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Ask A. Penland Your Own Question
A. Penland
A. Penland, Ford Senior Master Technician, ASE
Category: Ford
Satisfied Customers: 6435
Experience:  ASE Master Certified, ASE Advanced Gasoline Engine Performance
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Code read po456 evap control system very small leak -

Customer Question

code read po456 evap control system very small leak - canister purge valve solenoid - trying to find where it is located on my 06 f250 4x4 (5.4) xlt.
JA: How old are the hoses? And what driving conditions do you most often encounter?
Customer: all original & we live in Ohio (varies) cold snow sun heat rain etc...
JA: What is the model/year of your Ford?
Customer: 2006 ford f250 xlt 4wd (5.4)
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Yes, funds tell me I must. I just got the code & am starting to work on it.
JA: Anything else you think the mechanic should know?
Customer: i have done older cars & truck repair - no expert, just hobby & necessary repairs
Submitted: 8 months ago.
Category: Ford
Expert:  A. Penland replied 8 months ago.

Is P0456 the only trouble code you got?
What is leading you to the Canister Purge Solenoid?

Customer: replied 8 months ago.
The code was translated by Auto Zone as this being a probable answer.
Customer: replied 8 months ago.
I do not have a smart phone only computer & flip phone - answers on computer are best
Customer: replied 8 months ago.
Occasionally I do smell gas once I start it & a couple time while driving then it stops smelling.
Customer: replied 8 months ago.
only code - got it twice (0.020 leak both times)
Expert:  A. Penland replied 8 months ago.

Ok. If you smell the fuel at the rear of the vehicle, look at the gas cap or the Canister vent solenoid on the charcoal canister under the vehicle. But if you smell it under the hood, look for the canister purge valve under the hood near the fire wall and the brake booster. See the diagrams below.