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Old 08-07-2009, 08:38 AM   #1 (permalink)
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PO440 Question

Keep getting a PO440 code coming up after the swap. Minor but annoying. I noticed that one of my VSV's was "ticking" one day. I didn't notice which one.

I thought I recalled reading about someone with a similar problem but I can't find the thread now. I haven't really done any troubleshooting yet other than testing the gas cap (which is fine).

Anyone have a similar issue that can give me an idea what it might be. Thanks in advance.
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Old 08-07-2009, 08:06 PM   #2 (permalink)
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Originally Posted by neoworm0 View Post
Keep getting a PO440 code coming up after the swap. Minor but annoying. I noticed that one of my VSV's was "ticking" one day. I didn't notice which one.

I thought I recalled reading about someone with a similar problem but I can't find the thread now. I haven't really done any troubleshooting yet other than testing the gas cap (which is fine).

Anyone have a similar issue that can give me an idea what it might be. Thanks in advance.
Do you have the FSM to help with the troubleshooting?
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Old 08-07-2009, 08:58 PM   #3 (permalink)
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I have a Haynes manual and some downloaded FSM's. The downloaded ones are a bit of a pain to navigate unless you know exactly what you need.

I think I have another Vapour Pressure sensor in my toolbox somewhere. I'll try switching that out and see what happens.
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