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PM0431800 low voltage, or no voltage

Starting problem as well, RPMs unsteady

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Why my alternator dont charge at normal engine idle thanks

You have rvc/regulated voltage control, that circuitry is in your pcm. I'm not saying the pcm is faulty, at the moment, I don't know? You also have a battery temp sensor in the battery tray housing, that might cause problems?
Check for applicable charging system trouble codes, if you haven't already.

Mar 30, 2017 | Jeep Cars & Trucks

1 Answer

Why doesn't it start?

gen sets have to be run at set rpms so that the voltage and cycles are correct for the applications
with the rpms as little as 100 rpms below requirement , the voltage will be down , causing a brown out which burns out electric motors and if the rpms are low the required cycles will also be off which affects electronic equipment
service the gen set and find out why the rpms are not at the set level

Jan 09, 2016 | Generac Guardian Air-Cooled Standby...

1 Answer

Miller roughneck 2e has low voltage 0ut of 120 volt receptacle only 5 volts at idle and 45 volts under power

have the alternator checked by an electrician
a t idle will be low as the exciter circuit will be producing low volts but it should go up when at operating rpms
45 volts at rpms indicates that the field windings of the alternator are not getting full current to produce the desired out put

Nov 20, 2015 | Miller Electrical Supplies

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If RPMs are correct at 3600, my frequency is correct at 60. My voltage is low at 170. Is there a way to adjust the voltage?


I believe you are referring to a 220 VAC generator. If you have the correct 60 Hz check the voltage of each leg to neutral. If one or both are low it is in the generator section. The regulated voltage is just for the peak voltage. It does not affect lower voltages unless of course there is a loose (hot) connection.

I hope this helps,

Jul 10, 2015 | Electrical Supplies

1 Answer

Alternator or Voltage Regulator or Other?

You will need to test the charging system. Try this simple test, hook a voltmeter to the battery and check the voltage with the key turned off. Should be 12 volts. Now start the engine and note the volt meter reading at idle, it should go up to about 13.8 - 14.2 volts. Rev the engine up and note what happens. If the voltage is low at low RPM 12V and then goes up with more RPM like you stated it could be the regulator or the alternator. Start by switching out or trying another voltage regulator. If this does not fix the problem you will need to test and repair the alternator. The alternator out put can be tested by bypassing the regulator. This requires special equipment and know how. I hope this gets you

Jun 30, 2015 | Honda GL 1500 SE Gold Wing Motorcycles

1 Answer

I have a 2000 Nissan Sentra GXE. The engine has a judder on acceleration. Most noticeable between 2 and 3k rpms. It does it on hard throttle at speed also.I have no check engine light on and have replaced...

Try replacing the IAC ( idle air control). They can cause the hesitations and can also cause the vehicles ilde to jump up and down. Also check for any loose vaccuum lines.

Oct 25, 2012 | Cars & Trucks

1 Answer

Engine light on. scanned and p1388 code. What is the meaning of this code?

P1338 - Fuel Pump feedback circuit low/high voltage. This is indicating that your fuel pump is either getting too much voltage or too little voltage as is sensed by the fuel pump control module. Now, this can be caused by either bad wiring connections or a battery not charging causing low voltage. Should read 14 1/2 volts if charging at 1500 rpms

Apr 15, 2011 | 2002 Jaguar S-Type

1 Answer

2005 GMC Canyon - service engine light came on - then the battery light came on - took it to the dealer. The battery was replaced and the service engine light went out. The truck still had low rpms at...

Sounds as if your alternator is not charging the battery. The battery is the main source of your engine "spark". the alternator is across the leads to supply charging to bring your battery up to the 13.2 volts that is available. Of course the alternator will run your auto if it is producing voltage, i.e. jump start, or push start. It takes a certain voltage to run your computer which monitors the battery and if that voltage is not sufficent to produce the timed spark, (battery runs down), then the vehicle will not fire on all cylindars.

Jan 22, 2011 | 2005 GMC Canyon

1 Answer

Bike does not start after an hour of riding.

test stator loaded and unloaded,then do voltage drop test

Aug 10, 2009 | 2001 Honda VT 1100 C2 Shadow Sabre

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