2001 Pontiac Grand Am SE "po440 check engine light" Questions

...po440. If the service engine soon light is off then I can put gas in at the pump. Pleas help thank you sounds like you have a vent valve problem, po440 is that something is wrong with evap system, ...

...po440 and when I try to start it all the lights go out and cranks very hard. The battery is fully charged and I don't understand the problem. thanks for your time and help with this. P0420 Catalyst ...

...check engine light came on. I scanned it and a P0440 code appeared. It was still running until three days ago. It turns over over but it cuts right off. I found a blown fuse, it was the canister vent ...

...check engine light came on so I took to Autozone, which the code was PO440. I replace the gas cap. The light turn off for about 2 months. The check engine light c The check engine light came on, so I ...

...po440 the check engine light came on .. i checked the gas cap it was loose ... tightened it fillled it up with fuel....the light didn't go out. i had it scanned and got the po440 issue....had the ...

po440 pending why would it say that Some fault codes require multiple stop/start cycles (operating the vehicle) before it will throw a check engine light. When the code says it is pending, the ECU has

...check engine light on,code po440,po420,po441, these 3 codes are the ones scanner brings up,po440,po441,po420 P0420 is catalyst system efficiency below threshold (bank 1) P0440 is evaporative emission ...

Check Engine light in 2001 Toyota Echo, fault codes PO440, 441, 446 Months ago (prior to 60 K miles) my Check Engine light went on. We've tried changing the gas cap and resetting the fuses, ...

is check engine light on? i went to check a week ago what was the problem it was something about gas so i change the gas cap and the check engine light is stiil on That mean is more then gas cap,po440

...po440 is a large leak in - Evaporative System, A bad fuel cap seal will cause this also. remove cap and replace it on tight, and see if light goes out. Check all vacuum hoses, Under hood, and car. ...