P0456....again - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 12-01-2010
Taylor's Avatar
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P0456....again

CEL came on yesterday. Truck is throwing code P0456.

Had this same problem earlier this year. I took the truck back to the people who installed my BL, they tightened the clamps on the filler neck, and after a reset, the light never came on again until yesterday.

What can I do? The clamps on the neck feel pretty tight. Could I have a cracked line somewhere?

Thanks.
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Old 12-01-2010
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take the vehicle somewhere and have it smoke tested...also check the gas cap, make sure it is tight and the o-ring is in good shape...also check the evap line that comes from the frame rail to the valve on the inner fender...it likes to come unplugged during the BL
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Old 12-01-2010
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Gas cap is good. Bought a new one and light still laughed at me.

Smoke test you say? Whereabouts can I get this done at?
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Old 12-01-2010
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if you're getting a cheap autozone gas cap that could be the problem. 2 of the non locking autozone gas caps have caused the light to go on. but the locking ones do not. and i lost my stock one. hahaha
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Old 12-01-2010
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the code needs to be reset after the cap is replaced or the light will stay on...smoke test at a dealer or anywhere with a smoke machine for evap
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Old 12-01-2010
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Quote:
Originally Posted by Toreador4x4 View Post
also check the evap line that comes from the frame rail to the valve on the inner fender
where is this specifically? i have been battling a P0455 on my 2.5L (i know, not the same engine). is this something i should look at?
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Old 12-01-2010
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Well im still rolling with my stock cap. I bought a new locking cap from atuozone, and the light stayed on for both caps, even after a reset.
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Old 12-01-2010
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the evap line goes to the vapor management valve mounted on the drivers inner fender, has a green cap on the evap test port...the line runs out of the VMV and down the frame
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