Check engine light indicated P0457, Purge Valve replacement instructions needed

Here are the directions for replacing the canister purge valve. The attached pics correlate with the directions. The code you have doesn't pertain to this as a problem.

In this case, the evap system needs smoke tested. Basically, smoke is injected into the EVAP system at a very low psi. Where the leak is located, smoke will come out. That way you locate the leak.

Regardless, here are the directions your requested:

2010 Ford Focus L4-2.0L
Evaporative Emission Canister Purge Valve
Vehicle Powertrain Management Emission Control Systems Evaporative Emissions System Canister Purge Control Valve Service and Repair Removal and Replacement Evaporative Emission Canister Purge Valve
EVAPORATIVE EMISSION CANISTER PURGE VALVE
303-13 Evaporative Emissions 2010 Focus
REMOVAL AND INSTALLATION
Evaporative Emission Canister Purge Valve

Pic 1

Item Part Number Description
1 9G683 Evaporative Emission (EVAP) canister purge valve bracket
2 9G641 EVAP canister purge valve
3 14A464 EVAP canister purge valve electrical connector
4 †Vapor jumper tube-to- EVAP canister purge valve quick connect coupling (part of 9D289)
5 †Vapor jumper tube-to- EVAP canister purge valve quick connect coupling (part of 9L291)
6 W709438 Heat shield retainer (2 required)
7 †Heat shield
Removal and Installation

image WARNING: Do not smoke, carry lighted tobacco or have an open flame of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.

Image WARNING: Do not carry personal electronic devices such as cell phones, pagers or audio equipment of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.

Image WARNING: Always disconnect the battery ground cable at the battery when working on an evaporative emission (EVAP) system or fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.

Disconnect the battery ground cable. For additional information, refer to Section 414-01.
Remove the 2 retainers and the heat shield.
Disconnect the Evaporative Emission (EVAP) canister purge valve electrical connector.
Disconnect the 2 vapor jump tube-to- EVAP canister purge valve quick connect couplings. For additional information, refer to Section 310-00.
Press the locking tab and remove the EVAP canister purge valve from the bracket.

Pic 2

To install, reverse the removal procedure.

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Let me know if this helps or if you have other questions.

Take care,
Joe

Hi Jon. Sorry to hear it didn't work. As far as smoking the system, there is a special fog/smoke machine that is used. It actually attaches to the EVAP system. I have to be honest, it isn't a cheap thing to purchase. Is there any shop in the area that would do it for you at a low price? I don't know where you are located, but I'm near Pittsburgh and on average it cost around 40 to 50 dollars to have done.

As far as doing it without, I have heard all kinds of different theories. For example, one man connected a vacuum hose to the intake system and blew cigar smoke into it. He said it worked, but I have no idea how it would make its way through the entire system. Actually, it made no sense to me.

I wish I had a better answer for you. Let me know if you can find someone local to you.

Joe

Hi,

Chances are, smoke testing won't help with that one. That is related to the evap pressure sensor switch. Since you have been working around the EVAP system, check for kinks or bends in the fuel vapor hoses/tubes between the fuel tank and dust separator. Check the EVAP canister ports and canister vent hose assembly for contamination or debris. Also, check the dust separator for blockage. The evap dust separator is mounted downstream from the canister vent solenoid. Its job is to keep dust and dirt particles out of the evap system.

Let me know if that helps. Also, let me know if you have any issue getting fuel to enter the fuel tank.

Joe