P0402 and P0307
06-16-2010, 08:34 PM
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P0402 and P0307
I have an 02 4.6 that is running rough even when at idle. The service light is on and was blinking for a while yesterday. Had the codes pulled and it showed a P0307 cylinder 7 misfire and a P0402 for a bad EGR valve. Does anyone know if theses codes would be related? I was also told to replace the DPFE sensor first but it is $80! Any thoughts would be appreciated.
06-19-2010, 02:13 PM
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Not in the Same Family:
402 is related to an EGR system sensor problem, maybe the DPFE sensor. A bum EGR valve is another possibility as is a bad EGR vacuum control valve. Clogged EGR passages in the intake goose-neck is another candidate as is a clogged edge orifice in the EGR pipe.....307(gotta figure that one out) is a cylinder misfire probably due to a bad ignition wire, plug or COP/plug if so equipped.
80 bucks for a DPFE sensor?? I don't think so:
http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_EGR-Pressure-Feedback-Sensor-BWD_20470049-P_2268_R|GRPSENSAMS_673813635___
Good stuff BWD.
Last edited by Kattumaram; 06-19-2010 at 02:23 PM.