I was looking up the same thing and came across these answers: ...
"very well be that the egr valve is coverd in carbon. The carbon is easy to clean with a wire brush if you remove the valve.The main cause of malfunction in an egr valve is the carbon build up leaving it stuck open or closed! Simple huh?
i have a 99tl that had the same problem. simply remove the intake and clean the carbon from the passages to egr. it not difficult, it took about 15 mins and have not had trouble since, good luck!"
P0401 means insufficient EGR valve flow. It does not matter what make or model of car is involved.
Trouble code P0401 means: Exhaust Gas Recirculation Malfunction
Trouble code P0401 means:Exhaust gas recirculation flow insufficient detected
Trouble code P0401 means:Exhaust gas recirculation flow insufficient detected
Trouble code P0401 means: Exhaust gas recirculation - insufficient flow detected
Go to NAPA or AutoZone, they will tell you.
what is the Acura RSX in 2003 CD player error code
simple buy a new car with no alarm like this...problem solve :P
p0401 is related to EGR valve flow. Possible bad EGR, check passageway under EGR to see if its plugged See also for the DPFE before changing the EGR Valve.
insufficient egr flow most causes a burned silicone hose to egr pressure sensor
i live in Mexico and my question is what is la code stereo Bose acura 97 Vin no. is19uya225xvl015651 thanks
Error... I guess...