Pontiac Grand Prix Forum : “mass air flow sensor”
mass air flow sensor
I have a 1999 grand prix gt. My service engine light came on and i went to auto store and used the computer. It indicates the mass air flow sensor is problem. So I tried some cleaner and reset the light. all was well but then the engine started a little rough one morning and it came back on. the engine runs great after that initial start, idles fine etc... I would like to just replace the mass air flow sensor but want to make sure its not something else. The car has about 110k miles. On a 150 mile trip the light actually went off but when i restarted car after a bathroom stop, it came back on. What do you think. I have taken readings at the auto store several times. always mass airflow sensor.
ok, i went and got the read again. it says 7 of 8 readiness then i go to look at code and it only says " Mass or Volume Air Flow Circuit Low Input" no other codes. I asked if it should have some more codes and dude said you may not be getting additional codes cause its a new problem.
The sensor itself is going out, cleaning it will not help. Replacing it is your option.
FYI, use of any spray cleaner on the mass airflow sensor is NOT reccommended. In general, cleaning of any kind on most mass airflow sensors are NOT reccommended.
Then Jeff, you should know that a small piece of dirt would not effect it. A large piece of dirt would (and could be removed by hand.) I am also ASE, not a hard test if you know what you are doing.
Yes it will affect it. Look, I'm not going to get into an argument with you about it. I've had engines with MAFs run like crap, and cleaning the MAF took care of the issue. Using something like brake clean or carb clean which is not oil and completely evaporates does not harm it.
the mass air flow sensor doesn't change the way the car runs for the most part. My lights been on for almost a year but I couldn't find an upgraded sensor. My car also was rough off the start but then runs fine after a minute sometimes it would die out right after I started it, the problem turned out to be the fuel pump resistor but I went through three mechanics who told me it MAS

