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did you replace it with new one, or used one?? also have you replaced your air filter and used NISSAN only air filter. something tells me that you had non nissan/aftermarket air filter installed and that is why your air flow meter failed. you need to use nissan air filter ONLY in your model nissan. sentras do not like non nissan air filter, because non nissan filters are not coated in small amount of oil and let foreign particals / dirt go pass the filter and that will fry your $500 air flow meter.
Often the emissions system can keep an engine from starting. The most common issue is the MAF, ( mass air flow ), sensor.
If you can locate the air intake duct, ( this is the duct work that your air filter sits in ), between the location of the filter towards the engine, right on top of the duct you should see a small device with a plug that has 4 or 5 wires. Very carefull disconnect the plug. Now try to start your engine. If it starts, you should get a new MAF.
has to be air bound.with vehicle running but before it gets too hot remove outlet hose from heater core at bulkhead.wait for consistant waterflow out of hose then reinstall and top up system.now the bad ....where did the air come from?these engines are becoming notorious for head gasket failure.does it ever miss and run rough for fist few seconnds after a cold start?if so this is probably your issue.
I couldn't find info on the '05, but did find it for the '06. I'm hoping they are the same, so here is the info: There is a control panel that has the following controls, starting at the left, there is a round dial for temperature control, next (to the right of that dial) is the round fan speed dial, next to that (to the right) are a row of 3 (if you have air cond, if not there may be blank covers over the bottom one or two) rectangular push buttons, arranged from top to bottom, the top is the rear window defroster, under that are 2 more rectangular buttons for air conditioning (if equipped), and to the right of those is another round dial to select air flow (foot level, windshield defrost, etc.) Hope this helps.
on nissan's air vent controls, they use electronic servos already. this may entail that you havta dis assemble half of your dashboard. unless you're quite savvy in doing this and locate each servo in its separate locations in each air vent; i suggest that you bring it in to a shop.
Not all switches switch the possitive side of the electrical cicuit, sometimes it switches the negative side and than you wont find current there. The airconditioner unit has a low pressure switch in the system somewhere in the pipe that monitors the amount of gas in the system and if the gas is not enough the switch will not allow current to flow through to the compressor, it is just to protect the compressor from siezing up if there is no lubricant in the system