PO4DB check engine code - Mustang Ecoboost Forum
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post #1 of 4 Old 02-05-2016, 01:35 PM Thread Starter
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PO4DB check engine code

Recently started getting the PO4DB CEL code, im running a Mishimoto 3" downpipe, CAI, Removed the resonator, a BOV and Bama tune
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post #2 of 4 Old 02-08-2016, 08:28 AM
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Originally Posted by Wildpony61 View Post
Recently started getting the PO4DB CEL code, im running a Mishimoto 3" downpipe, CAI, Removed the resonator, a BOV and Bama tune
P04DB - Crankcase Ventilation System Disconnected
Description: This DTC sets when the crankcase ventilation sensor voltage drops below 2.5 V


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post #3 of 4 Old 02-08-2016, 11:02 AM Thread Starter
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Yes, I know what the code is, how do I fix it?
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post #4 of 4 Old 02-08-2016, 12:07 PM
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Originally Posted by Wildpony61 View Post
Yes, I know what the code is, how do I fix it?
Well have you checked it yet to ensure it hasn't become disconnected? The first thing you want to do is check the obvious.


Do you know whether this is a "soft" code or not? Will the code clear if you disconnect the battery for a few minutes?


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