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Posts Tagged: P0451

P0451, P0454 Check Engine Light

Diagnose and fix P0451, P0454 Check Engine Light GM vehicles GM has issued a service bulletin #10-06-04-001B to address trouble codes P0451, P0454 and an intermittent check engine light on the vehicles listed below. The trouble codes P0451 and P0454 are defined as: P0451 Fuel Tank Pressure Sensor Performance P0454 Fuel Tank Pressure Sensor Circuit Intermittent The fuel tank pressure sensor is part of the vehicle’s EVAPORATIVE emission system and is used to detect vapor leaks in the fuel system. For more information on EVAP systems, see this post. The … Read More

Evaporative Emissions System Primer

How does an evaporative emissions system work? The Evaporative Emissions System is responsible for preventing fuel vapors from polluting our air. If you came to this post because your vehicle won’t fill with gas, skip to the bottom of the post In the old days gas tank caps were vented to the atmosphere. That allowed outside air to enter the tank as you used up the gas inside the tank. On warm days the gas expanded and gas fumes vented backwards through the vented cap to the atmosphere. In other … Read More

P0451 P0452 P0453 P01454 Honda

Fix code P0451 P0452 P0453 P01454 Honda Shops are reporting a string of P0451 P0452 P0453 P01454 evaporative emissions codes on some 2002-04 CRV vehicles. These codes relate to the fuel tank pressure sensor that’s used to test for a leak in fuel tank vapors. The problem is most often a bum sensor.Honda has redesigned the sensor and given it a new part number #04101-PPA-A00. The new sensor is built into the evap canister bracket. That means you’ll have to remove the evap canister and the old bracket to make … Read More

P0451 Evaporative Emission Control System

Fix code P0451 Evaporative Emission Control System Pressure Sensor Range/Performance Evaporative emissions systems test for a leak in the fuel tank and associated hoses. To perform the test, the computer pulls a vacuum and checks to see if the vacuum holds. Each car maker uses a different technique to check, but most often it’s some type of fuel tank pressure sensor. This codes relates to a failure in that sensor. It’s either reporting an incorrect value, or is malfunctioning. © 2012 Rick Muscoplat

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