SOURCE: Voltmeter drops to 9 volts on Chev 454 P30 motorhome
this is eithere a loose positive cable from the altenator to the battery or the regulator in the altenator is about to fail. if you have not had any problems starting the vehicle then most likely its a loose connection between the gauge and the charginging circuit or the gauge is faulty. take a multimeter and test the charging votage at the altenator while the vehicle is running it should measure 13.5 volts and should not change more than .5 volts. if the voltage drops more than 1 volt the regulater is bad and the altenator needs to be replaced. if it is working fine then looke for a bad connection make sure all positive and ground cables are tight. if they are replace amp gauge
SOURCE: 1995 toyota tacoma 2.7 4cyl/5 manual/4x4 P0420 trouble code
sensors maybe aftermarket or bad there very sensitive may haft to replace!!!!
SOURCE: code came back as iat sensor reading high
IAT stands for Air Intake Temperature Sensor and it is located in the intake tube coming from the air filter box tot he engine. Easiest way to find it is look at the top of your engine where it says 2200. Coming right out of that manifold is a black ribbed tube about the size of a baseball to softball. It should be going towards the direction on the front drivers side. on the back side of that tube, about 4 inches away from the intake manifold (the things that says 2200) is a plug with wires. That is your IAT Sensor. If it is unplugged, plug it back in. Otherwise unplug it and replace it. Make sure to disconnect the battery while you do this so the computer resets itself after the new one is installed. Thanks and please don't forget to rate!
SOURCE: had a po102 code on a 2002 3800 engine chevy check
HI, The DTC set PO102 is for your MAF (mass air flow) sensor. this sensors measures the air moving past it my heating a fine wire much like one inside a light bulb. Even cleaning these will not get the contaminates off. That little wire gets very hot and if dirt gets on it it will bake to it then this throws off its readings for your computer. If you checked and you have your 5 volt reference for this sensor the only other thing is to replace it. You can get re-manufactured one now at any major parts store. Good luck
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