1996 honda passport, p1406 keeps appearing i have change egr valve, cleaned intake port which was clogged, and checked voltages. now the light comes on almost as soon as i start the engine im lost on this one

SOURCE: 2000 Honda Accord EGR Valve Error P0401

Jason,
-after you change the part you have to reset/clear the code

-this can be done by either:
(1) using the OBD2 code reader that Autozone used OR since option 2 (below) is very quick
(2) disconnecting the battery for about 30 seconds (this will delete all codes/radio presets/etc) but it will also clear the 'check engine' code
-this is what I do AFTER i write down my radio station presets :)

-hopefully the new EGR valve resolves your issue after you CLEAR the code
...but that code just means a an insufficient amount of Exhaust Gas recirculation (pressure difference) used to keep the emissions in check
-if it comes back, then there are a few other fixes to try also

-let me know if you need further assistance
-please remember to rate me `fix-ya`if it works
thanks

SOURCE: Cleaned out egr intake and

It's the non-OEM EGR valve. I had the same problem, replaced the EGR valve with one bought at O'Reilly's, light came back on. Spent the $ to have the intake cleaned out too, and light came back on driving home from the shop. Mechanic suggested using a Honda EGR part as it has a different port opening as the non-OEM part. Sure enough, light has stayed out since. Took non-OEM EGR valve back to O'Reilly's and **** enought to get a refund on it.

SOURCE: 2002 accord code P0401 [egr insufficient flow detected]

the code you have may not be due to insufficient lift, more likely you have either high or low voltage running through egr. replace the valve and your issues should go away.

SOURCE: 92 Honda Accord failing Emissions

look at oxygen sensor.look at egr control solenoid.

SOURCE: check engine light came on in my honda accord 1990...

this can make the light come on but so can alot of other things if it is running normal unhook the negative battery cable and let it sit like this for about 15 minutes this will reset everything in the system. If after doing this it comes back on imediately within a few hours there is some problem you should have it checked out to see why the light is on.