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post #1 of 6 (permalink) Old 03-17-2011, 12:45 PM Thread Starter
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Diagnostic code help

Po344
Po603

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1997 f-250 438hp 778tq sold
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post #2 of 6 (permalink) Old 03-17-2011, 01:16 PM
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Re: Diagnostic code help

P0344 = Cam Position sensor
P0603 = Keep alive memory
Is it a no start?

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post #3 of 6 (permalink) Old 03-17-2011, 01:49 PM Thread Starter
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Re: Diagnostic code help

No it starts and runs I just have a rough idle do I news a cam sensor?

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post #4 of 6 (permalink) Old 03-17-2011, 02:10 PM
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Re: Diagnostic code help

Well, i have not seen a CPS cause a rough idle, but I have read a few threads about driveabilty problems caused by a bad CPS. I think there are a few different color CPS's that have been available and I'm not sure which one is best, if you search the site you should be able to find some threads about it or just wait someone else will chime in. A new CPS from the dealer is only about $25 .

2015 Challenger HellCat Redline Red 8sp
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post #5 of 6 (permalink) Old 03-17-2011, 02:12 PM Thread Starter
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Re: Diagnostic code help

What does the other code mean

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post #6 of 6 (permalink) Old 03-17-2011, 08:34 PM
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Re: Diagnostic code help

The 603 code comes up if you have disconnected the batteries recently. The CPS can and will cause a rough idle if it is bad.

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