Service Engine Light on 2003 Murano - Nissan Murano Forum
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post #1 of 8 Old 07-17-2009, 08:18 PM Thread Starter
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Question Service Engine Light on 2003 Murano

My Service Engine Light came on this morning on my 2003 Murano. I just came back from autozone and they let me know it's P0456, likely a faulty fuel cap???

I have noticed my fuel cap doesn't feel as tight lately when I fill my tank, but I make sure it's tight each time if fill my tank. Why would it come on all of a sudden this morning? Is it expensive to replace? Or could it be possibly something worse? The other choices are:

Purge System Leak
Faulty Canister Vent Control Valve
Faulty purge control valve

Any help to make sense of things would help. I just don't want to walk into a mechanic not knowing what's what - I always feel taken advantage of when it comes to car problems.
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post #2 of 8 Old 07-17-2009, 09:20 PM
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If I am not mistaken I paid $15 or so for replacement cap. Cheap.

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post #3 of 8 Old 07-18-2009, 01:36 AM
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If you already tighten the gas cap so it clicks a few times, but still trips the code, I think its time to get a new gas cap.

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post #4 of 8 Old 07-18-2009, 11:39 AM
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Quote:
Originally posted by Eric L.
If you already tighten the gas cap so it clicks a few times, but still trips the code, I think its time to get a new gas cap.
Plus, you might want to see if the edge of the fuel filler tube has surface rust on it, possibly preventing a tight gas cap seal. A few people - likely those who don't garage their cars - have reported pretty bad rusting of the filler tube opening.
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post #5 of 8 Old 07-18-2009, 09:53 PM Thread Starter
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A mechanic my landlord referred me to reset the code to turn it off this morning. He said I had to go to the dealer to get a new gas cap. I had to go to 3 dealerships to finally find the one I needed. If it hasn't turned on again does that mean it's fixed? It did look a little rusted.

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post #6 of 8 Old 07-19-2009, 11:09 PM Thread Starter
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What's the best way to get rid of the surface rust on the fuel filler tube opening?
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post #7 of 8 Old 07-20-2009, 12:58 AM
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Originally posted by 03MuranoCT
What's the best way to get rid of the surface rust on the fuel filler tube opening?
Fine sand paper and elbow grease...

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post #8 of 8 Old 07-20-2009, 01:33 AM
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The question isn't how to remove the rust but rather how to remove it and keep it from coming back.

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