Originally Posted by boyrs
Index of /FSM/Sentra
how is the battery and alternator? MAF & o2 sensors use voltage to report to ECM. what caused the MAF to get dirty? it'd most likely be the filter or back up of the gases from the EGR. is the car throwing any other codes? do you have the 2.5L or a 1.8L? any engine mods?
Thanks for the response. I have the 1.8L with no mods.
The battery is from 2007. I haven't had it tested or the alternator. I might run by advanced auto and have them do that....maybe even clean off the terminals although there's not visible corrosion.
I change the air filter pretty regularly. The car has 140k and I bought it with 40k and I always change the filter before it's due.
The factory service manual says that the EGR is supposed to be closed at idle. So I don't know how that would effect the car, or if it would cause it to run rich. I know if I take the cover off and force it open the car stalls immediately.
Also, the code is not throwing any codes. I know it's running rich from the exhaust, fouled plugs, and worthless dealership's report. It's not enough to throw a code however.