Code P0455
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Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
Start with the gas cap. Make sure its seal and the sealing surface isn't damaged and that it is properly closed after fueling. If replacing, use only a Motorcraft replacement.
After that, it gets harder.
After that, it gets harder.
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Mountain Pass
Joined: Feb 2000
Posts: 120
Likes: 2
From: PA
Found that the EVAP purge valve will not hold a vacuum. Ordered that and a new Motorcraft gas cap.
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Mountain Pass
Joined: Feb 2000
Posts: 120
Likes: 2
From: PA
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Mountain Pass
Joined: Feb 2000
Posts: 120
Likes: 2
From: PA
Question: If I pinch off the line going to the intake manifold from the EVAP purge valve will that take out all the things downstream of the purge valve? Thought I may try that and then look at my readings and see if anything changed. Currently the long term fuel trims are above +10%
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Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
All that would do is give you a different fault code when the system discovers that it can't bleed up tank vacuum.
Don't wander off into the weeds down a rabbit trail.... Stay on the path that you've been given.
Don't wander off into the weeds down a rabbit trail.... Stay on the path that you've been given.
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
Maybe, maybe not. Premature.
You need to do what was already recommended, reset the PCM's memory, then wait for the PCM to (eventually) run the EVAP monitor and THEN see if it passed or failed. I see no indication that you've done any of that.
If the monitor fails again with the same P0455, code, then smoking the system makes sense. Make sure you follow the explicit instructions for doing that.
You need to do what was already recommended, reset the PCM's memory, then wait for the PCM to (eventually) run the EVAP monitor and THEN see if it passed or failed. I see no indication that you've done any of that.
If the monitor fails again with the same P0455, code, then smoking the system makes sense. Make sure you follow the explicit instructions for doing that.
Thread Starter
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Mountain Pass
Joined: Feb 2000
Posts: 120
Likes: 2
From: PA
Maybe, maybe not. Premature.
You need to do what was already recommended, reset the PCM's memory, then wait for the PCM to (eventually) run the EVAP monitor and THEN see if it passed or failed. I see no indication that you've done any of that.
If the monitor fails again with the same P0455, code, then smoking the system makes sense. Make sure you follow the explicit instructions for doing that.
You need to do what was already recommended, reset the PCM's memory, then wait for the PCM to (eventually) run the EVAP monitor and THEN see if it passed or failed. I see no indication that you've done any of that.
If the monitor fails again with the same P0455, code, then smoking the system makes sense. Make sure you follow the explicit instructions for doing that.
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
I have one fail, $32 - EGR Monitor Bank 2, but no codes so far. Should I be concerned with that?
Just drive it and see if it posts any actual faults accompanied by a P-code.
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Mountain Pass
Joined: Feb 2000
Posts: 120
Likes: 2
From: PA
Only asking. Don't plan on doing anymore work as long as the code does not come back. No Torque Pro. OBDLink SX and looking at the diagnostic report, Mode $06 - On-Board Monitoring. Plan on taking it out today and see if the code comes back. Thanks for you help.
