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#1
10-01-2013, 08:04 PM
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98 Camry code po401
I have a 98 camry 4 cyl and am continually getting egr code po401.
Ive cleaned out and tested egr ,replaced modulator,and the vac switching valve.replaced several hoses also . Car runs fine,in fact this code came the day after traveling 700 miles . ..it comes back on fairly quickly after properly resetting computer and 1 or 2 drives . Any ideas as to what else to look at ? 
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#2
10-02-2013, 03:37 PM
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Re: 98 Camry code po401
In addition to what you've checked, it could be one of the following among others:
Open or short in VSV circuit for EGR EGR valve position sensor open or short circuit Vacuum or EGR hose disconnected EGR valve position sensor Manifold absolute pressure sensor malfunction ECM
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Forum Guidelines:http://www.automotiveforums.com/vbulletin/guidelines.html "What we've got here is a failure to communicate"
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#3
10-05-2013, 08:49 PM
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Re: 98 Camry code po401
I found the problem..as u said ,it was the map sensor!
-but at least i got several other things cleaned out l, and tested like egr,the modulator did also need replacing ,and the vsv tested fine.. what causes the map to go out..clogged air lines or low pressure maybe?
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#4
10-07-2013, 12:51 AM
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Re: 98 Camry code po401
Sorry, no idea.
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Forum Guidelines:http://www.automotiveforums.com/vbulletin/guidelines.html "What we've got here is a failure to communicate"
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