Questions & Answers for: chevrolet po401 code

Code po401 chevy venture LS 1997 the code take's a while to set , then i reset it and it takes about a week of driving for it to reset , is there a blockage problem with the EGR and is there a passage

turned car off at gas station want start back acts like missin acts like starvin for gas put on computer gives back codes po401,po404,po446,po452,po453 all of these problem codes refer to EGR valve ...

...Code PO401 PO-401 EGR Flow Insufficient Detected Exhaust gas recirculation flow insufficient. This has to do with the exhaust gas passing through the EGR valve. There could be a leak in the exhaust ...

code po401. i have brainstormed around the egr area, but haven't solved it yet. what do you think the problem is? Could be a dirty EGR pintle passage area. This is a common problem where carbon builds

...po401 is back. car sounds better, but i wanna get the code and service engine line off. any ideas? Well, the po401 is saying is that the egr valve has restricted flow. After changing the egr and the ...

...po401 diagnstic code? i have already changed the egr valve and egr tube. what can it be? it's killing my gas mileage. problem is usually a deteriorated vacuum line, the hard part is finding the hose. ...

po401 ive cleaned the egr & replaced the egr but i keep getting this code?? depending on your model, there may be a solenoid valve that turns the vacuum to the egr valve on. If the solenoid fails,

Code P0401 on a 1996 monte carlo Google the code OBD2 PO401 add your vehicle if you like

Code PO401. I believe EGR passage in plugged. Will GM&#;s Top Engine Cleaner work? diagnostic aids: a vacuum restriction to the map sensor--a skewed map sensor reading can cause the PCM to read an