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post #1 of 5 (permalink) Old 03-19-2011, 04:32 PM Thread Starter
 
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Check Engine light

The check engine light on my new to me 97 F-150 comes on once in a while. I put it on a scanner and I got code P0402 (exhaust gas flow excessive detected) What does this mean?

1997 F-150 xl
1984 Honda XR200R (the toy)
2007 Honda CRF100f (the spare toy)
2005 Jayco Baja 10Y (the home away from home)
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post #2 of 5 (permalink) Old 03-19-2011, 05:14 PM
 
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A code P0402 most likely means one or more of the following has happened:

The DPFE (differential pressure) sensor is faulty and needs to be replaced
There is a blockage in the EGR (most likely carbon buildup)
The EGR valve is faulty
The EGR valve may not be opening due to a lack of vaccuum

Possible SolutionsWith a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor.

Check the voltage at the DPFE sensor both at idle and when the EGR is open
Replace the DPFE sensor

i found this here

http://www.obd-codes.com/p0402

2013 f150 Ecobeast
3.55 E locker
FX4 Screw
SSI tuned!!!!!!!!!!!!!!!!!
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post #3 of 5 (permalink) Old 03-19-2011, 08:22 PM Thread Starter
 
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Thanks, I'm gonna bookmark that site.

1997 F-150 xl
1984 Honda XR200R (the toy)
2007 Honda CRF100f (the spare toy)
2005 Jayco Baja 10Y (the home away from home)
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post #4 of 5 (permalink) Old 03-19-2011, 08:53 PM
 
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I hope it helps..those codes can mean so many things.

2013 f150 Ecobeast
3.55 E locker
FX4 Screw
SSI tuned!!!!!!!!!!!!!!!!!
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post #5 of 5 (permalink) Old 03-19-2011, 09:27 PM Thread Starter
 
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Location: Calgary Alberta
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I joined up cause my brother inlaws F-350 is giving him a few different codes too. We just got the scanner and are a little confused with all the different codes from the 3 different vehicles we are scanning. Better than throwing momey away guessing what parts need replacing.

1997 F-150 xl
1984 Honda XR200R (the toy)
2007 Honda CRF100f (the spare toy)
2005 Jayco Baja 10Y (the home away from home)
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