replaced. If the fuel cap has a black gasket, replace it with one that has a brown gasket.

Article courtesy ImportCar.

You May Also Like

Threadlocking Compounds For Vehicle Corners

To get the most out of these “liquid” tools, you first need to know how they work.

You might be seeing more blues, reds and various other colors on the threads of bolts when working on drivetrain, suspension and brake components. OEMs put these threadlocking compounds there for a reason, and not servicing them could get you into trouble. To get the most out of these “liquid” tools, you first need to know how they work.

Chassis Parts and Alignment Angles

Knowing why the adjustment is required is critical to performing the total alignment.

Ball Joint Inspection

It’s important to remember not to miss a worn joint. If a ball joint fails, the driver loses control of the vehicle.

Five Spark Plug Service And Replacement Tips

Most articles will tell you to use a torque wrench, but they never explain why.

Brake Rotor Quality Check

The brake rotor might look fine, but the problem could be internal.

Other Posts

Air Ride Suspension Diagnostics

The key to understanding the embedded logic of air ride systems is using service information.

Electric Power Steering Diagnostics

Load management for steering systems.

Steering Angle Sensor Service

Ninety percent of the time when a steering angle sensor code is active, it means the sensor needs to be calibrated.

Properties of Pistons

Pistons are perhaps one of the more sophisticated chunks of metal in the picture. Here’s what you should know.